SUPPRESSION OF BIQUADRATIC COUPLING IN FE/CR(001) SUPERLATTICES BELOW THE NEEL TRANSITION OF CR

被引：121

作者：

FULLERTON, EE

RIGGS, KT

SOWERS, CH

BADER, SD

BERGER, A

机构：

[1] STETSON UNIV,DE LAND,FL 32720

[2] UNIV CALIF IRVINE,DEPT PHYS,IRVINE,CA 92717

[3] UNIV CALIF IRVINE,INST SURFACE & INTERFACE SCI,IRVINE,CA 92717

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.75.330

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Néel temperature (TN) of Cr in sputtered, epitaxial Fe /Cr(001) superlattices is identified via transport and magnetic anomalies. The onset of the antiferromagnetism is at a thickness tCr of 42 Å. The bulk value of TN is approached asymptotically as tCr increases and is characterized by a three-dimensional shift exponent. Most strikingly, the biquadratic interlayer magnetic coupling (90° orientation of adjacent Fe layers), observed in the thick Cr regime, is suppressed below TN. These results are attributed to finite-size effects and spin frustration near rough Fe-Cr interfaces. © 1995 The American Physical Society.

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页码：330 / 333

页数：4

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