Enhanced room-temperature geometric magnetoresistance in a modified van der Pauw disk

被引：2
|
作者：
Yuan, GL [1 ]
Liu, JM [1 ]
Zhang, XJ [1 ]
Liu, ZG [1 ]
机构：
[1] Nanjing Univ, Dept Phys, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
来源：
MATERIALS LETTERS | 2002年 / 56卷 / 06期
基金：
中国国家自然科学基金;
关键词：
the semiconducting giant magnetoresistance; Van der Pauw disk; Hall effect; thin films; low magnetic fields; current distribution; the current pipes;
D O I：
10.1016/S0167-577X(02)00661-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We propose a modified design based on the van der Pauw disk to generate a very large geometric magnetoresistance owing to Hall effect. the conventional disk is a van der Pauw disk (vdP), in which a concentric circular gold plate is embedded in homogeneous nonmagnetic indium antimonide [Solin et al., Science 289 (2000) 1530.]. Because of special structures and InSb's high mobility, it exhibits strong Hall effect and shows a magnetoresistance of 100% under a magnetic field of 500 Oe at room temperature. In the modified design, half of the gold plate is instead of an ellipse-shape. Higher magnetoresistance in this new design than that of vdP is predicted under low magnetic field at room temperature. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：995 / 998
页数：4
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