Influence of particle size distribution in cermet nanocomposites on magnetoresistance sensitivity

被引：8
|
作者：
O'Connor, CJ [1 ]
Golub, VO
Vovk, AY
Kravets, AF
Pogoriliy, AM
机构：
[1] Univ New Orleans, AMRI, New Orleans, LA 70148 USA
[2] NAS Ukraine, Inst Magnetism, Kiev, Ukraine
来源：
IEEE TRANSACTIONS ON MAGNETICS | 2002年 / 38卷 / 05期
基金：
美国国家科学基金会;
关键词：
cermet; magnetoresistance; tunneling;
D O I：
10.1109/TMAG.2002.801967
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Thnneling magnetoresistance (TMR) and magnetic properties of (Co50Fe50)(x)-(Al2O3)(1-x). granular films prepared by dual electron beam evaporation were studied. The influence of the particle size distribution (PSD) on magneto-transport properties is reported. It was found that TMR versus M behavior does not follow (M/M-s)(2) law (M and M-s are magnetization and saturation magnetization, respectively), predicted for uniform size spherical particles with uncorrelated magnetic moments. Deviation from quadratic law is determined by PSD and is maximal for the films with the broadest distribution of superparamagnetic particles. or these films, the highest values of TMR and field sensitivity were also observed. The effect of PSD could be used for enhancement of TMR sensitivity in granular nanocomposites.
引用
收藏
页码：2631 / 2633
页数：3
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