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Título:
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Magnetic anisotropy in Cr_(2)GeC investigated by X-ray magnetic circular dichroism and ab initio calculations
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Autores:
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Magnuson, Martin ;
Mattesini, Maurizio
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Tipo de documento:
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texto impreso
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Editorial:
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Elsevier Science BV, 2020-05-01
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Física atmosférica
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Tipo = Artículo
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Resumen:
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The magnetism in the inherently nanolaminated ternary MAX-phase Cr_(2)GeC 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 Cr_(2)GeC magnetic properties.
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En línea:
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https://eprints.ucm.es/60037/1/MattesiniM%2006%20preprint.pdf
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