A new kind of vortex pinning in superconductor / ferromagnet nanocomposites
A. Palau, H. Parvaneh, N.A. Stelmashenko, H. Wang J. L., Macmanus-Driscoll, M.G. Blamire
TL;DR
This study discovers a novel hysteretic vortex pinning mechanism in superconductor/ferromagnet nanocomposites caused by magnetic reversal losses in Gd particles, differing from traditional pinning interactions.
Contribution
It introduces a new type of vortex pinning in superconductor/ferromagnet nanocomposites linked to magnetic reversal losses, expanding understanding of vortex dynamics.
Findings
Hysteresis observed in vortex pinning due to magnetic reversal in Gd particles
Hysteretic pinning is fundamentally different from previous microstructural pinning
Magnetic reversal losses cause the unique pinning behavior
Abstract
This paper reports the observation of hysteresis in the vortex pinning in a superconductor / ferromagnetic epitaxial nanocomposite consisting of fcc Gd particles incorporated in a Nb matrix. We show that this hysteretic pinning is associated with magnetic reversal losses in the Gd particles and is fundamentally different in origin to pinning interactions previously observed for ferromagnetic particles or other microstructural features.
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