To the mean-field theory of a two-sublattice antiferromagnet

Автор(и)

  • A.A. Zvyagin Max-Planck-Institut für Physik komplexer Systeme, Dresden, D-01187, Germany
  • G.A. Skorobagat`ko B. Verkin Institute for Low Temperature Physics and Engineering of the National Academe of Sciences of Ukraine, 47 Lenin Ave., Kharkov, 61103, Ukraine

DOI (Low Temperature Physics):


https://doi.org/10.1063/1.2216229

Ключові слова:

magnetic sublattice, mean-field approximation, re-entrant phase transitions.

Анотація

Numerical solutions of the mean-field theory of a two-sublattice antiferromagnet with a strong crystalline electric field are studied. The validity of the solutions was checked with the help of known analytical results for the special case of the lowest doublet (S = 1/2). For larger values of the lowest multiplet (S > 1/2). the temperature and magnetic field dependencies of the antiferromagnetic order parameter and the total magnetization are calculated and their features are analyzed. We predict new re-entrant phase transitions between Néel and paramagnetic phases for S ≥ 1.

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Опубліковано

2006-05-17

Як цитувати

(1)
A.A. Zvyagin and G.A. Skorobagat`ko, To the mean-field theory of a two-sublattice antiferromagnet, Low Temp. Phys. 32, (2006) [Fiz. Nizk. Temp. 32, 845-852, (2006)] DOI: https://doi.org/10.1063/1.2216229.

Номер

Том 32 № 7 (2006)

Розділ

Низькотемпературний магнетизм

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