Correlation Functions of the Magnetization in Thin Films

Details Correlation Functions of the Magnetization in Thin Films Correlation Functions of the Magnetization in Thin Films

2003-05-16

arxiv.org/abs/cond-mat/0305400v1

Physics

Condensed Matter

Materials Science

35 pages, 1 fig

Scientific paper

10.1103/PhysRevB.69.134412

We calculate the correlation functions of uniform magnetization in thin ferromagnetic films for small deviations from equilibrium, by using a functional formalism. To take account of dissipation and fluctuations consistently, the magnetization is coupled to a bosonic heat bath. The correlation functions show strong dependence on the nature of the coupling between the bath and the system. Depending on what coupling we choose, we show how the recent results $(\text{J. Appl. Phys. 90, 5768 (2001); Phys. Rev. B 65, 172417 (2002)}) $ obtained by macroscopic methods can be related to the microscopic treatment adopted here.

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