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15 results on '"Schlotter W"'

1. Ultrafast modification of the electronic structure of a correlated insulator

Author

Grånäs, Oscar, Vaskivskyi, I., Wang, X., Thunström, Patrik, Ghimire, S., Knut, Ronny, Söderström, Johan, Kjellsson, L., Turenne, Diego, Engel, R. Y., Beye, M., Lu, J., Higley, D. J., Reid, A. H., Schlotter, W., Coslovich, G., Hoffmann, M., Kolesov, G., Schissler-Langeheine, C., Styervoyedov, A., Tancogne-Dejean, N., Sentef, M. A., Reis, D. A., Rubio, A., Parkin, S. S. P., Karis, Olof, Rubensson, J. -e., Eriksson, Olle, Dürr, Hermann, Grånäs, Oscar, Vaskivskyi, I., Wang, X., Thunström, Patrik, Ghimire, S., Knut, Ronny, Söderström, Johan, Kjellsson, L., Turenne, Diego, Engel, R. Y., Beye, M., Lu, J., Higley, D. J., Reid, A. H., Schlotter, W., Coslovich, G., Hoffmann, M., Kolesov, G., Schissler-Langeheine, C., Styervoyedov, A., Tancogne-Dejean, N., Sentef, M. A., Reis, D. A., Rubio, A., Parkin, S. S. P., Karis, Olof, Rubensson, J. -e., Eriksson, Olle, and Dürr, Hermann

Abstract

A nontrivial balance between Coulomb repulsion and kinematic effects determines the electronic structure of correlated electron materials. The use of electromagnetic fields strong enough to rival these native microscopic interactions allows us to study the electronic response as well as the time scales and energies involved in using quantum effects for possible applications. We use element-specific transient x-ray absorption spectroscopy and high-harmonic generation to measure the response to ultrashort off-resonant optical fields in the prototypical correlated electron insulator NiO. Surprisingly, fields of up to 0.22 V/angstrom lead to no detectable changes in the correlated Ni 3d orbitals contrary to previous predictions. A transient directional charge transfer is uncovered, a behavior that is captured by first-principles theory. Our results highlight the importance of retardation effects in electronic screening and pinpoints a key challenge in functionalizing correlated materials for ultrafast device operation.

Published
2022
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2. Ultrafast modification of the electronic structure of a correlated insulator

Author

Grånäs, Oscar, Vaskivskyi, I., Wang, X., Thunström, Patrik, Ghimire, S., Knut, Ronny, Söderström, Johan, Kjellsson, L., Turenne, Diego, Engel, R. Y., Beye, M., Lu, J., Higley, D. J., Reid, A. H., Schlotter, W., Coslovich, G., Hoffmann, M., Kolesov, G., Schissler-Langeheine, C., Styervoyedov, A., Tancogne-Dejean, N., Sentef, M. A., Reis, D. A., Rubio, A., Parkin, S. S. P., Karis, Olof, Rubensson, J. -e., Eriksson, Olle, Dürr, Hermann, Grånäs, Oscar, Vaskivskyi, I., Wang, X., Thunström, Patrik, Ghimire, S., Knut, Ronny, Söderström, Johan, Kjellsson, L., Turenne, Diego, Engel, R. Y., Beye, M., Lu, J., Higley, D. J., Reid, A. H., Schlotter, W., Coslovich, G., Hoffmann, M., Kolesov, G., Schissler-Langeheine, C., Styervoyedov, A., Tancogne-Dejean, N., Sentef, M. A., Reis, D. A., Rubio, A., Parkin, S. S. P., Karis, Olof, Rubensson, J. -e., Eriksson, Olle, and Dürr, Hermann

Abstract

A nontrivial balance between Coulomb repulsion and kinematic effects determines the electronic structure of correlated electron materials. The use of electromagnetic fields strong enough to rival these native microscopic interactions allows us to study the electronic response as well as the time scales and energies involved in using quantum effects for possible applications. We use element-specific transient x-ray absorption spectroscopy and high-harmonic generation to measure the response to ultrashort off-resonant optical fields in the prototypical correlated electron insulator NiO. Surprisingly, fields of up to 0.22 V/angstrom lead to no detectable changes in the correlated Ni 3d orbitals contrary to previous predictions. A transient directional charge transfer is uncovered, a behavior that is captured by first-principles theory. Our results highlight the importance of retardation effects in electronic screening and pinpoints a key challenge in functionalizing correlated materials for ultrafast device operation.

