Magnetic Behaviour of Disordered Ising Ferrimagnet in High Magnetic Field

Details Magnetic Behaviour of Disordered Ising Ferrimagnet in High Magnetic Field Magnetic Behaviour of Disordered Ising Ferrimagnet in High Magnetic Field

2011-07-26

arxiv.org/abs/1107.5225v1

Physics

Condensed Matter

Materials Science

12 pages,9 Figures

Scientific paper

The magnetic behaviour of a disordered ferrimagnetic system Ap B1-p where both A and B represent the magnetic atoms with respective spin SA = 1/2 and SB = 1 in presence of high magnetic field is treated theoretically.Assuming the magnetic interaction can be described through Ising Hamiltonian the approximate free energy is obtained using the cluster-variational method. The field dependence of the magnetization is then obtained for different concentration p and exchange parameters (JAA, JBB and JAB). For p = 0.5,the magnetization M in ferrimagnetic state and in absence of compensation temperature Tcm vanishes at TC.Field induced reversal of M is found at switching temperature TS (

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