Room-temperature giant magnetoresistance of melt-spun ribbons and thin films of granular Cu100-xCox

被引：0
作者：
Tiberto, P
Vinai, F
Allia, P
Rava, P
机构：
[1] INFM, I-10125 TURIN, ITALY
[2] POLITECN TORINO, DIPARTIMENTO FIS, I-10129 TURIN, ITALY
[3] INFM, I-10129 TURIN, ITALY
[4] ELETTRORAVA SPA, TURIN, ITALY
来源：
NANOPHASE MATERIALS | 1995年 / 195卷
关键词：
granular magnetic materials; giant magnetoresistance;
D O I：
10.4028/www.scientific.net/MSF.195.203
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Bulk granular Cu90Co10 alloys displaying a negative giant magnetoresistance (GMR) have been produced by submitting melt-spun ribbons to conventional annealing and to de Joule-Heating in vacuo to induce the precipitation of Go-cluster with size in the nanometer range. Room-temperature GMR values up to 7% al 20 kOe are observed in samples submitted to suitable de Joule-heating treatments. Shorthand information on the distribution of particle radii is obtained by analysing the room-temperature anhysteretic magnetisation curves. The magnetoresistance has been evaluated on as-prepared and annealed thin films of the same starting composition obtained by sputtering. The measured effect is always lower in sputtered films than in melt-spun ribbons. The effect of the substrate temperature during the film deposition on the GMR is studied.
引用
收藏
页码：203 / 208
页数：6
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