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Enhancement of flux-line pinning in all-oxide superconductor/ferromagnet heterostructures

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arxiv cond-mat/0401033 v1 pith:WXA63XWV submitted 2004-01-05 cond-mat.supr-con cond-mat.str-el

Enhancement of flux-line pinning in all-oxide superconductor/ferromagnet heterostructures

classification cond-mat.supr-con cond-mat.str-el
keywords superconductorall-oxideascribedbilayerconsistingcriticalcurrentdensity
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We have studied the local critical current density, jc, in the superconductor thin film of bilayer structures consisting of YBa2Cu3O7 and the ferromagnets La2/3Ca1/3MnO3 and SrRuO3, respectively, by means of quantitative magneto-optics. A pronounced hysteresis of jc was observed which is ascribed to the magnetization state of the ferromagnetic layer. The results are discussed within the frame of magnetic vortex - wall interactions.

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