Lambda (λ) Transition in the Heat Capacity by Finite Block Spin Phenomenology

Kwang Sei Lee, Je Huan Koo, Cheol Eui Lee

Research output: Contribution to journalArticle

Abstract

We explain the lambda (λ) transition in the heat capacity in terms of spin freezing on the basis of finite-sized block spin concepts. Thus, the spin-glass phase or the antiferromagnetic/paramagnetic phase near the Néel temperature may be considered as a short-range ordering of the block spins comprised of many random spins with respective majority spin directions. Using the Curie law for the block spins, we obtain the λ-type heat capacity in the lower and the higher temperature approximations of the Brillouin function. The theoretical heat capacity gives a good fit to the experimental data.

Original languageEnglish
Pages (from-to)1085-1088
Number of pages4
JournalJournal of the Korean Physical Society
Volume74
Issue number11
DOIs
Publication statusPublished - 2019 Jun 1

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phenomenology
specific heat
spin glass
freezing
approximation

Keywords

  • Antiferromagnetic phase transition
  • Heat capacity
  • Lambda (λ) transition
  • N´eel temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Lambda (λ) Transition in the Heat Capacity by Finite Block Spin Phenomenology. / Lee, Kwang Sei; Koo, Je Huan; Lee, Cheol Eui.

In: Journal of the Korean Physical Society, Vol. 74, No. 11, 01.06.2019, p. 1085-1088.

Research output: Contribution to journalArticle

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