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Fabrication of high-entropy REBa2Cu3O7-d thin films by pulsed laser deposition

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arxiv 2112.06378 v1 pith:VWUGJETN submitted 2021-12-13 cond-mat.supr-con cond-mat.mtrl-sci

classification cond-mat.supr-concond-mat.mtrl-sci
keywords filmsdepositionentropyhighirradiationlaserpulsedre123
verification ladder T0 review T1 audit T2 compute T3 formal
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Epitaxial thin films of REBa2Cu3O7-d (RE123, RE: rare earth) having a high entropy (HE) RE site were successfully fabricated on a SrTiO3 substrate by the pulsed laser deposition method. One to five RE elements are solved at the RE site, which results in an increase in configurational entropy of mixing (dSmix). Through the measurements of critical current density (Jc) by a magnetization and the Bean's model analysis, we found that the Jc of the HE films exceeds an order of 1.0 MA/cm2 under conditions of T < 20 K and H < 7 T. Since the HE effects have a potential to an improvement of irradiation tolerance, the present results encourage further development of HE RE123 superconducting materials for a practical use in the environment with high magnetic fields and irradiation, for example in fusion reactors.

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