PARAMAGNETIC FERROMAGNETIC PHASE-TRANSITION DURING GROWTH OF ULTRATHIN CO/CU(001) FILMS

被引：37

作者：

SCHUMANN, FO

BUCKLEY, ME

BLAND, JAC

机构：

[1] Cavendish Laboratory, Cambridge CB3 0HE, Madingley Road

来源：

PHYSICAL REVIEW B | 1994年 / 50卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.50.16424

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the magnetic response of ultrathin paramagnetic Co/Cu(001) films in an applied field using the magneto-optic Kerr effect. We find that the paramagnetic susceptibility χ increases sharply upon Co deposition within a narrow thickness range close to the critical thickness at which the onset of ferromagnetism occurs. We attribute the observed behavior to a geometrical, or percolation phase transition, since the corresponding critical exponent γ=43/18=2.39 agrees well with the experimentally determined value of 2.40±0.07. © 1994 The American Physical Society.

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页码：16424 / 16427

页数：4

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