Non-planar spin texture driven dissipation in a ferromagnet-superconductor bilayer

Singh, Gyanendra ; Joshi, P. C. ; Budhani, R. C. (2012) Non-planar spin texture driven dissipation in a ferromagnet-superconductor bilayer Physica C: Superconductivity, 472 (1). pp. 44-49. ISSN 0921-4534

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.physc.2011.09.014

Abstract

We report the observation of a pronounced dip in the in-plane magnetic field (HII) dependence of the critical current density Jc(H) and a peak in resistance R(H) of a NbN-HoNi5 bilayer at temperatures below the magnetic ordering temperature (TCurie ≈ 3.5 K) of HoNi5, which is lower than the onset temperature (≈9 K) of superconductivity in the NbN layer. The extrema in Jc(H) and R(H) appear at fields much below the upper critical field of NbN. We attribute these features to a coupling between localized out-of-plane moments present in the magnetic film and Pearl vortices of the superconducting layer. A spin re-orientation transition of the localized moments by HII breaks this coupling, leading to the observed excess dissipation.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Spin Reorientation Transition; Superconductor-ferromagnet Heterostructures; Vortex Pinning
ID Code:87794
Deposited On:22 Mar 2012 07:50
Last Modified:22 Mar 2012 07:50

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