Long-time decay of thermoremanent magnetization through stepwise changes of the reentrant spin-glass-like state in the Ni2In-type Mn7Sn4

Y. Isogai, T. Kobayashi, T. Yoshida, S. Anzai, M. Matoba

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The zero-field-cooled magnetization at the magnetic field H = 300 Oe shows anomolous kinks at TA and TB (> TA) far below the reentrant spin-glass-like transition temperature Tf (above which a long-range ferrimagnetic ordering is set up). The irreversibility between the zero-field-cooled and the field-cooled magnetizations, and the time decay of the thermoremanent magnetization (σTRM) are observed below the ferrimagnetic Curie temperature Tc. The decay feature can be described by Ogielski's power law σTRM = At whose α exhibits peaks at TA, TB, Tf and TC. The peak of α at TC can be fitted by the combination of Ising type and Ginzburg-Landan type expressions. Three stepwise changes of the spin-glass-like state below Tf and the feature of the coexistence of short-range spin-glass and long-range magnetic ordering components above Tf are discussed.

Original languageEnglish
Pages (from-to)213-220
Number of pages8
JournalPhysica Status Solidi (B) Basic Research
Issue number1
Publication statusPublished - 1997 Sep


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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