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250 results on '"Tol, J."'

4. MRI-guided optimisation of neoadjuvant chemotherapy duration in stage II–III HER2-positive breast cancer (TRAIN-3): a multicentre, single-arm, phase 2 study

Author

van Leeuwen-Stok, E., van Leeuwen, L., de Graaf, H., van Riel, J.M.G.H., Houtsma, D., Vrijaldenhoven, S., van der Velden, A.W.G., Peerdeman, A.L., van den Brink - Schimmel, R.J., Drooger, J.C., Imholz, A.L.Th., Dercksen, M.W., Oulad Hadj, J., Bakker, S.D., van der Wouw, A.J., Kerver, E.D., Bouma, G., van Schaik, C., de Boer, M., Mandigers, C.M.P.W., Koornstra, R.H.T., Smals, A., Rietbroek, R.C., van der Padt - Pruijsten, A., den Boer, M.O., Bos, H., Schiphorst, P.P.J.B.M., Vriens, B.E.P.J., van Rossum, Q.C., Tol, J., Hoogwerf - Kluft, D., Kruijtzer - Schimmel, C.M.F., Oosterkamp, H.M., Baas, I.O., Dietvorst, A.H.P., Davidis - van Schoonhoven, M., van Dijk, M.A., van der Voort, Anna, Louis, Fleur M, van Ramshorst, Mette S, Kessels, Rob, Mandjes, Ingrid A, Kemper, Inge, Agterof, Mariette J, van der Steeg, Wim A, Heijns, Joan B, van Bekkum, Marlies L, Siemerink, Ester J, Kuijer, Philomeen M, Scholten, Astrid, Wesseling, Jelle, Vrancken Peeters, Marie-Jeanne T F D, Mann, Ritse M, and Sonke, Gabe S

Published
2024
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12. Molecular imaging as a tool to investigate heterogeneity of advanced HER2-positive breast cancer and to predict patient outcome under trastuzumab emtansine (T-DM1): the ZEPHIR trial

Author

Gebhart, G., Lamberts, L.E., Wimana, Z., Garcia, C., Emonts, P., Ameye, L., Stroobants, S., Huizing, M., Aftimos, P., Tol, J., Oyen, W.J.G., Vugts, D.J., Hoekstra, O.S., Schröder, C.P., Menke-van der Houven van Oordt, C.W., Guiot, T., Brouwers, A.H., Awada, A., de Vries, E.G.E., and Flamen, P.

Published
2016
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13. 2D correlations in the van der Waals ferromagnet CrBr3 using high frequency electron spin resonance spectroscopy.

Author

Saiz, C. L., Delgado, J. A., van Tol, J., Tartaglia, T., Tafti, F., and Singamaneni, S. R.

Subjects
ELECTRON paramagnetic resonance spectroscopy, ELECTRON paramagnetic resonance, FERROMAGNETIC materials, VAN der Waals forces, MAGNETIC traps, MAGNETIC fields
Abstract

Broadening the knowledge and understanding on the magnetic correlations in van der Waals layered magnets is critical in realizing their potential next-generation magneto-electronic applications. In this study, we employ high-frequency (ν = 240 GHz) electron spin resonance (ESR) spectroscopy on plate-like quasi two-dimensional (2D) CrBr3 to gain insight into the magnetic interactions as a function of temperature (4–200 K) and the angle of rotation. We find that the temperature dependence of the ESR linewidth is well described by the Ginzburg–Landau critical model, indicative of the presence of 2D correlations. Furthermore, our findings show that the resonance field follows a (3 cos 2 θ − 1) -like angular dependence, while the linewidth follows a (3 cos 2 θ − 1) 2 -like angular dependence, a behavior indicative of 2D correlations that are likely due to the interaction of the external magnetic field applied during the ESR experiment. This study demonstrates the significance of employing spin sensitive techniques such as ESR to better understand the magnetic correlations in similar van der Waals magnets. [ABSTRACT FROM AUTHOR]

Published
2021
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15. Quantum dynamics of Mn2+ in dimethylammonium magnesium formate.

Author

Orio, M., Bindra, J. K., van Tol, J., Giorgi, M., Dalal, N. S., and Bertaina, S.

