Plasticity-induced magnetization in amorphous magnetic solids

Amorphous magnetic solids, like metallic glasses, exhibit a novel effect: the growth of magnetic order as a function of mechanical strain under athermal conditions in the presence of a magnetic field. The magnetic moment increases in steps whenever there is a plastic event. Thus, plasticity induces...

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Bibliographic Details
Published inEurophysics letters Vol. 105; no. 3; pp. 37006 - p1-37006-p6
Main Authors Hentschel, H. George E., Procaccia, Itamar, Sen Gupta, Bhaskar
Format Journal Article
LanguageEnglish
Published EDP Sciences, IOP Publishing and Società Italiana di Fisica 01.02.2014
Subjects
75.50.Kj
Amorphous materials
Computer simulation
Magnetic fields
Magnetization
Mathematical models
Noise
Plasticity
Strain
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Summary:Amorphous magnetic solids, like metallic glasses, exhibit a novel effect: the growth of magnetic order as a function of mechanical strain under athermal conditions in the presence of a magnetic field. The magnetic moment increases in steps whenever there is a plastic event. Thus, plasticity induces the magnetic ordering, acting as the effective noise driving the system towards equilibrium. We present results of atomistic simulations of this effect in a model of a magnetic amorphous solid subjected to pure shear and a magnetic field. To elucidate the dependence on external strain and magnetic field we offer a mean-field theory that provides an adequate qualitative understanding of the observed phenomenon.
Bibliography:istex:1E8F260B0576C745EE90D5C202F13C513570EA87
ark:/67375/80W-T02SRTFW-W
publisher-ID:epl16085
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0295-5075
1286-4854
DOI:10.1209/0295-5075/105/37006