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On the hydrodynamic theory of a magnetic liquid I. General description

Author

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  • Mrygold, I.M
  • Tokarchuk, M.V
  • Folk, R

Abstract

Using Zubarev's method of nonequilibrium statistical operator, the generalized hydrodynamic equations are obtained for a model of magnetic liquid in an inhomogeneous external field. In this model the “liquid” subsystem is treated as a classical one and the “magnetic” subsystem is described by quantum mechanical methods. The properties of the transport equations are analysed in the case of a weak nonequilibrium. The equations for time correlation functions and collective mode spectrum are also found in the same manner. It is shown that the generalized hydrodynamic equations reduce to the well-known results in the limiting cases when the dynamic variables of one subsystem are formally neglected. As an illustration, a simple model of spin relaxation is considered, and the frequency matrix and the matrix of memory functions are calculated. A comparison with previous works is made.

Suggested Citation

  • Mrygold, I.M & Tokarchuk, M.V & Folk, R, 1995. "On the hydrodynamic theory of a magnetic liquid I. General description," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 220(3), pages 325-348.
    • Handle: RePEc:eee:phsmap:v:220:y:1995:i:3:p:325-348
    DOI: 10.1016/0378-4371(95)00232-V
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