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Calculated magneto-optical Kerr spectra of the half-Heusler compounds AuMnX (X = In, Sn, Sb)
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
2007 (English)In: Journal of Physics: Condensed Matter, ISSN 0953-8984, E-ISSN 1361-648X, Vol. 19, no 31, 315216- p.Article in journal (Refereed) Published
Abstract [en]

The ferromagnetic ground states of the half-Heusler compounds AuMnX (X ≤ In, Sn, Sb) have been calculated in the framework of the local spin-density approximation (LSDA) to density functional theory (DFT). AuMnSn is computed to be a half-metallic ferromagnet, whereas AuMnIn and AuMnSb are not half-metallic, due to their different band filling. The computed relativistic electronic structures served as inputs to calculate the magneto-optical Kerr rotations and ellipticities for all three materials. In the case of AuMnSn the largest, zero-temperature, polar Kerr rotation has been found to be -0.45° at about 1eV photon energy. The computed MOKE spectra of AuMnSn are in qualitative agreement with recent experiments. The largest Kerr rotations of AuMnIn and AuMnSb have been calculated to be +0.64° at 4.3eV and -0.85° at 0.9eV, respectively.

Place, publisher, year, edition, pages
2007. Vol. 19, no 31, 315216- p.
Keyword [en]
magneto-optical Kerr effect, half-Heusler
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-16486DOI: 10.1088/0953-8984/19/31/315216ISI: 000248185700017OAI: oai:DiVA.org:uu-16486DiVA: diva2:44257
Available from: 2008-05-26 Created: 2008-05-26 Last updated: 2017-12-08Bibliographically approved

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Amft, MartinOppeneer, Peter M.

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