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Article

Effect of 1.5 MeV Proton Irradiation on Superconductivity in FeSe0.5Te0.5 Thin Films

by
Toshinori Ozaki
1,*,
Takuya Kashihara
1,
Itsuhiro Kakeya
2 and
Ryoya Ishigami
3
1
Department of Nanotechnology for Sustainable Energy, Kwansei Gakuin University, 2-1 Gakuen, Sanda 669-1337, Japan
2
Department of Electronic Science and Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
3
The Wakasa Wan Energy Research Center, Nagatani, Tsuruga 914-0192, Japan
*
Author to whom correspondence should be addressed.
Quantum Beam Sci. 2021, 5(2), 18; https://doi.org/10.3390/qubs5020018
Submission received: 31 March 2021 / Revised: 4 May 2021 / Accepted: 25 May 2021 / Published: 4 June 2021
(This article belongs to the Special Issue The Modifications of Metallic and Inorganic Materials by Using Energetic Ion/Electron Beams)
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Abstract

Raising the critical current density Jc in magnetic fields is crucial to applications such as rotation machines, generators for wind turbines and magnet use in medical imaging machines. The increase in Jc has been achieved by introducing structural defects including precipitates and vacancies. Recently, a low-energy ion irradiation has been revisited as a practically feasible approach to create nanoscale defects, resulting in an increase in Jc in magnetic fields. In this paper, we report the effect of proton irradiation with 1.5 MeV on superconducting properties of iron–chalcogenide FeSe0.5Te0.5 films through the transport and magnetization measurements. The 1.5 MeV proton irradiation with 1 × 1016 p/cm2 yields the highest Jc increase, approximately 30% at 5–10 K and below 1 T without any reduction in Tc. These results indicate that 1.5 MeV proton irradiations could be a practical tool to enhance the performance of iron-based superconducting tapes under magnetic fields.
Keywords: superconductor; irradiation; critical current superconductor; irradiation; critical current

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MDPI and ACS Style

Ozaki, T.; Kashihara, T.; Kakeya, I.; Ishigami, R. Effect of 1.5 MeV Proton Irradiation on Superconductivity in FeSe0.5Te0.5 Thin Films. Quantum Beam Sci. 2021, 5, 18. https://doi.org/10.3390/qubs5020018

AMA Style

Ozaki T, Kashihara T, Kakeya I, Ishigami R. Effect of 1.5 MeV Proton Irradiation on Superconductivity in FeSe0.5Te0.5 Thin Films. Quantum Beam Science. 2021; 5(2):18. https://doi.org/10.3390/qubs5020018

Chicago/Turabian Style

Ozaki, Toshinori, Takuya Kashihara, Itsuhiro Kakeya, and Ryoya Ishigami. 2021. "Effect of 1.5 MeV Proton Irradiation on Superconductivity in FeSe0.5Te0.5 Thin Films" Quantum Beam Science 5, no. 2: 18. https://doi.org/10.3390/qubs5020018

APA Style

Ozaki, T., Kashihara, T., Kakeya, I., & Ishigami, R. (2021). Effect of 1.5 MeV Proton Irradiation on Superconductivity in FeSe0.5Te0.5 Thin Films. Quantum Beam Science, 5(2), 18. https://doi.org/10.3390/qubs5020018

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