点击次数：

DOI码：10.1103/PhysRevB.94.024414

发表刊物：Physical Review B

摘要：ABO3 perovskite is a kind of very important functional material with versatile physical properties. Although A-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 ferrimagnet CaC⁢u3⁢F⁢e2⁢O⁢s2⁢O12 with magnetic transition metals occupying three different atomic sites. This compound is synthesized by a special high-pressure annealing process. It possesses a much higher Curie temperature  of 580 K compared with that of the B-site-only ordered C⁢a2⁢FeOs⁢O6 without magnetic ion at the A site. First-principles numerical calculations reveal that this enhancement primarily originates from the additional spin interaction between the A'-site C⁢u2+ and the B'-site O⁢s5+, generating a strong C⁢u2+⁡(↑↑)⁢F⁢e3+⁡(↑↑)⁢O⁢s5+⁡(↑↓) ferrimagnetic spin coupling. This work opens up an alternative way for enhancing the spin ordering temperature by introducing A-site magnetic ions.

论文类型：期刊论文

是否译文：否

发表时间：2016-01-01

发布期刊链接：https://journals.aps.org/prb/abstract/10.1103/PhysRevB.94.024414