High-Pressure Synthesis of Quadruple Perovskite Oxide CaCu3Cr2Re2O12 with a High Ferrimagnetic Curie Temperature

• Published in: Inorganic chemistry Vol. 63; no. 7; pp. 3499 - 3505
• Main Authors: Zhang, Jie, Liu, Zhehong, Ye, Xubin, Wang, Xiao, Lu, Dabiao, Zhao, Haoting, Pi, Maocai, Chen, Chien-Te, Chen, Jeng-Lung, Kuo, Chang-Yang, Hu, Zhiwei, Yu, Xiaohui, Zhang, Xueqiang, Pan, Zhao, Long, Youwen
• Format: Journal Article
• Language: English
• Published: American Chemical Society 19.02.2024
• ISSN: 0020-1669; 1520-510X
• DOI: 10.1021/acs.inorgchem.3c04243

An AA’3B2B’2O12-type quadruple perovskite oxide of CaCu3Cr2Re2O12 was synthesized at 18 GPa and 1373 K. Both an A- and B-site ordered quadruple perovskite crystal structure was observed, with the space group Pn-3. The valence states are verified to be CaCu3 2+Cr2 3+Re2 5+O12 by bond valence sum calculations and synchrotron X-ray absorption spectroscopy. The spin interaction among Cu2+, Cr3+, and Re5+ generates a ferrimagnetic transition with the Curie temperature (T C) at about 360 K. Moreover, electric transport properties and specific heat data suggest the presence of a half-metallic feature for this compound. The present study provides a promising quadruple perovskite oxide with above-room-temperature ferrimagnetism and possible half-metallic properties, which shows potential in the usage of spintronic devices.