Vortex Pinning Properties at Grain Boundary in SmBa2Cu3Oy Superconducting Films with BaHfO3 Nanorods Controlled via Low-Temperature Growth

Shun Miura, Yusuke Ichino, Yutaka Yoshida, Ataru Ichinose, Akihiro Tsuruta

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Abstract

We investigated the effect of the BaHfO3 (BHO) nanorods' configuration on transport properties at artificial grain boundaries (GBs) in SmBa2Cu3Oy (SmBCO) superconducting films. To control the nanorods' configuration at the GBs, we deposited 3.0 vol.% BHO-doped SmBCO films on 5° [001]-tilt bicrystal (LaAlO3)0.3(SrAl0.5Ta0.5O3)0.7 substrates at relatively low growth temperature of 750 °C via the pulsed laser deposition method adopting a seed layer technique. According to the transport results, the critical current density (Jc) at the GBs was improved in the films with the nanorods at low magnetic fields. In addition, field angular dependence of Jc was also improved for a wide range of field directions with a broad peak for B//c. We estimated that the BHO nanorods in the GBs pinned the Abrikosov-Josephson (AJ) vortices with various directions in the GBs. AJ vortex pinning can be controlled by configuration of a pinning center at GB.

Original languageEnglish
Article number7781616
JournalIEEE Transactions on Applied Superconductivity
Volume27
Issue number4
DOIs
Publication statusPublished - Jun 2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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