Two-dimensional XY-like amorphous Co68Fe24Zr8/Al70Zr30 multilayers

Article

关键词: MAGNETIC PHASE-TRANSITION;    ULTRATHIN FE FILMS;    CRITICAL-BEHAVIOR;    MONTE-CARLO;    ALLOYS;    MODEL;    FLUCTUATIONS;    UNIVERSALITY;    FERROMAGNET;    DISORDER;   

DOI  :  10.1103/PhysRevB.83.224404

来源: SCIE

【 摘 要 】

We present an experimental realization of a magnetic two-dimensional XY system using amorphous materials. The classification of the dimensionality is based on the critical behavior of amorphous Co68Fe24Zr8(d)/Al70O30 (20 angstrom) multilayers, where d = 11 - 16 angstrom. Analysis of the remanent magnetization, the magnetic isotherms, the initial susceptibility, and the magnetic correlation length shows that the magnetic phase transition can be described by the 2D XY model. The samples are not paramagnetic above the critical temperature but are characterized by local magnetic order manifested in the field and temperature dependence of the magnetization. Furthermore, an average spin-spin interaction length of 8.1 angstrom was estimated using the thickness dependence of the Curie temperature.

【 授权许可】

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