Subjects
QUANTUM theory, ELECTRON paramagnetic resonance, RABI oscillations, MAGNETIC structure, MAGNESIUM
Abstract

Dimethylammonium magnesium formate, [ ( C H 3 ) 2 N H 2 ][Mg(HCOO)3] or DMAMgF, is a model used to study high temperature hybrid perovskite-like dielectrics. This compound displays an order–disorder phase transition at about 260 K. Using multifrequency electron spin resonance in continuous wave and pulsed modes, we herein present the quantum dynamics of the Mn2+ ion probe in DMAMgF. In the high temperature paraelectric phase, we observe a large distribution of the zero field splitting that is attributed to the high local disorder and further supported by density functional theory computations. In the low temperature ferroelastic phase, a single structure phase is detected and shown to contain two magnetic structures. The complex electron paramagnetic resonance signals were identified by means of the Rabi oscillation method combined with the crystal field kernel density estimation. [ABSTRACT FROM AUTHOR]

Published
2021
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26. Pulsed electron paramagnetic resonance spectroscopy powered by a free-electron laser

Author

Takahashi, S., Brunei, L.-C., Edwards, D.T., van Tol, J., Ramian, G., Han, S., and Sherwin, M.S.

Subjects
Lasers -- Usage -- Observations, Laser beams -- Research, Spectrum analysis -- Research, Laser, Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

Electron paramagnetic resonance (EPR) spectroscopy interrogates unpaired electron spins in solids and liquids to reveal local structure and dynamics; for example, EPR has elucidated parts of the structure of protein [...]

Published
2012
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28. Decoherence in crystals of quantum molecular magnets

Author

Takahashi, S., Tupitsyn, I.S., van Tol, J., Beedle, C.C., Hendrickson, D.N., and Stamp, P.C.E.

Subjects
Crystals -- Electric properties -- Atomic properties, Magnets -- Atomic properties -- Electric properties, Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

Quantum decoherence is a central concept in physics. Applications such as quantum information processing depend on understanding it; there are even fundamental theories proposed that go beyond quantum mechanics (1-3), in which the breakdown of quantum theory would appear as an 'intrinsic' decoherence, mimicking the more familiar environmental decoherence processes (4). Such applications cannot be optimized, and such theories cannot be tested, until we have a firm handle on ordinary environmental decoherence processes. Here we show that the theory for insulating electronic spin systems can make accurate and testable predictions for environmental decoherence in molecular-based quantum magnets (5). Experiments on molecular magnets have successfully demonstrated quantum-coherent phenomena (6-8) but the decoherence processes that ultimately limit such behaviour were not well constrained. For molecular magnets, theory predicts three principal contributions to environmental decoherence: from phonons, from nuclear spins and from intermolecular dipolar interactions. We use high magnetic fields on single crystals of [Fe.sub.8] molecular magnets (in which the Fe ions are surrounded by organic ligands) to suppress dipolar and nuclear-spin decoherence. In these high-field experiments, we find that the decoherence time varies strongly as a function of temperature and magnetic field. The theoretical predictions are fully verified experimentally, and there are no other visible decoherence sources. In these high fields, we obtain a maximum decoherence quality-factor of 1.49 x [10.sup.6]; our investigation suggests that the environmental decoherence time can be extended up to about 500 microseconds, with a decoherence quality factor of ~6 x [10.sup.7], by optimizing the temperature, magnetic field and nuclear isotopic concentrations., Environmental decoherence processes are reasonably well understood at the atomic scale (9) (although some poorly understood noisy sources remain (10)). However both quantum information processing, and the fundamental tests noted [...]

Published
2011
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29. Electronic spin storage in an electrically readable nuclear spin memory with a lifetime >100 seconds

Author

McCamey, D.R., Van Tol, J., Morley, G.W., and Boehme, C.

Subjects
Electron spin -- Research, Silicon -- Atomic properties, Phosphorus -- Atomic properties, Science and technology
Abstract

Electron spins are strong candidates with which to implement spintronics because they are both mobile and able to be manipulated. The relatively short lifetimes of electron spins, however, present a problem for the long-term storage of spin information. We demonstrated an ensemble nuclear spin memory in phosphorous-doped silicon, which can be read out electrically and has a lifetime exceeding 100 seconds. The electronic spin information can be mapped onto and stored in the nuclear spin of the phosphorus donors, and the nuclear spins can then be repetitively read out electrically for time periods that exceed the electron spin lifetime. We discuss how this memory can be used in conjunction with other silicon spintronic devices. 10.1126/science.1197931

Published
2010
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