Published
2022
Full Text
View/download PDF

3. Ultrafast modification of the electronic structure of a correlated insulator

Author

Grånäs, Oscar, Vaskivskyi, I., Wang, X., Thunström, Patrik, Ghimire, S., Knut, Ronny, Söderström, Johan, Kjellsson, L., Turenne, Diego, Engel, R. Y., Beye, M., Lu, J., Higley, D. J., Reid, A. H., Schlotter, W., Coslovich, G., Hoffmann, M., Kolesov, G., Schissler-Langeheine, C., Styervoyedov, A., Tancogne-Dejean, N., Sentef, M. A., Reis, D. A., Rubio, A., Parkin, S. S. P., Karis, Olof, Rubensson, J. -e., Eriksson, Olle, Dürr, Hermann, Grånäs, Oscar, Vaskivskyi, I., Wang, X., Thunström, Patrik, Ghimire, S., Knut, Ronny, Söderström, Johan, Kjellsson, L., Turenne, Diego, Engel, R. Y., Beye, M., Lu, J., Higley, D. J., Reid, A. H., Schlotter, W., Coslovich, G., Hoffmann, M., Kolesov, G., Schissler-Langeheine, C., Styervoyedov, A., Tancogne-Dejean, N., Sentef, M. A., Reis, D. A., Rubio, A., Parkin, S. S. P., Karis, Olof, Rubensson, J. -e., Eriksson, Olle, and Dürr, Hermann

Abstract

A nontrivial balance between Coulomb repulsion and kinematic effects determines the electronic structure of correlated electron materials. The use of electromagnetic fields strong enough to rival these native microscopic interactions allows us to study the electronic response as well as the time scales and energies involved in using quantum effects for possible applications. We use element-specific transient x-ray absorption spectroscopy and high-harmonic generation to measure the response to ultrashort off-resonant optical fields in the prototypical correlated electron insulator NiO. Surprisingly, fields of up to 0.22 V/angstrom lead to no detectable changes in the correlated Ni 3d orbitals contrary to previous predictions. A transient directional charge transfer is uncovered, a behavior that is captured by first-principles theory. Our results highlight the importance of retardation effects in electronic screening and pinpoints a key challenge in functionalizing correlated materials for ultrafast device operation.

Published
2022
Full Text
View/download PDF

4. Ultrafast modification of the electronic structure of a correlated insulator

Author

Grånäs, Oscar, Vaskivskyi, I., Wang, X., Thunström, Patrik, Ghimire, S., Knut, Ronny, Söderström, Johan, Kjellsson, L., Turenne, Diego, Engel, R. Y., Beye, M., Lu, J., Higley, D. J., Reid, A. H., Schlotter, W., Coslovich, G., Hoffmann, M., Kolesov, G., Schissler-Langeheine, C., Styervoyedov, A., Tancogne-Dejean, N., Sentef, M. A., Reis, D. A., Rubio, A., Parkin, S. S. P., Karis, Olof, Rubensson, J. -e., Eriksson, Olle, Dürr, Hermann, Grånäs, Oscar, Vaskivskyi, I., Wang, X., Thunström, Patrik, Ghimire, S., Knut, Ronny, Söderström, Johan, Kjellsson, L., Turenne, Diego, Engel, R. Y., Beye, M., Lu, J., Higley, D. J., Reid, A. H., Schlotter, W., Coslovich, G., Hoffmann, M., Kolesov, G., Schissler-Langeheine, C., Styervoyedov, A., Tancogne-Dejean, N., Sentef, M. A., Reis, D. A., Rubio, A., Parkin, S. S. P., Karis, Olof, Rubensson, J. -e., Eriksson, Olle, and Dürr, Hermann

Abstract

A nontrivial balance between Coulomb repulsion and kinematic effects determines the electronic structure of correlated electron materials. The use of electromagnetic fields strong enough to rival these native microscopic interactions allows us to study the electronic response as well as the time scales and energies involved in using quantum effects for possible applications. We use element-specific transient x-ray absorption spectroscopy and high-harmonic generation to measure the response to ultrashort off-resonant optical fields in the prototypical correlated electron insulator NiO. Surprisingly, fields of up to 0.22 V/angstrom lead to no detectable changes in the correlated Ni 3d orbitals contrary to previous predictions. A transient directional charge transfer is uncovered, a behavior that is captured by first-principles theory. Our results highlight the importance of retardation effects in electronic screening and pinpoints a key challenge in functionalizing correlated materials for ultrafast device operation.

