Tunneling magnetoresistance effect in Co/TPD granular films

被引：1
|
作者：
Sheng, P. [1 ,2 ]
Ni, G. [1 ,2 ,4 ]
Yin, J. F. [1 ,2 ]
Zhang, Y. [1 ,2 ]
Tang, Z. Y. [3 ]
Zhou, S. M. [1 ,2 ]
Jin, Q. Y. [1 ,2 ]
机构：
[1] Fudan Univ, Dept Opt Sci & Engn, Shanghai 200433, Peoples R China
[2] Fudan Univ, State Key Lab Adv Photon Mat & Devices, Shanghai 200433, Peoples R China
[3] Fudan Univ, Dept Mat Sci & Engn, Shanghai 200433, Peoples R China
[4] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 477卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
Composite materials; Magnetic films and multilayers; Magnetoresistance; Tunneling; GIANT MAGNETORESISTANCE; SPIN;
D O I：
10.1016/j.jallcom.2008.10.123
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：
A series of Co-x(TPD)(1-x) granular film samples were fabricated by co-evaporating technique, where Co nanoparticles are dispersed in TPD molecules matrix. The HRTEM images show typical microstructural characteristic of granular films. Magnetization, electrical conduction, and magnetoresistance (MR) of Cox(TPD)(1-x) granular films, have been investigated over a wide temperature range and Co volume fraction. The negative MR have been observed in these samples. reaching -1.75% (x = 36 vol.%, at 4.2 K, 10 kOe). The mechanism of magneto-transport behaviors has been discussed. It is suggested that the negative MR results from tunneling magnetoresistance (TMR) effect. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：32 / 35
页数：4
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