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Your search keyword '"Maccherozzi, F."' showing total 19 results
Start Over Author "Maccherozzi, F." Journal physical review b
19 results on '"Maccherozzi, F."'

1. Phase coexistence and transitions between antiferromagnetic and ferromagnetic states in a synthetic antiferromagnet

Author

Barker, C. E. A., primary, Fallon, K., additional, Barton, C., additional, Haltz, E., additional, Almeida, T. P., additional, Villa, S., additional, Kirkbride, C., additional, Maccherozzi, F., additional, Sarpi, B., additional, Dhesi, S. S., additional, McGrouther, D., additional, McVitie, S., additional, Moore, T. A., additional, Kazakova, O., additional, and Marrows, C. H., additional

Published
2024
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2. Identifying the domain-wall spin structure in antiferromagnetic NiO/Pt

Author

Schmitt, C., primary, Sanchez-Tejerina, L., additional, Filianina, M., additional, Fuhrmann, F., additional, Meer, H., additional, Ramos, R., additional, Maccherozzi, F., additional, Backes, D., additional, Saitoh, E., additional, Finocchio, G., additional, Baldrati, L., additional, and Kläui, M., additional

Published
2023
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4. Spin flop and crystalline anisotropic magnetoresistance in CuMnAs

Author

Wang, M., primary, Andrews, C., additional, Reimers, S., additional, Amin, O. J., additional, Wadley, P., additional, Campion, R. P., additional, Poole, S. F., additional, Felton, J., additional, Edmonds, K. W., additional, Gallagher, B. L., additional, Rushforth, A. W., additional, Makarovsky, O., additional, Gas, K., additional, Sawicki, M., additional, Kriegner, D., additional, Zubáč, J., additional, Olejník, K., additional, Novák, V., additional, Jungwirth, T., additional, Shahrokhvand, M., additional, Zeitler, U., additional, Dhesi, S. S., additional, and Maccherozzi, F., additional

Published
2020
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6. Magnetic imaging of antiferromagnetic and superconducting phases in RbxFe2−ySe2 crystals

Author

Hazi, J, Mousavi, T, Dudin, P, van der Laan, G, Maccherozzi, F, Krzton-Maziopa, A, Pomjakushina, E, Conder, K, and Speller, S

Subjects
Condensed Matter::Superconductivity
Abstract

High temperature superconducting (HTS) cuprate materials, with the ability to carry large electrical currents with no resistance at easily reachable temperatures, have stimulated enormous scientific and industrial interest since their discovery in the 1980s. However, technological applications of these promising compounds have been limited by their chemical and microstructural complexity and the challenging processing strategies required for exploitation of their extraordinary properties. The lack of theoretical understanding of the mechanism for superconductivity in these HTS materials has also hindered the search for new superconducting systems with enhanced performance. The unexpected discovery in 2008 of HTS iron-based compounds has provided an entirely new family of materials for studying the crucial interplay between superconductivity and magnetism in unconventional superconductors. Alkali metal doped iron selenide (AxFe2-ySe2, A=alkali metal) compounds are of particular interest owing the co-existence of superconductivity at relatively high temperature with antiferromagnetism. Intrinsic phase separation on the mesoscopic scale is also known to occur in what were intended to be single crystals of these compounds, making it difficult to interpret bulk property measurements. Here we use a combination of two advanced microscopy techniques to provide the first direct evidence of the magnetic properties of the individual phases. Firstly, x-ray linear dichroism (XLD) studies in a photoelectron emission microscope (PEEM), and supporting multiplet calculations, indicate that the matrix (majority) phase is antiferromagnetic whereas the minority phase is non-magnetic at room temperature. Secondly, cryogenic magnetic force microscopy (MFM) demonstrates unambiguously that superconductivity occurs only in the minority phase. Correlation of these findings with previous microstructural studies and bulk measurements paves the way for understanding the intriguing electronic and magnetic properties of these compounds.

Published
2018

9. Electronic structure of Fe and Co magnetic adatoms on Bi2Te3 surfaces

Author

Shelford, L, Hesjedal, T, Collins-McIntyre, L, Dhesi, S, Maccherozzi, F, and van der Laan, G

Subjects
Condensed Matter::Materials Science
Abstract

Magnetic doping of topological insulators (TIs) is a prerequisite for their application as spin-based devices. Using x-ray magnetic circular dichroism (XMCD) we investigate the influence of an ultralow coverage (∼0.5% of a monolayer) of magnetic atoms on a TI substrate. For Fe and Co adatoms on Bi 2Te 3 at ∼1.5 K we find an orbital-to-spin magnetic moment ratio of ∼0.45. The magnetization curve of the Fe atoms recorded by XMCD is in quantitative agreement with a paramagnetic behavior with no indication of long-range magnetic order. The spectral shape of the XMCD indicates that the adatoms are weakly hybridized with the substrate and form narrowband states. The results show that the adatoms are not capable of breaking time-reversal symmetry. © 2012 American Physical Society.

Published
2012

11. Role of B diffusion in the interfacial Dzyaloshinskii-Moriya interaction inTa/Co20Fe60B20/MgOnanowires

Author

Lo Conte, R., primary, Martinez, E., additional, Hrabec, A., additional, Lamperti, A., additional, Schulz, T., additional, Nasi, L., additional, Lazzarini, L., additional, Mantovan, R., additional, Maccherozzi, F., additional, Dhesi, S. S., additional, Ocker, B., additional, Marrows, C. H., additional, Moore, T. A., additional, and Kläui, M., additional

Published
2015
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13. Current-induced motion and pinning of domain walls in spin-valve nanowires studied by XMCD-PEEM

Author

Uhlíř, V., primary, Pizzini, S., additional, Rougemaille, N., additional, Novotný, J., additional, Cros, V., additional, Jiménez, E., additional, Faini, G., additional, Heyne, L., additional, Sirotti, F., additional, Tieg, C., additional, Bendounan, A., additional, Maccherozzi, F., additional, Belkhou, R., additional, Grollier, J., additional, Anane, A., additional, and Vogel, J., additional

Published
2010
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14. Identifying the character of ferromagnetic Mn in epitaxial Fe/(Ga,Mn)As heterostructures

Author

Sperl, M., primary, Maccherozzi, F., additional, Borgatti, F., additional, Verna, A., additional, Rossi, G., additional, Soda, M., additional, Schuh, D., additional, Bayreuther, G., additional, Wegscheider, W., additional, Cezar, J. C., additional, Yakhou, F., additional, Brookes, N. B., additional, Back, C. H., additional, and Panaccione, G., additional

Published
2010
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