Published
2022
Full Text
View/download PDF

5. Ultrafast modification of the electronic structure of a correlated insulator

Author

Grånäs, Oscar, Vaskivskyi, I., Wang, X., Thunström, Patrik, Ghimire, S., Knut, Ronny, Söderström, Johan, Kjellsson, L., Turenne, Diego, Engel, R. Y., Beye, M., Lu, J., Higley, D. J., Reid, A. H., Schlotter, W., Coslovich, G., Hoffmann, M., Kolesov, G., Schissler-Langeheine, C., Styervoyedov, A., Tancogne-Dejean, N., Sentef, M. A., Reis, D. A., Rubio, A., Parkin, S. S. P., Karis, Olof, Rubensson, J. -e., Eriksson, Olle, Dürr, Hermann, Grånäs, Oscar, Vaskivskyi, I., Wang, X., Thunström, Patrik, Ghimire, S., Knut, Ronny, Söderström, Johan, Kjellsson, L., Turenne, Diego, Engel, R. Y., Beye, M., Lu, J., Higley, D. J., Reid, A. H., Schlotter, W., Coslovich, G., Hoffmann, M., Kolesov, G., Schissler-Langeheine, C., Styervoyedov, A., Tancogne-Dejean, N., Sentef, M. A., Reis, D. A., Rubio, A., Parkin, S. S. P., Karis, Olof, Rubensson, J. -e., Eriksson, Olle, and Dürr, Hermann

Abstract

A nontrivial balance between Coulomb repulsion and kinematic effects determines the electronic structure of correlated electron materials. The use of electromagnetic fields strong enough to rival these native microscopic interactions allows us to study the electronic response as well as the time scales and energies involved in using quantum effects for possible applications. We use element-specific transient x-ray absorption spectroscopy and high-harmonic generation to measure the response to ultrashort off-resonant optical fields in the prototypical correlated electron insulator NiO. Surprisingly, fields of up to 0.22 V/angstrom lead to no detectable changes in the correlated Ni 3d orbitals contrary to previous predictions. A transient directional charge transfer is uncovered, a behavior that is captured by first-principles theory. Our results highlight the importance of retardation effects in electronic screening and pinpoints a key challenge in functionalizing correlated materials for ultrafast device operation.

Published
2022
Full Text
View/download PDF

6. Publisher Correction : Beyond a phenomenological description of magnetostriction

Author

Reid, A. H., Shen, X., Maldonado, Pablo, Chase, T., Jal, E., Granitzka, P. W., Carva, K., Li, R. K., Li, J., Wu, L., Vecchione, T., Liu, T., Chen, Z., Higley, D. J., Hartmann, N., Coffee, R., Wu, J., Dakowski, G. L., Schlotter, W. F., Ohldag, H., Takahashi, Y. K., Mehta, V., Hellwig, O., Fry, A., Zhu, Y., Cao, J., Fullerton, E. E., Stohr, J., Oppeneer, Peter M., Wang, X. J., Dürr, Hermann A., Reid, A. H., Shen, X., Maldonado, Pablo, Chase, T., Jal, E., Granitzka, P. W., Carva, K., Li, R. K., Li, J., Wu, L., Vecchione, T., Liu, T., Chen, Z., Higley, D. J., Hartmann, N., Coffee, R., Wu, J., Dakowski, G. L., Schlotter, W. F., Ohldag, H., Takahashi, Y. K., Mehta, V., Hellwig, O., Fry, A., Zhu, Y., Cao, J., Fullerton, E. E., Stohr, J., Oppeneer, Peter M., Wang, X. J., and Dürr, Hermann A.

