Crystal structure and physical properties of Mg6Cu16Si7-type M6Ni16Si7, for M = Mg, Sc, Ti, Nb, and Ta

被引：17

作者：

Holman, K. L. ^{[1
]}

Morosan, E. ^{[1
]}

Casey, P. A. ^{[2
]}

Li, Lu ^{[2
]}

Ong, N. P. ^{[2
]}

Klimczuk, T. ^{[3
,4
]}

Felser, C. ^{[5
]}

Cava, R. J. ^{[1
]}

机构：

[1] Princeton Univ, Dept Chem, Princeton, NJ 08450 USA

[2] Princeton Univ, Dept Phys, Princeton, NJ 08450 USA

[3] Gdansk Univ Technol, Fac Appl Phys & Math, PL-80952 Gdansk, Poland

[4] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[5] Johannes Gutenberg Univ Mainz, Inst Anorgan Chem & Analyt Chem, D-55128 Mainz, Germany

来源：

MATERIALS RESEARCH BULLETIN | 2008年 / 43卷 / 01期

基金：

美国国家科学基金会;

关键词：

intermetallic compounds; metals; chemical synthesis; X-ray diffraction; superconductivity;

D O I：

10.1016/j.materresbull.2007.09.023

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Five compounds were investigated for magnetic character and superconductivity, all with non-magnetic nickel and band structures containing flat bands and steep bands. The syntheses and crystal structures, refined by powder X-ray diffraction, are reported for M6Ni16Si7, where M = Mg, Sc, Ti, Nb, and Ta. All compounds form in the Mg6Cu16Si7 structure type. Resistance measurements are also reported on M6Ni16Si7 (M = Mg, Sc, Ti, and Nb) down to 0.3 K, with all four showing metallic conductivity. No superconductivity is observed. Magnetization measurements for all compounds reveal essentially temperature independent paramagnetism, with a tendency toward more enhanced low temperature paramagnetism for the cases of Mg6Ni16Si7 and Sc6Ni16Si7. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：9 / 15

页数：7

共 15 条

[1] EXPLICIT, 1ST-PRINCIPLES TIGHT-BINDING THEORY [J].