INFIQC 05475
INSTITUTO DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Unidad Ejecutora - UE
artículos
Título:
Magnetic anisotropy and valence states in L a2 C o1-x M n1+x O6 (x≈0.23) thin films studied by x-ray absorption spectroscopy techniques
Autor/es:
GALCERAN, REGINA; CISNEROS-FERNÁNDEZ, JOSÉ; HERRERO-MARTÍN, JAVIER; BALCELLS, LLUÍS; LÓPEZ-MIR, LAURA; PANNUNZIO MINER, ELISA V.; BOZZO, BERNAT; MARTÍNEZ, BENJAMÍN; POMAR, ALBERTO; FRONTERA, CARLOS
Revista:
Physical Review B
Editorial:
American Physical Society
Referencias:
Año: 2017 vol. 95
ISSN:
2469-9950
Resumen:
X-ray absorption spectroscopy was used to determine the valence state in La2Co1-xMn1+xO6 (x≈0.23) thin films. We found that in spite of the nonstoichiometry, 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) cell parameters get expanded (compressed). This behavior is reproduced by first order perturbation theory calculations.
