Green's function theory for a magnetic impurity layer in a ferromagnetic Ising film with transverse field

Details Green's function theory for a magnetic impurity layer in a ferromagnetic Ising film with transverse field Green's function theory for a magnetic impurity layer in a ferromagnetic Ising film with transverse field

2004-01-09

arxiv.org/abs/cond-mat/0401155v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

12 pages, 5 figures

Scientific paper

10.1016/j.jmmm.2004.06.010

A Green's function formalism is used to calculate the spectrum of localized modes of an impurity layer implanted within a ferromagnetic thin film. The equations of motion for the Green's functions are determined in the framework of the Ising model in a transverse field. We show that depending on the thickness, exchange and effective field parameters, there is a ``crossover'' effect between the surface modes and impurity localized modes. For thicker films the results show that the degeneracy of the surface modes can be lifted by the presence of an impurity layer.

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