Abstract

WoS title: Beyond a phenomenological description of magnetostriction (vol 9, 388, 2018)Correction to: Nature Communications, vol. 9, article number: 388. DOI: 10.1038/s41467-017-02730-7

Published
2018
Full Text
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7. Beyond a phenomenological description of magnetostriction

Author

Reid, A. H., Shen, X., Maldonado, Pablo, Chase, T., Jal, E., Granitzka, P. W., Carva, K., Li, R. K., Li, J., Wu, L., Vecchione, T., Liu, T., Chen, Z., Higley, D. J., Hartmann, N., Coffee, R., Wu, J., Dakovski, G. L., Schlotter, W. F., Ohldag, H., Takahashi, Y. K., Mehta, V., Hellwig, O., Fry, A., Zhu, Y., Cao, J., Fullerton, E. E., Stohr, J., Oppeneer, Peter M., Wang, X. J., Dürr, Hermann, Reid, A. H., Shen, X., Maldonado, Pablo, Chase, T., Jal, E., Granitzka, P. W., Carva, K., Li, R. K., Li, J., Wu, L., Vecchione, T., Liu, T., Chen, Z., Higley, D. J., Hartmann, N., Coffee, R., Wu, J., Dakovski, G. L., Schlotter, W. F., Ohldag, H., Takahashi, Y. K., Mehta, V., Hellwig, O., Fry, A., Zhu, Y., Cao, J., Fullerton, E. E., Stohr, J., Oppeneer, Peter M., Wang, X. J., and Dürr, Hermann

Abstract

Magnetostriction, the strain induced by a change in magnetization, is a universal effect in magnetic materials. Owing to the difficulty in unraveling its microscopic origin, it has been largely treated phenomenologically. Here, we show how the source of magnetostriction-the underlying magnetoelastic stress-can be separated in the time domain, opening the door for an atomistic understanding. X-ray and electron diffraction are used to separate the subpicosecond spin and lattice responses of FePt nanoparticles. Following excitation with a 50-fs laser pulse, time-resolved X-ray diffraction demonstrates that magnetic order is lost within the nanoparticles with a time constant of 146 fs. Ultrafast electron diffraction reveals that this demagnetization is followed by an anisotropic, three-dimensional lattice motion. Analysis of the size, speed, and symmetry of the lattice motion, together with ab initio calculations accounting for the stresses due to electrons and phonons, allow us to reveal the magnetoelastic stress generated by demagnetization., Correction in: Nature Communications, vol. 9, article number: 1035. DOI: 10.1038/s41467-018-03389-4

Published
2018
Full Text
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8. Publisher Correction : Beyond a phenomenological description of magnetostriction

Author

Reid, A. H., Shen, X., Maldonado, Pablo, Chase, T., Jal, E., Granitzka, P. W., Carva, K., Li, R. K., Li, J., Wu, L., Vecchione, T., Liu, T., Chen, Z., Higley, D. J., Hartmann, N., Coffee, R., Wu, J., Dakowski, G. L., Schlotter, W. F., Ohldag, H., Takahashi, Y. K., Mehta, V., Hellwig, O., Fry, A., Zhu, Y., Cao, J., Fullerton, E. E., Stohr, J., Oppeneer, Peter M., Wang, X. J., Dürr, Hermann A., Reid, A. H., Shen, X., Maldonado, Pablo, Chase, T., Jal, E., Granitzka, P. W., Carva, K., Li, R. K., Li, J., Wu, L., Vecchione, T., Liu, T., Chen, Z., Higley, D. J., Hartmann, N., Coffee, R., Wu, J., Dakowski, G. L., Schlotter, W. F., Ohldag, H., Takahashi, Y. K., Mehta, V., Hellwig, O., Fry, A., Zhu, Y., Cao, J., Fullerton, E. E., Stohr, J., Oppeneer, Peter M., Wang, X. J., and Dürr, Hermann A.

Abstract

WoS title: Beyond a phenomenological description of magnetostriction (vol 9, 388, 2018)Correction to: Nature Communications, vol. 9, article number: 388. DOI: 10.1038/s41467-017-02730-7

Published
2018
Full Text
View/download PDF

9. Beyond a phenomenological description of magnetostriction

Author

Reid, A. H., Shen, X., Maldonado, Pablo, Chase, T., Jal, E., Granitzka, P. W., Carva, K., Li, R. K., Li, J., Wu, L., Vecchione, T., Liu, T., Chen, Z., Higley, D. J., Hartmann, N., Coffee, R., Wu, J., Dakovski, G. L., Schlotter, W. F., Ohldag, H., Takahashi, Y. K., Mehta, V., Hellwig, O., Fry, A., Zhu, Y., Cao, J., Fullerton, E. E., Stohr, J., Oppeneer, Peter M., Wang, X. J., Dürr, Hermann, Reid, A. H., Shen, X., Maldonado, Pablo, Chase, T., Jal, E., Granitzka, P. W., Carva, K., Li, R. K., Li, J., Wu, L., Vecchione, T., Liu, T., Chen, Z., Higley, D. J., Hartmann, N., Coffee, R., Wu, J., Dakovski, G. L., Schlotter, W. F., Ohldag, H., Takahashi, Y. K., Mehta, V., Hellwig, O., Fry, A., Zhu, Y., Cao, J., Fullerton, E. E., Stohr, J., Oppeneer, Peter M., Wang, X. J., and Dürr, Hermann

