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Magnetic anisotropy in Cr2GeC investigated by X-ray magnetic circular dichroism and ab initio calculations
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-0317-0190
Department of Earth’s Physics and Astrophysics, Complutense University of Madrid, Madrid E-28040, Spain.
2020 (English)In: Journal of Magnetism and Magnetic Materials, ISSN 0304-8853, E-ISSN 1873-4766, Vol. 501, article id 166470Article in journal (Refereed) Published
Abstract [en]

The magnetism in the inherently nanolaminated ternary MAX-phase Cr2GeC is investigated by element-selective, polarization and temperature-dependent, soft X-ray absorption spectroscopy and X-ray magnetic circular dichroism. The measurements indicate an antiferro-magnetic Cr-Cr coupling along the c-axis of the hexagonal structure modulated by a ferromagnetic ordering in the nanolaminated ab-basal planes. The weak chromium magnetic moments are an order of magnitude stronger in the nanolaminated planes than along the vertical axis. Theoretically, a small but notable, non-spin-collinear component explains the existence of a non-perfect spin compensation along the c-axis. As shown in this work, this spin distortion generates an overall residual spin moment inside the unit cell resembling that of a ferri-magnet. Due to the different competing magnetic interactions, electron correlations and temperature effects both need to be considered to achieve a correct theoretical description of the Cr2GeC magnetic properties.

Place, publisher, year, edition, pages
Elsevier, 2020. Vol. 501, article id 166470
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:liu:diva-163499DOI: 10.1016/j.jmmm.2020.166470OAI: oai:DiVA.org:liu-163499DiVA, id: diva2:1392021
Available from: 2020-02-06 Created: 2020-02-06 Last updated: 2020-02-06Bibliographically approved

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Available from 2022-05-01 08:00

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