On the intermediate peak in melt textured YBa2Cu3Oy superconductors
作者： E.Sudhakar Reddy , K.D. Otzschi , J. Shimoyama , K. Kishio
DOI: 10.1016/S0921-4534(01)00296-9
关键词: Materials science 、 Field (physics) 、 Magnetization 、 Magnetic hysteresis 、 Praseodymium 、 Condensed matter physics 、 Microstructure 、 Superconductivity 、 Flux pinning 、 Oxide
摘要: Abstract The magnetic hysteresis loops were studied on Pr6O11 added top-seeded melt grown YBa2Cu3Oy (Y123) superconductors. By tailoring the flux pinning sites by praseodymium oxide additions, for first time, a pronounced intermediate peak was observed in magnetisation textured Y123 material. position of to shift towards lower fields with decreasing temperature contrast fish-tail where field at which appears increases temperature. origin is assigned as due matching effect from Pr-substituted regions matrix. nature and conditions, favoured appearance reasons its temperature, are discussed. A schematic model, based dependent centres, proposed explain
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