Single‐Ion Anisotropy and ESR Linewidth in Quasi‐Low‐Dimensional Heisenberg Magnets | Zendy

Martynov S. N. | Zendy

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Single‐Ion Anisotropy and ESR Linewidth in Quasi‐Low‐Dimensional Heisenberg Magnets

Author(s) -

Martynov S. N.

Publication year - 1988

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.2221460229

Subject(s) - laser linewidth , anisotropy , condensed matter physics , physics , ion , magnetic anisotropy , spin (aerodynamics) , heisenberg model , magnet , magnetic field , ferromagnetism , quantum mechanics , magnetization , thermodynamics , laser

On the basis of the Kubo and Tomita theory the influence of single‐ion anisotropy on the ESR linewidth in a low‐dimensional Heisenberg magnet is estimated in the high‐temperature limit. Two spin correlation functions in r ‐representation are used. The variation of the linewidth Δ( K ) depends on the sign of anisotropy K , the value of spin S , and the magnetic dimension of system d . The linewidth can decrease only to a limited value, equal at S , Δ( K ) = Δ(0) · (2/5) (d+1)/3 .

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