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Four‐sublattice ferrimagnetic systems: II. Effects of the spin quantum number
Author(s) -
Qiu Rongke,
Zhang Zhidong
Publication year - 2004
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.200301913
Subject(s) - ferrimagnetism , condensed matter physics , antiferromagnetism , spin (aerodynamics) , spins , spin quantum number , physics , quantum , quantum fluctuation , magnetization , quantum number , ferromagnetism , quantum mechanics , spin polarization , magnetic field , electron , thermodynamics
The effects of the spin quantum number of each sublattice on the quantum fluctuations are discussed for different spin configurations in four‐sublattice ferrimagnetic systems. In multi‐sublattice ferrimagnets, although the individual sublattice magnetization vectors do not offset each other, but their deviations vectors can cancel out. Namely, the sum of the deviations of magnetization of sites with same initiate spin direction, equals to that of sites with opposite initiate spin direction Σ i Δ m 0 i= Σ j Δ m 0 j, i and j denote respectively the spins along the up and down initiate spin directions). The role of the spin quantum number of each site on magnetic properties of the system is correlative with properties of the exchange couplings surrounding the site. The results show that the proportion of ferromagnetic and antiferromagnetic exchange couplings, the spin quantum number of each sublattice and the magnetically structural symmetry of the system all play important roles on the quantum fluctuations of the systems. (© 2003 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)