Abstract

Magnetostriction, the strain induced by a change in magnetization, is a universal effect in magnetic materials. Owing to the difficulty in unraveling its microscopic origin, it has been largely treated phenomenologically. Here, we show how the source of magnetostriction-the underlying magnetoelastic stress-can be separated in the time domain, opening the door for an atomistic understanding. X-ray and electron diffraction are used to separate the subpicosecond spin and lattice responses of FePt nanoparticles. Following excitation with a 50-fs laser pulse, time-resolved X-ray diffraction demonstrates that magnetic order is lost within the nanoparticles with a time constant of 146 fs. Ultrafast electron diffraction reveals that this demagnetization is followed by an anisotropic, three-dimensional lattice motion. Analysis of the size, speed, and symmetry of the lattice motion, together with ab initio calculations accounting for the stresses due to electrons and phonons, allow us to reveal the magnetoelastic stress generated by demagnetization., Correction in: Nature Communications, vol. 9, article number: 1035. DOI: 10.1038/s41467-018-03389-4

Published
2018
Full Text
View/download PDF

10. Publisher Correction : Beyond a phenomenological description of magnetostriction

Author

Reid, A. H., Shen, X., Maldonado, Pablo, Chase, T., Jal, E., Granitzka, P. W., Carva, K., Li, R. K., Li, J., Wu, L., Vecchione, T., Liu, T., Chen, Z., Higley, D. J., Hartmann, N., Coffee, R., Wu, J., Dakowski, G. L., Schlotter, W. F., Ohldag, H., Takahashi, Y. K., Mehta, V., Hellwig, O., Fry, A., Zhu, Y., Cao, J., Fullerton, E. E., Stohr, J., Oppeneer, Peter M., Wang, X. J., Dürr, Hermann A., Reid, A. H., Shen, X., Maldonado, Pablo, Chase, T., Jal, E., Granitzka, P. W., Carva, K., Li, R. K., Li, J., Wu, L., Vecchione, T., Liu, T., Chen, Z., Higley, D. J., Hartmann, N., Coffee, R., Wu, J., Dakowski, G. L., Schlotter, W. F., Ohldag, H., Takahashi, Y. K., Mehta, V., Hellwig, O., Fry, A., Zhu, Y., Cao, J., Fullerton, E. E., Stohr, J., Oppeneer, Peter M., Wang, X. J., and Dürr, Hermann A.

Abstract

WoS title: Beyond a phenomenological description of magnetostriction (vol 9, 388, 2018)Correction to: Nature Communications, vol. 9, article number: 388. DOI: 10.1038/s41467-017-02730-7

Published
2018
Full Text
View/download PDF

11. Beyond a phenomenological description of magnetostriction

Author

Reid, A. H., Shen, X., Maldonado, Pablo, Chase, T., Jal, E., Granitzka, P. W., Carva, K., Li, R. K., Li, J., Wu, L., Vecchione, T., Liu, T., Chen, Z., Higley, D. J., Hartmann, N., Coffee, R., Wu, J., Dakovski, G. L., Schlotter, W. F., Ohldag, H., Takahashi, Y. K., Mehta, V., Hellwig, O., Fry, A., Zhu, Y., Cao, J., Fullerton, E. E., Stohr, J., Oppeneer, Peter M., Wang, X. J., Dürr, Hermann, Reid, A. H., Shen, X., Maldonado, Pablo, Chase, T., Jal, E., Granitzka, P. W., Carva, K., Li, R. K., Li, J., Wu, L., Vecchione, T., Liu, T., Chen, Z., Higley, D. J., Hartmann, N., Coffee, R., Wu, J., Dakovski, G. L., Schlotter, W. F., Ohldag, H., Takahashi, Y. K., Mehta, V., Hellwig, O., Fry, A., Zhu, Y., Cao, J., Fullerton, E. E., Stohr, J., Oppeneer, Peter M., Wang, X. J., and Dürr, Hermann

