Magnetic anisotropy and valence states in La$_2$Co$_{1-x}$Mn$_{1+x}$O$_6$ ($x\approx 0.23$) thin films studied by X-ray absorption spectroscopy techniques

Laura López-Mir; Regina Galceran; Javier Herrero-Martín; Bernat Bozzo; José Cisneros-Fernández; Elisa V. Pannunzio Miner; Lluís Balcells; Benjamín Martínez; Carlos Frontera

doi:10.1103/PhysRevB.95.224434

paper

Magnetic anisotropy and valence states in La $_{2}$ Co $_{1 - x}$ Mn $_{1 + x}$ O $_{6}$ ( $x \approx 0.23$ ) thin films studied by X-ray absorption spectroscopy techniques

arXiv:1704.06411 · doi:10.1103/PhysRevB.95.224434

Abstract

X-ray absorption spectroscopy was used to determine the valence state in La $_{2}$ Co $_{1 - x}$ Mn $_{1 + x}$ O $_{6}$ ( $x \approx 0.23$ ) thin films. We found that in spite of the non-stoichiometry, Co is in a divalent state while Mn ions show a mixed valence state. The relation of this finding with the magnetic properties of the films is discussed. X-ray magnetic circular dichroism measurements prove that magnetic anisotropy originates from Co spin-orbit coupling and it is strain-dependent: a strong increase of the angular contribution to the magnetic moment is found when in-plane (out-of-plane) and cell parameters get expanded (compressed). This behavior is reproduced by first order perturbation theory calculations.

Magnetic anisotropy and valence states in La $_{2}$ Co $_{1 - x}$ Mn $_{1 + x}$ O $_{6}$ ( $x \approx 0.23$ ) thin films studied by X-ray absorption spectroscopy techniques

Abstract

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Magnetic anisotropy and valence states in La2​Co1−x​Mn1+x​O6​ (x≈0.23) thin films studied by X-ray absorption spectroscopy techniques

Abstract

References in corpus (5)

Cited by in corpus (5)

Magnetic anisotropy and valence states in La $_{2}$ Co $_{1 - x}$ Mn $_{1 + x}$ O $_{6}$ ( $x \approx 0.23$ ) thin films studied by X-ray absorption spectroscopy techniques