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http://dx.doi.org/10.9714/psac.2017.19.3.023

Anomalous superconducting spin-valve effect in NbN/FeN/Cu/FeN/FeMn multilayers  

Hwang, Tae Jong (Yeungnam University)
Kim, Dong Ho (Yeungnam University)
Publication Information
Progress in Superconductivity and Cryogenics / v.19, no.3, 2017 , pp. 23-26 More about this Journal
Abstract
We have studied magnetic and transport properties of NbN/FeN/Cu/FeN/FeMn spin-valve structure. In-plane magnetic moment exhibited typical hysteresis loops of spin valves in the normal state of NbN film at 20 K. On the other hand, the magnetic hysteresis loop in the superconducting state exhibited more complex behavior in which exchange bias provided by antiferrmagnetic FeMn layer to adjacent FeN layer was disturbed by superconductivity. Because of this, the ideal superconducting spin-valve effect was not detected. Instead the stray field originated from unsaturated magnetic states dominated the transport properties of NbN/FeN/Cu/FeN/FeMn multilayer.
Keywords
magnetoresistance; spin valve; NbN/FeN multilayer;
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