High J c and low anisotropy of hydrogen doped NdFeAsO superconducting thin film

Abstract The recent realisations of hydrogen doped LnFeAsO (Ln = Nd and Sm) superconducting epitaxial thin films call for further investigation of their structural and electrical transport properties. Here, we report on the microstructure of a NdFeAs(O,H) epitaxial thin film and its temperature, fie...

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Autores principales:	Kazumasa Iida, Jens Hänisch, Keisuke Kondo, Mingyu Chen, Takafumi Hatano, Chao Wang, Hikaru Saito, Satoshi Hata, Hiroshi Ikuta
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c2a19a46f01643c68947688753620bdd
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spelling	oai:doaj.org-article:c2a19a46f01643c68947688753620bdd2021-12-02T15:54:05ZHigh J c and low anisotropy of hydrogen doped NdFeAsO superconducting thin film10.1038/s41598-021-85216-32045-2322https://doaj.org/article/c2a19a46f01643c68947688753620bdd2021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-85216-3https://doaj.org/toc/2045-2322Abstract The recent realisations of hydrogen doped LnFeAsO (Ln = Nd and Sm) superconducting epitaxial thin films call for further investigation of their structural and electrical transport properties. Here, we report on the microstructure of a NdFeAs(O,H) epitaxial thin film and its temperature, field, and orientation dependencies of the resistivity and the critical current density J c. The superconducting transition temperature T c is comparable to NdFeAs(O,F). Transmission electron microscopy investigation supported that hydrogen is homogenously substituted for oxygen. A high self-field J c of over 10 MA/cm2 was recorded at 5 K, which is likely to be caused by a short London penetration depth. The anisotropic Ginzburg–Landau scaling for the angle dependence of J c yielded temperature-dependent scaling parameters γJ that decreased from 1.6 at 30 K to 1.3 at 5 K. This is opposite to the behaviour of NdFeAs(O,F). Additionally, γJ of NdFeAs(O,H) is smaller than that of NdFeAs(O,F). Our results indicate that heavily electron doping by means of hydrogen substitution for oxygen in LnFeAsO is highly beneficial for achieving high J c with low anisotropy without compromising T c, which is favourable for high-field magnet applications.Kazumasa IidaJens HänischKeisuke KondoMingyu ChenTakafumi HatanoChao WangHikaru SaitoSatoshi HataHiroshi IkutaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kazumasa Iida Jens Hänisch Keisuke Kondo Mingyu Chen Takafumi Hatano Chao Wang Hikaru Saito Satoshi Hata Hiroshi Ikuta High J c and low anisotropy of hydrogen doped NdFeAsO superconducting thin film
description	Abstract The recent realisations of hydrogen doped LnFeAsO (Ln = Nd and Sm) superconducting epitaxial thin films call for further investigation of their structural and electrical transport properties. Here, we report on the microstructure of a NdFeAs(O,H) epitaxial thin film and its temperature, field, and orientation dependencies of the resistivity and the critical current density J c. The superconducting transition temperature T c is comparable to NdFeAs(O,F). Transmission electron microscopy investigation supported that hydrogen is homogenously substituted for oxygen. A high self-field J c of over 10 MA/cm2 was recorded at 5 K, which is likely to be caused by a short London penetration depth. The anisotropic Ginzburg–Landau scaling for the angle dependence of J c yielded temperature-dependent scaling parameters γJ that decreased from 1.6 at 30 K to 1.3 at 5 K. This is opposite to the behaviour of NdFeAs(O,F). Additionally, γJ of NdFeAs(O,H) is smaller than that of NdFeAs(O,F). Our results indicate that heavily electron doping by means of hydrogen substitution for oxygen in LnFeAsO is highly beneficial for achieving high J c with low anisotropy without compromising T c, which is favourable for high-field magnet applications.
format	article
author	Kazumasa Iida Jens Hänisch Keisuke Kondo Mingyu Chen Takafumi Hatano Chao Wang Hikaru Saito Satoshi Hata Hiroshi Ikuta
author_facet	Kazumasa Iida Jens Hänisch Keisuke Kondo Mingyu Chen Takafumi Hatano Chao Wang Hikaru Saito Satoshi Hata Hiroshi Ikuta
author_sort	Kazumasa Iida
title	High J c and low anisotropy of hydrogen doped NdFeAsO superconducting thin film
title_short	High J c and low anisotropy of hydrogen doped NdFeAsO superconducting thin film
title_full	High J c and low anisotropy of hydrogen doped NdFeAsO superconducting thin film
title_fullStr	High J c and low anisotropy of hydrogen doped NdFeAsO superconducting thin film
title_full_unstemmed	High J c and low anisotropy of hydrogen doped NdFeAsO superconducting thin film
title_sort	high j c and low anisotropy of hydrogen doped ndfeaso superconducting thin film
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/c2a19a46f01643c68947688753620bdd
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High J c and low anisotropy of hydrogen doped NdFeAsO superconducting thin film

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