Bulg. J. Phys. vol.33 no.s3 (2006), pp. 135-142

Interfacial Spin Configuration in Exchange Coupled Magnetic Phases: Exchange-Spring and Exchange-Bias Systems

V. Kuncser1, F. Stromberg2, G. Schinteie1, A. Birsan1, W. Keune2
1National Institute for Materials Physics, P.O. Box MG 7, RO-77125, Bucharest-Magurele, Romania
2Universität Duisburg--Essen, D-47048, Duisburg, Germany
Abstract. The influence of the interfacial spin configuration on specific magnetic phenomena in exchange coupled magnetic phases is briefly discussed. The ability of the 57Fe Mössbauer technique to reveal the spin structures at the interface of iron containing magnetic phases is emphasized for some particular cases. Experimental results obtained on layered exchange-bias systems and on nanocomposites exchange-spring magnets are presented. The influence of the ferromagnetic top layer on the interfacial spin configuration of the bottom antiferromagnetic layer of the Fe/FeSn2 exchange-bias system is illustrated. A possibility for evaluating the inter-phase coupling strength via Mössbauer spectroscopy in Fe/Nd2Fe14B exchange-spring ribbons is described.

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