Liu, Z.; Peng, J.; Wang, X.; Temnikov, F.; Ushakov, A.; Ye, X.; Pan, Z.; Zhang, J.; Pi, M.; Tang, S.; Chen, K.; Radu, F.; Hu, Z.; Chen, C.T.; Chi, Z.; Pchelkina, Z.; Irkhin, V.; Shen, Y.; Streltsov, S.V.; Long, Y.: High-pressure synthesis and high-performance half metallicity of quadruple perovskite oxide DyCu3Fe2Re2O12. Fundamental Research early view (2025)
10.1016/j.fmre.2024.11.024
Open Accesn Version
Abstract:
The A- and B-site ordered quadruple perovskite oxide DyCu3 Fe 2 Re 2 O 12 with cubic Pn-3 symmetry was synthesized under high-pressure and high-temperature conditions. The material experiences a sharp long-range ferrimagnetic transition arising from the strong superexchange antiferromagnetic interactions of Cu-Re and Fe-Re at a high Curie temperature (TC ≈ 660 K). Owing to the influence at lower temperatures of the antiferromagnetic ordering of the Dy3+ occupying the A-site, the susceptibility of DyCu3 Fe 2 Re 2 O 12 decreases continuously below 50 K, which is essentially different from that of the isostructural compound LaCu3 Fe 2 Re 2 O 12 . Moreover, in the presence of a magnetic field, the A-site Dy3+ spins are readily transformed into the ferromagnetic state from theantiferromagnetic ground state. Thus,the saturated magnetic moment of DyCu3 Fe 2 Re 2 O 12 is sharply enhanced from 7.0 μB /f.u. at 300 K to 14 μB /f.u. at 2 K by applying a magnetic field of 7 T. Theoretical calculations suggest that DyCu3 Fe 2 Re 2 O 12 is a half-metallic ferrimagnet with a spin-up band gap of approximately 2.0 eV. The combination of the high Curie temperature, wide half-metallic energy gap, and large magnetic moment makes DyCu3 Fe 2 Re 2 O 12 promising for potential applications in advanced spintronic devices.