Site preference and magnetic orderings in the intermetallic boride series M1.5Rh5.5B3 (M = Cr, Mn, Fe, Co, Ni) from first principles DFT calculations

被引：4

作者：

Ndassa, Ibrahim M. ^{[1
,2
]}

Fokwa, Boniface P. T. ^{[1
]}

机构：

[1] Rhein Westfal TH Aachen, Inst Inorgan Chem, D-52056 Aachen, Germany

[2] Univ Yaounde, Ecole Normale Super, Dept Chem, Yaounde, Cameroon

来源：

COMPUTATIONAL MATERIALS SCIENCE | 2014年 / 92卷

关键词：

Th7Fe3-type Borides; DFT; Electronic structure; COHP bonding; Ferromagnetism; Ferrimagnetism; INITIO MOLECULAR-DYNAMICS; CRYSTAL-STRUCTURE; MRH6B3; M; TRANSITION; ANTIFERROMAGNETISM; FERROMAGNETISM; CHEMISTRY; LADDERS; METALS; IRON;

D O I：

10.1016/j.commatsci.2014.05.054

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The structural parameters, chemical bonding and magnetic properties of the ternary boride series M1.5Rh5.5B3 (M = Cr, Mn, Fe, Co, Ni) were investigated by first principles DFT calculations. The calculated crystallographic lattice parameters corroborate well with the experimental results of the reported Fe1.3Rh5.7B3 single crystal. In the most stable structural model used, Fe-dumbbells as well as isolated Fe-atoms exist. From spin polarised calculations, ferromagnetism is found for the members with M = Fe, Co, while ferrimagnetism is more stable for Mn1.5Rh5.5B3 and Pauli paramagnetism is more stable for M = Cr, Ni. The total magnetic moment per formula unit for the M = Mn, Fe and Co phases is calculated to be 3.32, 5.00 and 3.26 mu(B), respectively. According to COHP chemical bonding analysis, Rh-B contacts are mainly responsible for the structural stability, while Rh-M interactions influence the magnetic behavior of these complex borides. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：416 / 421

页数：6

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