Strong enhancement of spin ordering by A-site magnetic ions in the ferrimagnet CaC⁢u3⁢F⁢e2⁢O⁢s2⁢O12

Release time:2016-07-12  Hits:

• DOI number:10.1103/PhysRevB.94.024414
• Journal:Physical Review B
• Abstract: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.
• Indexed by:Journal paper
• Translation or Not:no
• Date of Publication:2016-01-01
• Links to published journals:https://journals.aps.org/prb/abstract/10.1103/PhysRevB.94.024414