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

作者：Mizumaki M^*; Chen W T; Saito T; Yamada I; Attfield J Paul; Shimakawa Y

来源：Physical Review B, 2011, 84(9): 094418.

DOI：10.1103/PhysRevB.84.094418

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.

• 出版日期2011-9-15