Influence of antiferromagnetic interlayer on the exchange coupling of FM1/AFM/FM2 multilayers

The effect of spin configuration of ferromagnetic (FM1)/antiferromagnetic (AFM) bilayer on the exchange bias of AFM/FM2 bilayer has been investigated in series of designed FM1/AFM/FM2 trilayers. Field cooling of the magnetic sandwich layers, with parallel or antiparallel alignment of the two FM laye...

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Veröffentlicht in:Journal of magnetism and magnetic materials 2013-10, Vol.344, p.35-38
Hauptverfasser: Guo, S., Liu, W., Liu, X.H., Gong, W.J., Li, Bo, Feng, J.N., Zhang, Z.D.
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Sprache:eng
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Zusammenfassung:The effect of spin configuration of ferromagnetic (FM1)/antiferromagnetic (AFM) bilayer on the exchange bias of AFM/FM2 bilayer has been investigated in series of designed FM1/AFM/FM2 trilayers. Field cooling of the magnetic sandwich layers, with parallel or antiparallel alignment of the two FM layers, lead to a different interfacial spin configuration and internal AFM domain state. Minor magnetic hysteresis loops show that when the AFM layer is thin enough, the exchange-bias effect after field cooling with parallel and anti-parallel spin configuration is different. When the AFM layer is thick enough, it is difficult to observe the interaction between the spin configuration of FM1/AFM bilayer and the exchange-bias effect of AFM/FM2 bilayer. The AFM layer-thickness dependence on the exchange interaction of other FM layers, mediated by the AFM layer, can be interpreted by the domain state model. •The AFM layer is reordered below its blocking temperature with saturated FM layers.•The interfacial spin configuration of AFM/FM2 is influenced by that of FM1 layer.•The AFM thickness dependence of exchange interaction has been interpreted.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2013.05.028