Magneto-optical imaging of iron-oxypnictide superconductor LaFeAs(O,F)

Yasuyuki Nakajima; Toshihide Maruoka; Tsuyoshi Tamegai; Yoichi Kamihara; Masahiro Hirano; Hideo Hosono

doi:10.1016/j.physc.2009.10.102

Magneto-optical imaging of iron-oxypnictide superconductor LaFeAs(O,F)

Yasuyuki Nakajima, Toshihide Maruoka, Tsuyoshi Tamegai, Yoichi Kamihara, Masahiro Hirano, Hideo Hosono

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

4 Citations (Scopus)

Abstract

We report the magneto-optical imaging for polycrystalline LaFeAsO _0.95F_0.05 and LaFeAsO_0.892F_0.108. We find a significant magneto-optical contrast with marked inhomogeneities and with a typical superconducting grain size ∼20-40 μm. Although intergrain critical current density is negligibly small, intragrain critical current density obtained from magneto-optical image is about 1 × 10⁵ A/cm² at 5 K, which is smaller than other rare-earth-based iron-oxypnictide superconductors but is potentially attractive for technological applications.

Original language	English
Pages (from-to)	S406-S407
Journal	Physica C: Superconductivity and its applications
Volume	470
Issue number	SUPPL.1
DOIs	https://doi.org/10.1016/j.physc.2009.10.102
Publication status	Published - 2010 Dec
Externally published	Yes

Keywords

Critical current density
Iron-oxypnictides
Magneto-optical imaging

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/j.physc.2009.10.102

Cite this

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title = "Magneto-optical imaging of iron-oxypnictide superconductor LaFeAs(O,F)",

abstract = "We report the magneto-optical imaging for polycrystalline LaFeAsO 0.95F0.05 and LaFeAsO0.892F0.108. We find a significant magneto-optical contrast with marked inhomogeneities and with a typical superconducting grain size ∼20-40 μm. Although intergrain critical current density is negligibly small, intragrain critical current density obtained from magneto-optical image is about 1 × 105 A/cm2 at 5 K, which is smaller than other rare-earth-based iron-oxypnictide superconductors but is potentially attractive for technological applications.",

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year = "2010",

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T1 - Magneto-optical imaging of iron-oxypnictide superconductor LaFeAs(O,F)

AU - Nakajima, Yasuyuki

AU - Maruoka, Toshihide

AU - Tamegai, Tsuyoshi

AU - Kamihara, Yoichi

AU - Hirano, Masahiro

AU - Hosono, Hideo

PY - 2010/12

Y1 - 2010/12

N2 - We report the magneto-optical imaging for polycrystalline LaFeAsO 0.95F0.05 and LaFeAsO0.892F0.108. We find a significant magneto-optical contrast with marked inhomogeneities and with a typical superconducting grain size ∼20-40 μm. Although intergrain critical current density is negligibly small, intragrain critical current density obtained from magneto-optical image is about 1 × 105 A/cm2 at 5 K, which is smaller than other rare-earth-based iron-oxypnictide superconductors but is potentially attractive for technological applications.

AB - We report the magneto-optical imaging for polycrystalline LaFeAsO 0.95F0.05 and LaFeAsO0.892F0.108. We find a significant magneto-optical contrast with marked inhomogeneities and with a typical superconducting grain size ∼20-40 μm. Although intergrain critical current density is negligibly small, intragrain critical current density obtained from magneto-optical image is about 1 × 105 A/cm2 at 5 K, which is smaller than other rare-earth-based iron-oxypnictide superconductors but is potentially attractive for technological applications.

KW - Critical current density

KW - Iron-oxypnictides

KW - Magneto-optical imaging

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Magneto-optical imaging of iron-oxypnictide superconductor LaFeAs(O,F)

Abstract

Keywords

ASJC Scopus subject areas

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