Thermal Analysis of Freedom of Spin in Partially Disordered State of the Antiferromagnetic Triangular Lattice in CuFeO2

Kazuyoshi Takeda, Keita Miyake, Masako Hitaka, Tatsuya Kawae

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Abstract

The partially disordered spins in the triangular antiferromagnetic lattice in CuFeO2 have been studied by heat capacity measurements. a cusp and a sharp peak in the heat capacity curve were observed at TN1 = 14.0±0.5 k and TN2 = 11.0±0.5 k, respectively. The analysis of heat capacity revealed that the magnetic entropy associated with the anomaly in the heat capacity around TN2 is attributable to the disordering of one-fifth of Fe3+ spins. The present result is discussed in comparison with partially disordered states of CeSb and PrCo2Si2, anisotropic spin systems with frustration. The heat capacity cusp around TN1 is compared with the characteristic thermal behavior for frustrated spin systems.

Original languageEnglish
Pages (from-to)2017-2020
Number of pages4
JournalJournal of the Physical Society of Japan
Volume63
Issue number6
DOIs
Publication statusPublished - Jan 1 1994

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thermal analysis
specific heat
cusps
frustration
entropy
anomalies
curves

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Thermal Analysis of Freedom of Spin in Partially Disordered State of the Antiferromagnetic Triangular Lattice in CuFeO2. / Takeda, Kazuyoshi; Miyake, Keita; Hitaka, Masako; Kawae, Tatsuya.

In: Journal of the Physical Society of Japan, Vol. 63, No. 6, 01.01.1994, p. 2017-2020.

Research output: Contribution to journalArticle

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