Positive and negative linear magnetoresistance of graphite

被引：57
|
作者：
Zhang, X [1 ]
Xue, QZ [1 ]
Zhu, DD [1 ]
机构：
[1] Tsinghua Univ, Dept Mat Sci & Engn, Beijing 100084, Peoples R China
来源：
PHYSICS LETTERS A | 2004年 / 320卷 / 5-6期
基金：
中国国家自然科学基金;
关键词：
magnetoresistance; graphite; linear dependence;
D O I：
10.1016/j.physleta.2003.11.050
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The magnetoresistance (MR) of bulk graphite with different particle sizes is investigated. The MR of the graphite decreases with the particle size decreases. The graphite with micro-sized particles has a positive MR and exhibits positive linear field dependence of MR at about 50 K, whereas the graphite with particle size of 30.2 nm has a negative MR and exhibits negative linear field dependence of MR at about 25 K. The possible mechanism for the MR of graphite can be partially understood using ordinary MR theory, weak localization theory and diffuse scattering theory. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：471 / 477
页数：7
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