Effect of ion irradiation on surface morphology and superconductivity of BaFe₂(As_1−xP_x)₂ films

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• 作者：D. Daghero^a ; ^{dario.daghero@polito.it} ; M. Tortello^a ; L. Gozzelino^a ; ^b ; R.S. Gonnelli^a ; T. Hatano^c ; T. Kawaguchi^c ; H. Ikuta^c
• 关键词：Iron-based superconductors ; Thin films ; Irradiation ; Surface characterization ; Transport properties
• 刊名：Applied Surface Science
• 出版年：2017
• 出版时间：15 February 2017
• 年：2017
• 卷：395
• 期：Complete
• 页码：9-15
• 全文大小：2676 K
• 卷排序：395

文摘

Epitaxial films of BaFe2(As,P)2 at optimal doping on MgO substrate have been irradiated by 250 MeV Au ions with different fluences. Irradiation induces a partial relaxation of the in-plane tensile stress typical of the pristine films. The residual resistivity increases less than linearly with fluence, tending to saturate; the overall increase is about 60%, but the critical temperature decreases by only 2%. These results indicate that the substrate and the reduced dimensionality of the films (as compared to the case of single crystals) play an important role in their response to irradiation.