THE INITIAL AC SUSCEPTIBILITY OF GD/W(110) FILMS IN UHV - A NEW METHOD TO INVESTIGATE MAGNETISM IN ULTRATHIN FILMS

被引：23

作者：

STETTER, U ^{[1
]}

ASPELMEIER, A ^{[1
]}

BABERSCHKE, K ^{[1
]}

机构：

[1] FREE UNIV BERLIN,INST EXPTL PHYS,ARNIMALLEE 14,W-1000 BERLIN 33,GERMANY

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1992年 / 117卷 / 1-2期

关键词：

D O I：

10.1016/0304-8853(92)90309-C

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The ac susceptibility (chi(ac)) of a 300 angstrom Gd film grown on W(110) has been investigated in-situ under UHV conditions. A full analysis of chi(ac) is given in which the domain and paramagnetic signals are clearly separated. A theoretical simulation of the para- and ferromagnetic contributions allow a precise discussion of the transition temperature, the Hopkinson maximum and the anisotropy energy K(eff). It is at least a factor of ten larger than that of polycrystalline bulk Gd. K(eff) follows a power law in (T(c) - T)kappa with 3beta < kappa < 5beta. Annealing the as-grown film decreases K(eff)(T) by a factor of five.

引用

页码：183 / 189

页数：7

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