Variation of physical properties in the nominal Sr4V2O6Fe2As2

被引：19
|
作者：
Sefat, Athena S. [1 ]
Singh, David J. [1 ]
Garlea, V. Ovidiu [1 ]
Zuev, Yuri L. [2 ]
McGuire, Michael A. [1 ]
Sales, Brian C. [1 ]
机构：
[1] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA
[2] Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2011年 / 471卷 / 5-6期
关键词：
Fe-based superconductors; Oxides; Neutrons; SUPERCONDUCTIVITY;
D O I：
10.1016/j.physc.2011.01.004
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We show using a combination of powder X-ray and neutron diffraction, first-principles calculations, temperature- and field-dependent magnetization, heat capacity and resistivity data that the superconducting behavior of 'Sr4V2O6Fe2As2' is dependent on synthesis conditions, particularly, heating profiles result in unintentional chemical doping. This compound can be tuned from a state in which the vanadium electrons are itinerant with a high electronic density of states, to a state where the vanadium-oxide layers are insulating and presumably magnetic. Published by Elsevier B.V.
引用
收藏
页码：143 / 149
页数：7
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