Hysteretic vortex pinning in superconductor-ferromagnet nanocomposites.
作者信息
Palau A, Parvaneh H, Stelmashenko N A, Wang H, Macmanus-Driscoll J L, Blamire M G
机构信息
Department of Materials Science, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ, United Kingdom.
出版信息
Phys Rev Lett. 2007 Mar 16;98(11):117003. doi: 10.1103/PhysRevLett.98.117003. Epub 2007 Mar 14.
Abstract
This Letter 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.
摘要
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