Abstract

Magnetostriction, the strain induced by a change in magnetization, is a universal effect in magnetic materials. Owing to the difficulty in unraveling its microscopic origin, it has been largely treated phenomenologically. Here, we show how the source of magnetostriction-the underlying magnetoelastic stress-can be separated in the time domain, opening the door for an atomistic understanding. X-ray and electron diffraction are used to separate the subpicosecond spin and lattice responses of FePt nanoparticles. Following excitation with a 50-fs laser pulse, time-resolved X-ray diffraction demonstrates that magnetic order is lost within the nanoparticles with a time constant of 146 fs. Ultrafast electron diffraction reveals that this demagnetization is followed by an anisotropic, three-dimensional lattice motion. Analysis of the size, speed, and symmetry of the lattice motion, together with ab initio calculations accounting for the stresses due to electrons and phonons, allow us to reveal the magnetoelastic stress generated by demagnetization., Correction in: Nature Communications, vol. 9, article number: 1035. DOI: 10.1038/s41467-018-03389-4

Published
2018
Full Text
View/download PDF

12. Publisher Correction : Beyond a phenomenological description of magnetostriction

Author

Reid, A. H., Shen, X., Maldonado, Pablo, Chase, T., Jal, E., Granitzka, P. W., Carva, K., Li, R. K., Li, J., Wu, L., Vecchione, T., Liu, T., Chen, Z., Higley, D. J., Hartmann, N., Coffee, R., Wu, J., Dakowski, G. L., Schlotter, W. F., Ohldag, H., Takahashi, Y. K., Mehta, V., Hellwig, O., Fry, A., Zhu, Y., Cao, J., Fullerton, E. E., Stohr, J., Oppeneer, Peter M., Wang, X. J., Dürr, Hermann A., Reid, A. H., Shen, X., Maldonado, Pablo, Chase, T., Jal, E., Granitzka, P. W., Carva, K., Li, R. K., Li, J., Wu, L., Vecchione, T., Liu, T., Chen, Z., Higley, D. J., Hartmann, N., Coffee, R., Wu, J., Dakowski, G. L., Schlotter, W. F., Ohldag, H., Takahashi, Y. K., Mehta, V., Hellwig, O., Fry, A., Zhu, Y., Cao, J., Fullerton, E. E., Stohr, J., Oppeneer, Peter M., Wang, X. J., and Dürr, Hermann A.

Abstract

WoS title: Beyond a phenomenological description of magnetostriction (vol 9, 388, 2018)Correction to: Nature Communications, vol. 9, article number: 388. DOI: 10.1038/s41467-017-02730-7

Published
2018
Full Text
View/download PDF

13. Beyond a phenomenological description of magnetostriction

Author

Reid, A. H., Shen, X., Maldonado, Pablo, Chase, T., Jal, E., Granitzka, P. W., Carva, K., Li, R. K., Li, J., Wu, L., Vecchione, T., Liu, T., Chen, Z., Higley, D. J., Hartmann, N., Coffee, R., Wu, J., Dakovski, G. L., Schlotter, W. F., Ohldag, H., Takahashi, Y. K., Mehta, V., Hellwig, O., Fry, A., Zhu, Y., Cao, J., Fullerton, E. E., Stohr, J., Oppeneer, Peter M., Wang, X. J., Dürr, Hermann, Reid, A. H., Shen, X., Maldonado, Pablo, Chase, T., Jal, E., Granitzka, P. W., Carva, K., Li, R. K., Li, J., Wu, L., Vecchione, T., Liu, T., Chen, Z., Higley, D. J., Hartmann, N., Coffee, R., Wu, J., Dakovski, G. L., Schlotter, W. F., Ohldag, H., Takahashi, Y. K., Mehta, V., Hellwig, O., Fry, A., Zhu, Y., Cao, J., Fullerton, E. E., Stohr, J., Oppeneer, Peter M., Wang, X. J., and Dürr, Hermann

Abstract

Magnetostriction, the strain induced by a change in magnetization, is a universal effect in magnetic materials. Owing to the difficulty in unraveling its microscopic origin, it has been largely treated phenomenologically. Here, we show how the source of magnetostriction-the underlying magnetoelastic stress-can be separated in the time domain, opening the door for an atomistic understanding. X-ray and electron diffraction are used to separate the subpicosecond spin and lattice responses of FePt nanoparticles. Following excitation with a 50-fs laser pulse, time-resolved X-ray diffraction demonstrates that magnetic order is lost within the nanoparticles with a time constant of 146 fs. Ultrafast electron diffraction reveals that this demagnetization is followed by an anisotropic, three-dimensional lattice motion. Analysis of the size, speed, and symmetry of the lattice motion, together with ab initio calculations accounting for the stresses due to electrons and phonons, allow us to reveal the magnetoelastic stress generated by demagnetization., Correction in: Nature Communications, vol. 9, article number: 1035. DOI: 10.1038/s41467-018-03389-4

