CONCURRENT ENHANCEMENT OF KERR ROTATION AND ANTIFERROMAGNETIC COUPLING IN EPITAXIAL FE/CU/FE STRUCTURES

被引:2
作者
BENNETT, WR
SCHWARZACHER, W
EGELHOFF, WF
机构
[1] Surface Science Division, N.I.S.T., Gaithersburg
关键词
D O I
10.1063/1.350093
中图分类号
O59 [应用物理学];
学科分类号
摘要
We have used the polar Kerr effect to investigate the magnetic coupling between two 3-monolayer (ML)-thick ferromagnetic fcc-Fe films separated by a Cu spacer layer in epitaxial Cu60Fe3CuxFe 3Cu(100) structures specially prepared to have atomically sharp interfaces. We have observed concurrent oscillations in the interlayer exchange coupling strength and the zero-ellipticity polar Kerr rotation as a function of x. The oscillation in exchange coupling covers at least four periods (x=0-30 ML), and has a phase consistent with antiferromagnetic coupling in the limit of zero-Cu-spacer-layer thickness. Preliminary evidence indicates that the oscillation in exchange coupling is not only in magnitude, but may involve alternation between antiferromagnetic and ferromagnetic states. We note the similarity between two distinct magnetic/nonmagnetic layered systems: Co/Ru 1 and our Fe/Cu/Fe, both of which exhibit oscillations in the magnitude of the exchange coupling with periods of ∼7 ML, and have phases consistent with antiferromagnetic coupling in the limit of zero-spacer-layer thickness. Finally, our samples exhibit a major enhancement in the Kerr rotation over that expected on the basis of plasma resonant absorption. Close correlation of this enhancement with the strength of the interlayer magnetic coupling suggests a common mechanism for these effects.
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页码:5881 / 5881
页数:1
相关论文
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[1]   OSCILLATIONS IN EXCHANGE COUPLING AND MAGNETORESISTANCE IN METALLIC SUPERLATTICE STRUCTURES - CO/RU, CO/CR, AND FE/CR [J].
PARKIN, SSP ;
MORE, N ;
ROCHE, KP .
PHYSICAL REVIEW LETTERS, 1990, 64 (19) :2304-2307