Low-temperature synthesis of FeTe0.5Se0.5 polycrystals with a high transport critical current density

Qing Ping Ding; Shyam Mohan; Yuji Tsuchiya; Toshihiro Taen; Yasuyuki Nakajima; Tsuyoshi Tamegai

doi:10.1088/0953-2048/24/7/075025

Low-temperature synthesis of FeTe_0.5Se_0.5 polycrystals with a high transport critical current density

Qing Ping Ding, Shyam Mohan, Yuji Tsuchiya, Toshihiro Taen, Yasuyuki Nakajima, Tsuyoshi Tamegai

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

We have prepared high-quality polycrystalline FeTe_0.5Se _0.5 at temperature as low as 550 °C. The transport critical current density evaluated from the current-voltage characteristics is over 700Acm^{- 2} at 4.2K under zero field, which is several times larger than that for FeTe_0.5Se_0.5 superconducting wires. The critical current density estimated from magneto-optical images of flux penetration is also similar to this value. The upper critical field of the polycrystalline FeTe_0.5Se_0.5 at T = 0K estimated using Werthamer-Helfand-Hohenberg theory is 585kOe, which is comparable to that of single crystals. This study gives some insight into how to improve the performance of FeTe_0.5Se_0.5 superconducting wires.

Original language	English
Article number	075025
Journal	Superconductor Science and Technology
Volume	24
Issue number	7
DOIs	https://doi.org/10.1088/0953-2048/24/7/075025
Publication status	Published - 2011 Jul
Externally published	Yes

ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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10.1088/0953-2048/24/7/075025

Cite this

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title = "Low-temperature synthesis of FeTe0.5Se0.5 polycrystals with a high transport critical current density",

abstract = "We have prepared high-quality polycrystalline FeTe0.5Se 0.5 at temperature as low as 550 °C. The transport critical current density evaluated from the current-voltage characteristics is over 700Acm- 2 at 4.2K under zero field, which is several times larger than that for FeTe0.5Se0.5 superconducting wires. The critical current density estimated from magneto-optical images of flux penetration is also similar to this value. The upper critical field of the polycrystalline FeTe0.5Se0.5 at T = 0K estimated using Werthamer-Helfand-Hohenberg theory is 585kOe, which is comparable to that of single crystals. This study gives some insight into how to improve the performance of FeTe0.5Se0.5 superconducting wires.",

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T1 - Low-temperature synthesis of FeTe0.5Se0.5 polycrystals with a high transport critical current density

AU - Ding, Qing Ping

AU - Mohan, Shyam

AU - Tsuchiya, Yuji

AU - Taen, Toshihiro

AU - Nakajima, Yasuyuki

AU - Tamegai, Tsuyoshi

PY - 2011/7

Y1 - 2011/7

N2 - We have prepared high-quality polycrystalline FeTe0.5Se 0.5 at temperature as low as 550 °C. The transport critical current density evaluated from the current-voltage characteristics is over 700Acm- 2 at 4.2K under zero field, which is several times larger than that for FeTe0.5Se0.5 superconducting wires. The critical current density estimated from magneto-optical images of flux penetration is also similar to this value. The upper critical field of the polycrystalline FeTe0.5Se0.5 at T = 0K estimated using Werthamer-Helfand-Hohenberg theory is 585kOe, which is comparable to that of single crystals. This study gives some insight into how to improve the performance of FeTe0.5Se0.5 superconducting wires.

AB - We have prepared high-quality polycrystalline FeTe0.5Se 0.5 at temperature as low as 550 °C. The transport critical current density evaluated from the current-voltage characteristics is over 700Acm- 2 at 4.2K under zero field, which is several times larger than that for FeTe0.5Se0.5 superconducting wires. The critical current density estimated from magneto-optical images of flux penetration is also similar to this value. The upper critical field of the polycrystalline FeTe0.5Se0.5 at T = 0K estimated using Werthamer-Helfand-Hohenberg theory is 585kOe, which is comparable to that of single crystals. This study gives some insight into how to improve the performance of FeTe0.5Se0.5 superconducting wires.

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Low-temperature synthesis of FeTe_0.5Se_0.5 polycrystals with a high transport critical current density

Abstract

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