Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.
Inorg Chem. 2010 Mar 1;49(5):2492-5. doi: 10.1021/ic9024876.
The A-site-ordered perovskite YMn(3)Al(4)O(12) was prepared by high-pressure synthesis. Structural analysis with synchrotron powder X-ray diffraction data and the Mn L-edges X-ray absorption spectrum revealed that the compound has a chemical composition Y(3+)Mn(3+)(3)Al(3+)(4)O(2-)(12) with magnetic Mn(3+) at the A' site and non-magnetic Al(3+) at the B site. An antiferromagnetic interaction between the A'-site Mn(3+) spins is induced by the nearest neighboring Mn-Mn direct exchange interaction and causes an antiferromagnetic transition at 34.3 K.
A- 位有序钙钛矿 YMn(3)Al(4)O(12) 采用高压合成法制备。同步辐射粉末 X 射线衍射数据和 Mn L 边 X 射线吸收谱的结构分析表明，该化合物的化学式为 Y(3+)Mn(3+)(3)Al(3+)(4)O(2-)(12)，其中 A' 位为磁性 Mn(3+)，B 位为非磁性 Al(3+)。A' 位 Mn(3+)自旋之间的反铁磁相互作用是由最近邻 Mn-Mn 直接交换相互作用引起的，导致在 34.3 K 发生反铁磁转变。
