Annealing and magnetic field effects on the resistivity of Fe-rich Fe-Zr glasses

被引：7
|
作者：
Plaza, DG
Barquin, LF
Soldevilla, JG
Antras, R
Sal, JCG
机构：
[1] Dept. CITIMAC, F. Ciencias, Univesidad de Cantabria
来源：
SOLID STATE COMMUNICATIONS | 1997年 / 102卷 / 05期
关键词：
spin glasses; electronic transport;
D O I：
10.1016/S0038-1098(97)00018-5
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Electrical resistivity at zero and applied magnetic fields has been measured in as-quenched and annealed Fe91Zr9 and Fe90Zr10 amorphous alloys between 4 and 320 K. Fe91Zr9 remained amorphous after annealing at 400 K (1 h) while in Fe90Zr10, traces of crystallites were observed. Similar annealings at 600 K were sufficient to crystallize both alloys, with alpha-Fe as the main product. A.c. susceptibility shows small changes in the Curie and spin-glass temperatures upon annealing. The resistivity displays a minimum at high temperatures (congruent to 250 K), slightly influenced by a magnetic field and thermal treatment. The resistivity is a competition of contributions in which the structure plays the most important role. The presence of magnetic inhomogeneities could also favor an enhanced electronic localization. (C) 1997 Elsevier Science Ltd.
引用
收藏
页码：353 / 357
页数：5
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