PT Journal
AU Zhou, L
   Hu, LB
   Lin, ZF
   Kawazoe, Y
   Tao, RB
TI Quantum approach for magnetic multilayers at finite
   temperatures
SO PHYSICAL REVIEW B
AB The Green's function technique has been employed to examine the
   finite-temperature properties of a magnetic multilayer both in
   aligned and in canted spin configurations. A local coordinates
   system is introduced to describe complicated spin
   configurations which are determined by minimizing the free
   energy of the magnetic multilayer. Thermal averages of S-m(Zm)
   in each layer are selected to be independent variables: and the
   necessarily self-consistent equations are obtained successfully
   based on the random phase approximation. The temperature
   dependences of the coercivity, the hysteresis, and the magnetic
   multivalued recording have been discussed, and an application
   of the present approach to the canted spin state is given in a
   double-film system.