Temperature dependence of magnetisation and paramagnetism of ferromagnetic-antiferromagnetic superlattices
Xuang-Zhang Wang; Zhan Zhang; Xuang-Zhang Wang; Dept. of Phys., Harbin Normal Univ., China; Zhan Zhang; Dept. of Phys., Harbin Normal Univ., China
Журнал:
Journal of Physics: Condensed Matter
Дата:
1990-07-02
Аннотация:
Using the mean-field approximation, the spontaneous magnetisation and paramagnetic susceptibility of localised spin ferromagnetic-superlattices, in which the antiferromagnetic films possess an odd number of the atomic planes which are parallel to the interfaces of the superlattices, are calculated numerically. A study of the spontaneous magnetisation as a function of temperature shows that the superlattices display five kinds of magnetism, and the compensation point appears for some values of the parameters J<sub>ab</sub>, J<sub>a</sub> and J<sub>b</sub>. The calculation for the paramagnetic susceptibility shows that this system displays a paramagnetism that is similar to ferromagnetic, antiferromagnetic or ferromagnetic paramagnetism, depending upon J<sub>ab</sub>, J<sub>a</sub>, J<sub>b</sub> and the period of the system.
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