期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 357, 期 -, 页码 7-12出版社
ELSEVIER
DOI: 10.1016/j.jmmm.2013.12.049
关键词
Ferromagnetic insulator; Double perovskite; First principles
Electronic structures of transition metal pnictides double perovskite La2NiMO6 (M=Mn, Tc, Re, Ti, Zr, and Hf) were shown as ferromagnetic (FM) insulators based on density functional calculation results. The FM state observed in La2NiMO6 (M=Mn, Tc, and Re) was most likely a mixture of high spin (HS) and low spin (LS) states; the electrons were transferred from the filled LS Ni e(g) states to the half-filled HS Mn (Tc). On the other hand, the FM state in La2NiMO6 (M=Ti, Zr, and Hf) was caused by the electron transfer from the half-filled LS Ti (Zr and Hf) e(g) orbital of HS Ni to the empty e(g) orbital of LS Ti (Zr and Hf). The FM insulating state of La2NiMO6 (M=Mn. Tc, Ti, Zr, and Hf) remained the same, whereas it changed from metal to insulator for La2NiReO6 based on the generalized gradient approximation + U calculation. (C) 2014 Elsevier B.V. All rights reserved.
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