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

页码：995 / 998

页数：4

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