HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Research Center for Integrated Quantum Electronics >
Peer-reviewed Journal Articles, etc >

Analysis of magnetic random telegraph noise in individual arrangements of a small number of coupled MnAs nanoclusters

Files in This Item:
PhysRevB.92.165306.pdf581.16 kBPDFView/Open
Please use this identifier to cite or link to this item:

Title: Analysis of magnetic random telegraph noise in individual arrangements of a small number of coupled MnAs nanoclusters
Authors: Fischer, Martin Browse this author
Elm, Matthias T. Browse this author
Kato, Hiroaki Browse this author
Sakita, Shinya Browse this author
Hara, Shinjiro Browse this author →KAKEN DB
Klar, Peter J. Browse this author
Issue Date: 6-Oct-2015
Publisher: American Physical Society
Journal Title: Physical Review B
Volume: 92
Issue: 16
Start Page: 165306
Publisher DOI: 10.1103/PhysRevB.92.165306
Abstract: The temporal dependence of the resistance of MnAs nanocluster arrangements grown by selective-area metal-organic vapor-phase epitaxy is investigated at different temperatures. The resistance of such arrangements exhibits random telegraph noise with jumps between discrete resistance levels. The effect is attributed to thermally activated switching of the magnetic domain structure resulting in alterations of spin-dependent scattering between the MnAs clusters of the arrangements. The behavior can be qualitatively understood by a simple model in which it is assumed that the nanocluster arrangement consists of three domains in accordance with investigations by magnetic force microscopy. The magnetizations of the outer larger domains remain fixed, whereas the magnetization of a smaller intermediate domain (or domain wall) exhibits thermally activated switching between local minima of its energy landscape. The results of the model indicate that the time scale of an actual switching event of the entire intermediate domain comprises the nucleation of a seed domain consisting of a few thousand Mn spins followed by the transformation of the entire domain by domain-wall motion in order to reorient its magnetization.
Rights: ©2015 American Physical Society
Type: article
Appears in Collections:量子集積エレクトロニクス研究センター (Research Center for Integrated Quantum Electronics) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 原 真二郎

Export metadata:

OAI-PMH ( junii2 , jpcoar_1.0 )

MathJax is now OFF:


 - Hokkaido University