Re-entrant spin glass transitions: new insights from acoustic absorption by domain walls

Re-entrant spin glass (RSG) transitions in Ni-Mn and Au-Fe have been reassessed by acoustic measurements of the magneto-mechanical damping by domain walls. Stress-induced non-thermally activated domain wall dynamics is progressively replaced by an intense thermally activated relaxational response wh...

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Bibliographic Details
Published inScientific reports Vol. 7; no. 1; pp. 16846 - 8
Main Authors Kustov, S., Torrens-Serra, J., Salje, E. K. H., Beshers, D. N.
Format Journal Article
LanguageEnglish
Published London Nature Publishing Group UK 04.12.2017
Nature Publishing Group
Subjects
639/301/119/2793
639/301/119/997
Freezing
Freezing point
Humanities and Social Sciences
Magnetic fields
Magnetism
multidisciplinary
Science
Science (multidisciplinary)
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Summary:Re-entrant spin glass (RSG) transitions in Ni-Mn and Au-Fe have been reassessed by acoustic measurements of the magneto-mechanical damping by domain walls. Stress-induced non-thermally activated domain wall dynamics is progressively replaced by an intense thermally activated relaxational response when the temperature approaches the RSG freezing point. A “frozen” state with negligible motion of domain walls on atomic and mesoscopic scales occurs in the RSG. We propose that RSG freezing has its origin in intrinsic properties of domain walls.
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ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-017-17297-y