skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Magneto-transport anisotropy in epitaxially grown hybrid MnAs/GaAs multilayer

Abstract

Using molecular-beam epitaxy, we grew a MnAs/GaAs multilayer on a GaAs(100) substrate and compared its magneto-transport characteristics to those of a single-layer MnAs thin film. The crystal orientation of the MnAs layers in both samples was type-B. M–H measurements revealed two-fold symmetric magnetic anisotropy on the surface with the easy and hard direction of magnetization. When the current flowed along the hard direction, the MnAs/GaAs multilayer exhibited negative magnetoresistance below Curie temperature; when the current flowed along the easy direction, it turned positive. We suggest that this peculiar anisotropic magneto-transport behavior in the multilayer originated from two-dimensional carrier confinement and spin-orbit coupling.

Authors:
 [1]; ; ;  [2]
  1. Department of Physics, Chungnam National University, Daejeon 305-764 (Korea, Republic of)
  2. Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208 (United States)
Publication Date:
OSTI Identifier:
22409989
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANISOTROPY; COMPARATIVE EVALUATIONS; CRYSTALS; CURIE POINT; GALLIUM ARSENIDES; HETEROJUNCTIONS; LAYERS; L-S COUPLING; MAGNETIZATION; MAGNETORESISTANCE; MANGANESE ARSENIDES; MOLECULAR BEAM EPITAXY; SUBSTRATES; SURFACES; THIN FILMS; TWO-DIMENSIONAL SYSTEMS

Citation Formats

Song, J. H., E-mail: songjonghyun@cnu.ac.kr, Cui, Y., Lee, J. J., and Ketterson, J. B. Magneto-transport anisotropy in epitaxially grown hybrid MnAs/GaAs multilayer. United States: N. p., 2015. Web. doi:10.1063/1.4913288.
Song, J. H., E-mail: songjonghyun@cnu.ac.kr, Cui, Y., Lee, J. J., & Ketterson, J. B. Magneto-transport anisotropy in epitaxially grown hybrid MnAs/GaAs multilayer. United States. doi:10.1063/1.4913288.
Song, J. H., E-mail: songjonghyun@cnu.ac.kr, Cui, Y., Lee, J. J., and Ketterson, J. B. Thu . "Magneto-transport anisotropy in epitaxially grown hybrid MnAs/GaAs multilayer". United States. doi:10.1063/1.4913288.
@article{osti_22409989,
title = {Magneto-transport anisotropy in epitaxially grown hybrid MnAs/GaAs multilayer},
author = {Song, J. H., E-mail: songjonghyun@cnu.ac.kr and Cui, Y. and Lee, J. J. and Ketterson, J. B.},
abstractNote = {Using molecular-beam epitaxy, we grew a MnAs/GaAs multilayer on a GaAs(100) substrate and compared its magneto-transport characteristics to those of a single-layer MnAs thin film. The crystal orientation of the MnAs layers in both samples was type-B. M–H measurements revealed two-fold symmetric magnetic anisotropy on the surface with the easy and hard direction of magnetization. When the current flowed along the hard direction, the MnAs/GaAs multilayer exhibited negative magnetoresistance below Curie temperature; when the current flowed along the easy direction, it turned positive. We suggest that this peculiar anisotropic magneto-transport behavior in the multilayer originated from two-dimensional carrier confinement and spin-orbit coupling.},
doi = {10.1063/1.4913288},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 17,
volume = 117,
place = {United States},
year = {2015},
month = {5}
}