Crystal Structure, Charge Transport, and Magnetic Properties of MnSb2Se4

被引：38

作者：

Djieutedjeu, Honore ^{[1
,2
]}

Makongo, Julien P. A. ^{[1
]}

Rotaru, Aurelian ^{[1
]}

Palasyuk, Andriy ^{[3
]}

Takas, Nathan J. ^{[1
]}

Zhou, Xiaoyuan ^{[4
]}

Ranmohotti, Kulugammana G. S. ^{[1
]}

Spinu, Leonard ^{[1
]}

Uher, Ctirad ^{[4
]}

Poudeu, Pierre F. P. ^{[1
,2
]}

机构：

[1] Univ New Orleans, Adv Mat Res Inst, New Orleans, LA 70148 USA

[2] Univ New Orleans, Dept Chem, New Orleans, LA 70148 USA

[3] N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA

[4] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2011年 / 26期

基金：

美国国家科学基金会;

关键词：

Manganese; Antimony; Selenium; Semiconductors; Magnetic properties; Thermoelectricity; NEUTRON-DIFFRACTION; PHYSICAL-PROPERTIES; MONOCLINIC MNSB2S4; BERTHIERITE; HGBI2S4;

D O I：

10.1002/ejic.201100364

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A single phase of MnSb2Se4 was synthesized by combining high-purity elements at 773 K. Single-crystal X-ray diffraction revealed that MnSb2Se4 is isostructural with FeSb2Se4 crystallizing in the monoclinic space group C2/m with a = 13.076(3) angstrom, b = 3.965(2) angstrom, c = 15.236(4) angstrom, beta = 115.1(2)degrees, Z = 4. MnSb2Se4 melts congruently at 790 K and is thermally stable up to 1000 K. Electronic band structure calculations, infrared diffuse reflectance spectroscopy, and low-temperature electronic transport data indicate that MnSb2Se4 is a narrow-bandgap p-type semiconductor with an energy bandgap of approximately 0.31 eV and exhibits a sharp increase in the resistivity near 230 K. A large Seebeck coefficient (S = +945 mu V K-1), high electrical resistivity (rho approximate to 9 Omega m), and low thermal conductivity (kappa = 1.4 Wm(-1) K-1) were observed at 300 K. Direct current (DC) magnetic-susceptibility measurements indicated that MnSb2Se4 is paramagnetic at 300 K and undergoes an order/disorder antiferromagnetic transition with a Neel temperature of approximately 20 K. Alternating current (AC) susceptibility at various frequencies suggested a spin-glass-like behavior.

引用

页码：3969 / 3977

页数：9