期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 27, 期 42, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/27/42/426002
关键词
double perovskite; magnetic properties; magnetic susceptibility
资金
- NRF [NRF-2013R1A1A2058155, NRF-2014S1A2A2028481]
- Yonsei University Future-leading Research Initiative [2014-22-0123]
- National Research Foundation of Korea [2014S1A2A2028481, 21A20131100006] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We have successfully synthesized the series of the double-perovskite R2CoMnO6 (R = rare earth: La to Lu) single crystals and have investigated their magnetic properties. The ferromagnetic order of Co2+/Mn4+ spins emerges mainly along the c axis. Upon decreasing the size of rare earth ion, the magnetic transition temperature decreases linearly from 204 K for La2CoMnO6 to 48 K for Lu2CoMnO6, along with the enhancement of monoclinic distortion. The temperature and magnetic-field dependences of magnetization reveal the various magnetic characteristics such as the metamagnetic transition in R = Eu, the isotropic nature of rare earth moment in R = Gd, and the reversal of magnetic anisotropy in R = Tb and Dy. Our results offer comprehensive information for understanding the roles of mixed-valent magnetic ions and rare earth magnetic moments on the magnetic properties.
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