GMR effect and Kondo-like behaviour in Co-Cu microwires

被引：4

作者：

Zhukov, A. ^{[1
,2
,3
]}

Mino, J. ^{[4
]}

del Val, J. J. ^{[1
]}

Varga, R. ^{[4
]}

Martinez, G. ^{[5
]}

Baibich, M. N. ^{[5
]}

Ipatov, M. ^{[1
,2
]}

Churyukanova, M. ^{[6
]}

Zhukova, V. ^{[1
,2
]}

机构：

[1] Univ Basque Country UPV EHU, Dept Phys Mater, San Sebastian 20018, Spain

[2] Univ Basque Country UPV EHU, Dept Appl Phys, EUPDS, San Sebastian 20018, Spain

[3] Basque Fdn Sci, Ikerbasque, Bilbao 48011, Spain

[4] UPJS, Fac Sci, Inst Phys, Pk Angelinum 9, Kosice 04154, Slovakia

[5] Univ Fed Rio Grande do Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil

[6] Natl Univ Sci & Technol MISIS, Moscow 119049, Russia

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 695卷

关键词：

Glass-coated microwires; Annealing; Giant magnetoresistance effect; Kondo-effect; GLASS-COATED MICROWIRES; GIANT MAGNETORESISTANCE; GRANULAR STRUCTURE; ALLOYS; RESISTANCE; SYSTEMS;

D O I：

10.1016/j.jallcom.2016.10.214

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The influence of annealing on structure and temperature and magnetic field dependences of resistance of Cu100-xCox (x = 5, 10, 20) glass-coated microwires prepared using Taylor-Ulitovsky has been studied. All Cu100-xCox microwires present resistivity minimum at certain temperature, T-m. This minimum is very well defined for as-cast samples. T-m-values decrease after annealing (from about 50 K to about 25 K). Observed R(T) dependences and the minimum are well affected by applied magnetic field. Additionally we observed a significant increasing of the GMR effect in the annealed samples (at 400 degrees C) with long enough annealing time (up to 34% GMR effect). Considerable enhancement of the GMR effect related with structural changes of the studied samples is promising for technical applications. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：976 / 980

页数：5

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