Oscillatory magnetic relaxation in Bi₂Sr₂CaCu₂O_8+δ

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• 作者：D. Barness ; I. Sochnikov ; B. Kalisky ; A. Shaulov ; Y. Yeshurun
• 关键词：Vortex matter ; Magneto optical imaging ; Magnetic relaxation ; Order– ; disorder transition
• 刊名：Physica C
• 出版年：2008
• 出版时间：15 February 2008
• 年：2008
• 卷：468
• 期：4
• 页码：280-283
• 全文大小：364 K

文摘

Time-resolved magneto optical measurements in Bi₂Sr₂CaCu₂O_8+δ show oscillatory relaxation of the local magnetization. The oscillatory behaviour is observed in a limited range of temperatures and fields below the vortex order–disorder phase transition line. We ascribe this phenomenon to coupled effects of thermally activated flux creep and annealing of transient disordered vortex states injected into the sample during field increase.