Effect of field-induced magnetic ordering on the electrical resistance of the frustrated magnet Au80Co20

被引：2

作者：

Coïsson, M

Selvaggini, V

Bosco, E

机构：

[1] Ist Elettrotecnico Nazl Galileo Ferraris, I-10135 Turin, Italy

[2] INFM, UdR TO Poli, I-10135 Turin, Italy

[3] Politecn Torino, Dipartimento Fis, I-10129 Turin, Italy

[4] INFM, UdR TO Poli, I-10129 Turin, Italy

[5] Univ Turin, Dipartimento Chim, IFM, I-10125 Turin, Italy

[6] Univ Turin, INFM, UdR, I-10125 Turin, Italy

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2003年 / 262卷 / 01期

关键词：

magnetoresistance; magnetic frustration; disordered magnetic systems;

D O I：

10.1016/S0304-8853(03)00022-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Au80Co20 platelets were produced by solid-state quenching followed by furnace annealing and characterized by X-ray diffraction. Magnetization and magnetoresistance (MR) were measured from 2 to 265 K. Minima of the zero-field electrical resistance R-0(T) were observed at low temperatures (T(m)approximate to20 K) in both as-quenched and annealed samples. These minima disappear upon applying a magnetic field. At low T, a negative MR is associated to strong frustration and a very short magnetic coherence length; at higher temperatures, a positive MR is also observed. (C) 2003 Published by Elsevier Science B.V.

引用

页码：73 / 77

页数：5

共 27 条

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