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

页码：32 / 35

页数：4

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