Magneto-optical characterizations of FeTe0.5Se0.5 thin films with critical current density over 1 MA cm-2

Yue Sun; Yuji Tsuchiya; Sunseng Pyon; Tsuyoshi Tamegai; Cheng Zhang; Toshinori Ozaki; Qiang Li

doi:10.1088/0953-2048/28/1/015010

Magneto-optical characterizations of FeTe_0.5Se_0.5 thin films with critical current density over 1 MA cm^-2

Yue Sun
, Yuji Tsuchiya
, Sunseng Pyon
, Tsuyoshi Tamegai
, Cheng Zhang
, Toshinori Ozaki
, Qiang Li

Physics and Astronomy

The University of Tokyo
Brookhaven National Laboratory Condensed Matter Physics and Materials Science Department

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

15 Scopus citations

Abstract

We performed magneto-optical (MO) measurements on FeTe_0.5Se_0.5 thin films grown on LaAlO₃ (LAO) and Yttria-stabilized zirconia (YSZ) single-crystalline substrates. These thin films show superconducting transition temperature T_c ∼19 K, 4 K higher than the bulk sample. Typical roof-top patterns can be observed in the MO images of thin films grown on LAO and YSZ, from which a large and homogeneous critical current density J_c over at 5 K was obtained. Magnetic flux penetration measurement reveals that the current is almost isotropically distributed in the two thin films. Compared with bulk crystals, FeTe_0.5Se_0.5 thin film demonstrates not only higher T_c, but also much larger J_c, which is attractive for applications.

Original language	English
Article number	015010
Journal	Superconductor Science and Technology
Volume	28
Issue number	1
DOIs	https://doi.org/10.1088/0953-2048/28/1/015010
State	Published - Jan 1 2015

Keywords

iron-based superconductors
Magneto-optical imaging
thin film

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10.1088/0953-2048/28/1/015010

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title = "Magneto-optical characterizations of FeTe0.5Se0.5 thin films with critical current density over 1 MA cm-2 ",

abstract = "We performed magneto-optical (MO) measurements on FeTe0.5Se0.5 thin films grown on LaAlO3 (LAO) and Yttria-stabilized zirconia (YSZ) single-crystalline substrates. These thin films show superconducting transition temperature Tc ∼19 K, 4 K higher than the bulk sample. Typical roof-top patterns can be observed in the MO images of thin films grown on LAO and YSZ, from which a large and homogeneous critical current density Jc over at 5 K was obtained. Magnetic flux penetration measurement reveals that the current is almost isotropically distributed in the two thin films. Compared with bulk crystals, FeTe0.5Se0.5 thin film demonstrates not only higher Tc, but also much larger Jc, which is attractive for applications.",

keywords = "iron-based superconductors, Magneto-optical imaging, thin film",

author = "Yue Sun and Yuji Tsuchiya and Sunseng Pyon and Tsuyoshi Tamegai and Cheng Zhang and Toshinori Ozaki and Qiang Li",

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T1 - Magneto-optical characterizations of FeTe0.5Se0.5 thin films with critical current density over 1 MA cm-2

AU - Sun, Yue

AU - Tsuchiya, Yuji

AU - Pyon, Sunseng

AU - Tamegai, Tsuyoshi

AU - Zhang, Cheng

AU - Ozaki, Toshinori

AU - Li, Qiang

PY - 2015/1/1

Y1 - 2015/1/1

N2 - We performed magneto-optical (MO) measurements on FeTe0.5Se0.5 thin films grown on LaAlO3 (LAO) and Yttria-stabilized zirconia (YSZ) single-crystalline substrates. These thin films show superconducting transition temperature Tc ∼19 K, 4 K higher than the bulk sample. Typical roof-top patterns can be observed in the MO images of thin films grown on LAO and YSZ, from which a large and homogeneous critical current density Jc over at 5 K was obtained. Magnetic flux penetration measurement reveals that the current is almost isotropically distributed in the two thin films. Compared with bulk crystals, FeTe0.5Se0.5 thin film demonstrates not only higher Tc, but also much larger Jc, which is attractive for applications.

AB - We performed magneto-optical (MO) measurements on FeTe0.5Se0.5 thin films grown on LaAlO3 (LAO) and Yttria-stabilized zirconia (YSZ) single-crystalline substrates. These thin films show superconducting transition temperature Tc ∼19 K, 4 K higher than the bulk sample. Typical roof-top patterns can be observed in the MO images of thin films grown on LAO and YSZ, from which a large and homogeneous critical current density Jc over at 5 K was obtained. Magnetic flux penetration measurement reveals that the current is almost isotropically distributed in the two thin films. Compared with bulk crystals, FeTe0.5Se0.5 thin film demonstrates not only higher Tc, but also much larger Jc, which is attractive for applications.

KW - iron-based superconductors

KW - Magneto-optical imaging

KW - thin film

UR - https://www.scopus.com/pages/publications/84921048026

U2 - 10.1088/0953-2048/28/1/015010

DO - 10.1088/0953-2048/28/1/015010

M3 - Article

AN - SCOPUS:84921048026

SN - 0953-2048

VL - 28

JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

IS - 1

M1 - 015010

ER -

Magneto-optical characterizations of FeTe_0.5Se_0.5 thin films with critical current density over 1 MA cm^-2

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Keywords

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