Evidence for roughness driven 90° coupling in Fe3O4/NiO/Fe3O4 trilayers

被引：68

作者：

van der Heijden, PAA

Swüste, CHW

de Jonge, WJM

Gaines, JM

van Eemeren, JTWM

Schep, KM

机构：

[1] Eindhoven Univ Technol, COBRA, Interuniv Res Inst, Dept Phys, NL-5600 MB Eindhoven, Netherlands

[2] Philips Res Labs, NL-5656 AA Eindhoven, Netherlands

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.82.1020

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The magnetic interlayer coupling of Fe3O4 across NiO is studied using Fe3O4/NiO/Fe3O4 trilayers epitaxially grown on (001) MgO substrates. For NiO thicknesses between 0.7 and 5 nm, the magnetic moments of the two Fe3O4 layers are directed perpendicularly with respect to each other. The 90 degrees coupling strength is determined to be 0.35 +/- 0.08 mJ/m(2) for a 1.4-nm-thick NiO spacer. The 90 degrees coupling can be understood from the effect of an antiferromagnetic spacer in the presence of interface roughness.

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页码：1020 / 1023

页数：4

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