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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
Re-entrant spin glass transitions: new insights from acoustic absorption by domain walls
S Kustov1,2, J Torrens-Serra1, E K H Salje3
1Universitat de les Illes Balears, Dep.de Física, Cra. Valldemossa, km. 7.5, 07122, Palma de Mallorca, Spain.
Abstract:
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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