Premium
Magnetic Properties of Layered Heisenberg Ferrimagnets
Author(s) -
Qiu RongKe,
Wei GuoZhu,
Wei GuoZhu,
Du An
Publication year - 1998
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/(sici)1521-3951(199802)205:2<645::aid-pssb645>3.0.co;2-i
Subject(s) - ferrimagnetism , condensed matter physics , coupling (piping) , planar , specific heat , spin (aerodynamics) , heisenberg model , inductive coupling , internal energy , spin wave , energy (signal processing) , physics , materials science , chemistry , ferromagnetism , thermodynamics , magnetization , magnetic field , quantum mechanics , metallurgy , computer graphics (images) , computer science
The method of spin‐wave theory is used to study the magnetic properties of layered Heisenberg ferrimagnets. The internal energy and specific heat per site are calculated for different interlayer coupling strengths and temperatures. In the low temperature region θ (= K B T /6 J ) ≪ θ 1 (= (2 + δ)/3), a characteristic temperature θ 0 = δ is given (δ is the ratio of ferrimagnetic interplanar coupling to planar coupling), the asymptotic expressions of internal energy and specific heat are obtained for θ ≫ θ 0 and θ ≪ θ 0 , respectively. It is shown that the interlayer coupling has an important effect on the magnetic properties of ferrimagnets.