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05-12-2016 | Original Paper

Long-range magnetic interaction in Mn\(_{x}\)Ge\(_{1-x}\): structural, spectromicroscopic and magnetic investigations

Authors: Liviu Cristian Tănase, George-Adrian Lungu, Laura Elena Abramiuc, Ioana Cristina Bucur, Nicoleta Georgiana Apostol, Ruxandra Maria Costescu, Cristian-Alexandru Tache, Dan Macovei, Alexey Barinov, Cristian-Mihail Teodorescu

Published in: Journal of Materials Science | Issue 6/2017

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Abstract

We report the structural, electronic and magnetic investigation using extended X-ray absorption fine structure spectroscopy (EXAFS), photoelectron microscopy, spin-resolved photoemission and magneto-optical Kerr effect on the properties of Mn\(_{x}\)Ge\(_{1-x}\) systems obtained by molecular beam epitaxy deposition of manganese on Ge(001) wafers annealed on temperatures between 50 and 450 \(^{\circ }\)C. Magnetic ordering can be achieved when the substrate temperature is higher than 250 \(^{\circ }\)C, when the manganese tends to diffuse into the Ge matrix and segregate in Mn\(_{5}\)Ge\(_{3}\)-like compounds, as proved by EXAFS. High spatial resolution photoelectron spectroscopy reveals Mn inhomogeneities in the 5–10 \(\upmu \)m range, even though Mn is found mostly in the same chemical state all over the surface.

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Title: Long-range magnetic interaction in MnGe: structural, spectromicroscopic and magnetic investigations
Authors: Liviu Cristian Tănase
George-Adrian Lungu
Laura Elena Abramiuc
Ioana Cristina Bucur
Nicoleta Georgiana Apostol
Ruxandra Maria Costescu
Cristian-Alexandru Tache
Dan Macovei
Alexey Barinov
Cristian-Mihail Teodorescu
Publication date: 05-12-2016
Publisher: Springer US
Published in: Journal of Materials Science / Issue 6/2017
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI: https://doi.org/10.1007/s10853-016-0618-9

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