Published
2018
Full Text
View/download PDF

14. Publisher Correction : Beyond a phenomenological description of magnetostriction

Author

Reid, A. H., Shen, X., Maldonado, Pablo, Chase, T., Jal, E., Granitzka, P. W., Carva, K., Li, R. K., Li, J., Wu, L., Vecchione, T., Liu, T., Chen, Z., Higley, D. J., Hartmann, N., Coffee, R., Wu, J., Dakowski, G. L., Schlotter, W. F., Ohldag, H., Takahashi, Y. K., Mehta, V., Hellwig, O., Fry, A., Zhu, Y., Cao, J., Fullerton, E. E., Stohr, J., Oppeneer, Peter M., Wang, X. J., Dürr, Hermann A., Reid, A. H., Shen, X., Maldonado, Pablo, Chase, T., Jal, E., Granitzka, P. W., Carva, K., Li, R. K., Li, J., Wu, L., Vecchione, T., Liu, T., Chen, Z., Higley, D. J., Hartmann, N., Coffee, R., Wu, J., Dakowski, G. L., Schlotter, W. F., Ohldag, H., Takahashi, Y. K., Mehta, V., Hellwig, O., Fry, A., Zhu, Y., Cao, J., Fullerton, E. E., Stohr, J., Oppeneer, Peter M., Wang, X. J., and Dürr, Hermann A.

Abstract

WoS title: Beyond a phenomenological description of magnetostriction (vol 9, 388, 2018)Correction to: Nature Communications, vol. 9, article number: 388. DOI: 10.1038/s41467-017-02730-7

Published
2018
Full Text
View/download PDF

15. Beyond a phenomenological description of magnetostriction

Author

Reid, A. H., Shen, X., Maldonado, Pablo, Chase, T., Jal, E., Granitzka, P. W., Carva, K., Li, R. K., Li, J., Wu, L., Vecchione, T., Liu, T., Chen, Z., Higley, D. J., Hartmann, N., Coffee, R., Wu, J., Dakovski, G. L., Schlotter, W. F., Ohldag, H., Takahashi, Y. K., Mehta, V., Hellwig, O., Fry, A., Zhu, Y., Cao, J., Fullerton, E. E., Stohr, J., Oppeneer, Peter M., Wang, X. J., Dürr, Hermann, Reid, A. H., Shen, X., Maldonado, Pablo, Chase, T., Jal, E., Granitzka, P. W., Carva, K., Li, R. K., Li, J., Wu, L., Vecchione, T., Liu, T., Chen, Z., Higley, D. J., Hartmann, N., Coffee, R., Wu, J., Dakovski, G. L., Schlotter, W. F., Ohldag, H., Takahashi, Y. K., Mehta, V., Hellwig, O., Fry, A., Zhu, Y., Cao, J., Fullerton, E. E., Stohr, J., Oppeneer, Peter M., Wang, X. J., and Dürr, Hermann

Abstract

Magnetostriction, the strain induced by a change in magnetization, is a universal effect in magnetic materials. Owing to the difficulty in unraveling its microscopic origin, it has been largely treated phenomenologically. Here, we show how the source of magnetostriction-the underlying magnetoelastic stress-can be separated in the time domain, opening the door for an atomistic understanding. X-ray and electron diffraction are used to separate the subpicosecond spin and lattice responses of FePt nanoparticles. Following excitation with a 50-fs laser pulse, time-resolved X-ray diffraction demonstrates that magnetic order is lost within the nanoparticles with a time constant of 146 fs. Ultrafast electron diffraction reveals that this demagnetization is followed by an anisotropic, three-dimensional lattice motion. Analysis of the size, speed, and symmetry of the lattice motion, together with ab initio calculations accounting for the stresses due to electrons and phonons, allow us to reveal the magnetoelastic stress generated by demagnetization., Correction in: Nature Communications, vol. 9, article number: 1035. DOI: 10.1038/s41467-018-03389-4

Published
2018
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