Strong enhancement of spin ordering by A-site magnetic ions in the ferrimagnet CaCu<sub>3</sub>Fe<sub>2</sub>Os<sub>2</sub>O<sub>12</sub>
- Deng, H.
- Liu, M.
- Dai, J.
- Hu, Z.
- Kuo, C.
- Yin, Y.
- Yang, J.
- Wang, X.
- Zhao, Q.
- Xu, Y.
- Fu, Z.
- Cai, J.
- Guo, H.
- Jin, K.
- Pi, T.
- Soo, Y.
- Zhou, G.
- Cheng, J.
- Chen, K.
- Ohresser, P.
- Yang, Y.
- Jin, C.
- Tjeng, L.
- Long, Y.
DOIAbstract
ABO(3) perovskite is a kind of very important functional material with versatile physical properties. Although B-site chemical substitution with various magnetic ions has been widely investigated, the A-site doping with magnetic transition metal is little known. Here we report AA'3B2B'(2) O-12-type A-and B-site ordered ferrimagnet CaCu3Fe2Os2O12 with magnetic transition metals occupying three different atomic sites (A', B, and B' sites). This compound is synthesized by a special high-pressure annealing process. It possesses a much higher Curie temperature T-C of 580 K compared with that of the B-site-only ordered Ca2FeOsO6 (T-C = 320 K) without magnetic ion at the A site. First-principles numerical calculations reveal that this enhancement ...
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