Interlayer coupling between Fe3O4 layers separated by an insulating nonmagnetic MgO layer

被引：63

作者：

vanderHeijden, PAA ^{[1
]}

Bloemen, PJH ^{[1
]}

Metselaar, JM ^{[1
]}

Wolf, RM ^{[1
]}

Gaines, JM ^{[1
]}

vanEemeren, JTWM ^{[1
]}

vanderZaag, PJ ^{[1
]}

deJonge, WJM ^{[1
]}

机构：

[1] PHILIPS RES LABS,NL-5656 AA EINDHOVEN,NETHERLANDS

来源：

PHYSICAL REVIEW B | 1997年 / 55卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.55.11569

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetic interlayer coupling between two magnetic layers separated by an insulator was investigated on Co0.2Fe2.8O4/Fe3O4/MgO/Fe3O4 samples grown by means of molecular beam epitaxy on (001) MgAl2O4 substrates. The samples were designed to observe interlayer coupling of either sign. Hysteresis loop measurements show that the Fe3O4 layers are ferromagnetically coupled in the thickness range 0-45 nm MgO. Below a MgO spacer thickness of 1.3 nm, the coupling strength increases drastically with decreasing MgO thickness and is ascribed to the existence of ferromagnetic bridges through the MgO spacer. The small ferromagnetic coupling above 1.3 nm seems to arise from a magnetostatic coupling due to correlated interface irregularities.

引用

页码：11569 / 11575

页数：7

共 19 条

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