Theory of Spin–Phonon Interactions in a System of Paramagnetic  S  = 3/2 Ions | Zendy

Psaltakis G. C. | Zendy; Cottam M. G. | Zendy

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Theory of Spin–Phonon Interactions in a System of Paramagnetic S = 3/2 Ions

Author(s) -

Psaltakis G. C.,

Cottam M. G.

Publication year - 1981

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.2221030231

Subject(s) - phonon , ion , spin (aerodynamics) , condensed matter physics , paramagnetism , physics , dispersion relation , diagrammatic reasoning , excitation , energy (signal processing) , order (exchange) , quantum mechanics , thermodynamics , linguistics , philosophy , finance , economics

Calculations are presented for the thermodynamic properties and the excitation spectrum of an interacting spin–phonon system with S = 3/2. A diagrammatic technique is employed based on a recent generalisation of the drone‐fermion representation for S > 1/2. Corrections to the free energy and to the specific heat are calculated, including contributions up to second order in the spin–phonon interaction. Estimates are given for Cr 3+ ions in MgO. The dispersion relation of the coupled spin–phonon modes is also evaluated in second order.

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