Effects of proton irradiation on flux-pinning properties of underdoped Ba(Fe_0.96Co_0.04)₂As₂ pnictide superconductor

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• 作者：S. Salem-Sugui Jr.^a ; ^{said@if.ufrj.br} ; D. Moseley^b ; S.J. Stuard^a ; A.D. Alvarenga^c ; A.S. Sefat^d ; L.F. Cohen^b ; L. Ghivelder^a
• 关键词：Pnictides ; Proton irradiation ; Superconducting critical current ; Flux-pinning
• 刊名：Journal of Alloys and Compounds
• 出版年：2017
• 出版时间：15 February 2017
• 年：2017
• 卷：694
• 期：Complete
• 页码：1371-1375
• 全文大小：1075 K
• 卷排序：694

文摘

The pinning energy U0 and the irreversibility line reduce after proton irradiation. The flux-flow pinning energy U0 is compared with the flux-creep U0 for same samples. Irradiation significantly reduces U0 in the flux-flow and in the flux-creep regimes. A fitting of the irreversibility line shows a reduction of the defects after irradiation. The second magnetisation peak disappears after proton irradiation.