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High-pressure synthesis and magnetic and electrical properties of A- and B-site ordered quadruple perovskites

ORAL · Invited

Abstract

Perovskite shows flexible crystal structures as well as various charge and ionic combinations, giving rise to many interesting physical properties. At present, perovskite is one of the most intriguing systems in condensed matter physics. In this talk, we will introduce a few both A-site and B-site ordered quadruple perovskite oxides synthesized by high pressure and high temperature techniques. In particular, we show that PbCoO3 with a peculiar charge combination of Pb2+Pb4+3Co2+2Co3+2O12 exhibits spin state, charge state, crystal structure, and metal-insulator transitions under high pressure. Others like CaCu3Co2Re2O12 and LaCu3Co2Re2O12, show exotic magnetic and electrical properties. Specifically, CaCu3Co2Re2O12, a strong insulator, possesses antiferromagnetic ordering at A-site and ferrimagnetic ordering at B-site. If Ca is replaced by La, ferrimagnetic half metallicity is observed in LaCu3Co2Re2O12.

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Publication: 1) Z. H. Liu, Y. Sakai, J. Y. Yang, W. M. Li, Y. Liu, X. B. Ye, S. J. Qin, J. M. Chen*, S. Agrestini, K. Chen, S. C. Liao, S. C. Haw, F. Baudelet, H. Ishii, T. Nishikubo, H. Ishizaki, T. Yamamoto, Z. Pan, M. Fukuda, K. Ohashi, K. Matsuno, A. Machida, T. Watanuki, S. I. Kawaguchi, A. M. Arevalo-Lopez, C. Q. Jin, Z. W. Hu, J. P. Attfield, M. Azuma*, and Y. W. Long*. Sequential spin state transition and intermetallic charge transfer in PbCoO3. J. Am. Chem. Soc. 142, 5731 (2020). <br>2) Z. H. Liu, Q. Sun, X. B. Ye, X. Wang, L. Zhou, X. D. Shen, K. Chen, L. Nataf, F. Baudelet, S. Agrestini, C. T. Chen, H. J. Lin, H. B. Vasili, M. Valvidares, Z. W. Hu, Y. F. Yang*, and Y. W. Long*. Quadruple perovskite oxide LaCu3Co2Re2O12: A ferrimagnetic half metal with nearly 100% B-site degree of order. Appl. Phys. Lett. 117, 152402 (2020).<br>3) Z. H. Liu, X. Wang, X. B. Ye, X. D. Shen, Y. C. Bian, W. Ding, S. Agrestini, S.-C. Liao, H.-J. Lin, C.-T. Chen, S.-C. Weng, K. Chen , P. Ohresser, L. Nataf, F. Baudelet, Z. G. Sheng, S. Francoual, J. R. L. Mardegan, O. Leupold, Z. F Li, X. K. Xi, W. H. Wang, L. H. Tjeng, Z. W. Hu, and Y. W. Long*. Observation of A-site antiferromagnetic and B-site ferrimagnetic orderings in the quadruple perovskite oxide CaCu3Co2Re2O12. Phy. Rev. B 103, 014414 (2021).

Presenters

  • Zhehong Liu

    Institute of Physics, Chinese Academy of Sciences

Authors

  • Zhehong Liu

    Institute of Physics, Chinese Academy of Sciences