Critical adsorption and dimensional crossover in epitaxial FeCo films

被引：14

作者：

Nickel, B ^{[1
]}

Donner, W

Dosch, H

Detlefs, C

Grübel, G

机构：

[1] Max Planck Inst Met Forsch, D-70569 Stuttgart, Germany

[2] Univ Stuttgart, Inst Theoret & Angew Phys, D-70569 Stuttgart, Germany

[3] European Synchrotron Radiat Facil, F-38042 Grenoble, France

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 01期

关键词：

Adsorption - Epitaxial growth - Iron alloys - Magnesia - Phase interfaces - Temperature - Thin films - Three dimensional - Two dimensional - X ray diffraction;

D O I：

10.1103/PhysRevLett.85.134

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The critical behavior of thin FeCo films grown on MgO has been studied using phase-sensitive synchrotron x-ray diffractian. These studies unravel several novel features of criticality in thin films, as the simultaneous appearance of the 3D-2D crossover and the truncation of the correlation length normal to the film at approximately 1/3 of the film thickness. Above the critical temperature of the film we observe a pronounced pinning of the order parameter at the MgO-FeCo interface, which indicates a novel critical adsorption behavior.

引用

页码：134 / 137

页数：4

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