We have performed x-ray linear and circular magnetic dichroism experiments at the Mn L-2,L-3 edge of the La0.7Sr0.3MnO3 ultrathin films. Our measurements show that the antiferromagnetic (AF) insulating phase is stabilized by the interfacial rearrangement of the Mn 3d orbitals, despite the relevant magnetostriction anisotropic effect on the double-exchange ferromagnetic (FM) metallic phase. As a consequence, the Mn atomic magnetic-moment orientation and how it reacts to strain differ in the FM and AF phases. In some cases a FM insulating (FMI) phase adds to the AF and FM. Its peculiar magnetic properties include in-plane magnetic anisotropy and partial release of the orbital moment quenching. Nevertheless the FMI phase appears little coupled to the other ones.
Aruta, C., Ghiringhelli, G., Bisogni, V., Braicovich, L., Brookes, N., Tebano, A., et al. (2009). Orbital occupation, atomic moments, and magnetic ordering at interfaces of manganite thin films. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 80(1) [10.1103/PhysRevB.80.014431].
Orbital occupation, atomic moments, and magnetic ordering at interfaces of manganite thin films
TEBANO, ANTONELLO;BALESTRINO, GIUSEPPE
2009-01-01
Abstract
We have performed x-ray linear and circular magnetic dichroism experiments at the Mn L-2,L-3 edge of the La0.7Sr0.3MnO3 ultrathin films. Our measurements show that the antiferromagnetic (AF) insulating phase is stabilized by the interfacial rearrangement of the Mn 3d orbitals, despite the relevant magnetostriction anisotropic effect on the double-exchange ferromagnetic (FM) metallic phase. As a consequence, the Mn atomic magnetic-moment orientation and how it reacts to strain differ in the FM and AF phases. In some cases a FM insulating (FMI) phase adds to the AF and FM. Its peculiar magnetic properties include in-plane magnetic anisotropy and partial release of the orbital moment quenching. Nevertheless the FMI phase appears little coupled to the other ones.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
