Direct observation of the ferrimagnetic coupling of A-site Cu and B-site Fe spins in charge-disproportionated CaCu3Fe4O12

Article

关键词: RAY CIRCULAR-DICHROISM;    PEROVSKITE;    MAGNETORESISTANCE;   

DOI  :  10.1103/PhysRevB.84.094418

来源: SCIE

【 摘 要 】

The magnetic coupling between Fe and Cu moments in the charge-disproportionated CaCu3Fe4O12 is studied by neutron powder diffraction, x-ray absorption, and magnetic circular dichroism measurements. The magnetic moments of the B-site Fe are coupled antiferromagnetically with those of the A'-site Cu, and the Fe3+ and Fe5+ spins at the B site align ferromagnetically. The orbital contribution of the magnetic moment for Fe is significant and appears to stabilize the ferrimagnetic structure of charge-disproportionated CaCu3Fe4O12.

【 授权许可】

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