Synthesis, crystal structure, and magnetic properties of quaternary iron selenides: Ba2FePnSe5 (Pn = Sb, Bi)

被引：10

作者：

Wang, Jian ^{[1
]}

Greenfield, Joshua T. ^{[1
]}

Kovnir, Kirill ^{[1
]}

机构：

[1] Univ Calif Davis, Dept Chem, One Shields Ave, Davis, CA 95616 USA

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2016年 / 242卷

关键词：

Crystal structure; Iron selenide; Bismuth selenide; Antimony selenide; Antiferromagnetic semiconductor; TETRAHEDRAL FESE2 CHAINS; THERMOELECTRIC PROPERTIES; PHASE-DIAGRAM; SUPERCONDUCTIVITY; STATE; FE;

D O I：

10.1016/j.jssc.2015.12.030

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Two new barium iron pnictide-selenides, Ba2FeSbSe5 and Ba2FeBiSe5, were synthesized by a high temperature solid-state route and their crystal structures were determined using single crystal X-ray diffraction. Both compounds are isomorphic to the high pressure phase Ba3FeS5 and crystallize in the orthorhombic space group Pnma (No. 62) with cell parameters of a=12.603(2)/12.619(2) angstrom, b=9.106(1)/9.183(1) angstrom, c=9.145(1)/9.123(1) angstrom and Z=4 for Ba2FeSbSe5 and Ba2FeBiSe5, respectively. According to differential scanning calorimetry, Ba(2)FePnSe(5) compounds exhibit high thermal stability and melt congruently at 1055(5) K (Pn=Sb) and 1105(5) K (Pn=Bi). Magnetic characterizations reveal strong anti ferromagnetic nearest-neighbor interactions in both compounds resulting in an antiferromagnetic ordering at 58(1) K for Ba2FeSbSe5 and 79(2) K for Ba2FeBiSe5. The magnetic interactions between Fe3+ centers, which are at least 6 A apart from each other, are mediated by superexchange interactions. (C) 2015 Elsevier Inc. All rights reserved.

引用

页码：22 / 27

页数：6

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