Magnetic barrier in confined two-dimensional electron gases: Nanomagnetometers and magnetic switches

被引：55
作者：
Governale, M
Boese, D
机构：
[1] Univ Karlsruhe, Inst Theoret Festkorperphys, D-76128 Karlsruhe, Germany
[2] Univ Pisa, Dipartimento Ingn Informaz, I-56126 Pisa, Italy
[3] Forschungszentrum Karlsruhe, Inst Nanotechnol, D-76021 Karlsruhe, Germany
来源：
APPLIED PHYSICS LETTERS | 2000年 / 77卷 / 20期
关键词：
D O I：
10.1063/1.1325396
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We investigate the conductance properties of a hybrid ferromagnet-semiconductor structure consisting of a confined two-dimensional electron gas and a transverse ferromagnetic strip on top. Within the framework of the Landauer-Buttiker model, we develop an alternative way to consider magnetic fields. Our method describes devices ranging from a recently realized nanomagnetometer down to quasi-one-dimensional quantum wires. We provide a rigorous way to relate the measured resistance to the actual magnetization of the strip. Regarding the quasi-one-dimensional wires we propose a device application, a tunable magnetic switch. (C) 2000 American Institute of Physics. [S0003-6951(00)01146-3].
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页码：3215 / 3217
页数：3
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