Inter-granular current in iron-oxypnictide superconductors

T. Tamegai; Y. Tsuchiya; Y. Nakajima; Y. Kamihara; H. Hosono

doi:10.1016/j.physc.2010.05.018

Inter-granular current in iron-oxypnictide superconductors

T. Tamegai, Y. Tsuchiya, Y. Nakajima, Y. Kamihara, H. Hosono

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

3 Citations (Scopus)

Abstract

Inter- and intra-granular currents, J_c^inter and J_c^intra, in LaFePO_0.94F_0.06 polycrystalline sample are evaluated by measuring the remanent-state field profile using magneto-optical imaging method. Obtained images show the absence of magnetic field modulation associated with the weak-link nature of grain boundaries, indicating that J_c^inter and J_c ^intra are comparable in magnitude in contrast to other iron-arsenide superconductors. J_c^inter is estimated to be 2 × 10⁴ A/cm² in the limit of T= 0 K, which is larger than the values in other iron-arsenide superconductors. Implication of these J _c behavior is discussed in relation with possible pairing symmetries.

Original language	English
Pages (from-to)	993-995
Number of pages	3
Journal	Physica C: Superconductivity and its applications
Volume	470
Issue number	20
DOIs	https://doi.org/10.1016/j.physc.2010.05.018
Publication status	Published - 2010 Nov 1
Externally published	Yes

Keywords

Inter-granular critical current
Iron-oxypnictide
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.2010.05.018

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title = "Inter-granular current in iron-oxypnictide superconductors",

abstract = "Inter- and intra-granular currents, Jcinter and Jcintra, in LaFePO0.94F0.06 polycrystalline sample are evaluated by measuring the remanent-state field profile using magneto-optical imaging method. Obtained images show the absence of magnetic field modulation associated with the weak-link nature of grain boundaries, indicating that Jcinter and Jc intra are comparable in magnitude in contrast to other iron-arsenide superconductors. Jcinter is estimated to be 2 × 104 A/cm2 in the limit of T= 0 K, which is larger than the values in other iron-arsenide superconductors. Implication of these J c behavior is discussed in relation with possible pairing symmetries.",

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author = "T. Tamegai and Y. Tsuchiya and Y. Nakajima and Y. Kamihara and H. Hosono",

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T1 - Inter-granular current in iron-oxypnictide superconductors

AU - Tamegai, T.

AU - Tsuchiya, Y.

AU - Nakajima, Y.

AU - Kamihara, Y.

AU - Hosono, H.

PY - 2010/11/1

Y1 - 2010/11/1

N2 - Inter- and intra-granular currents, Jcinter and Jcintra, in LaFePO0.94F0.06 polycrystalline sample are evaluated by measuring the remanent-state field profile using magneto-optical imaging method. Obtained images show the absence of magnetic field modulation associated with the weak-link nature of grain boundaries, indicating that Jcinter and Jc intra are comparable in magnitude in contrast to other iron-arsenide superconductors. Jcinter is estimated to be 2 × 104 A/cm2 in the limit of T= 0 K, which is larger than the values in other iron-arsenide superconductors. Implication of these J c behavior is discussed in relation with possible pairing symmetries.

AB - Inter- and intra-granular currents, Jcinter and Jcintra, in LaFePO0.94F0.06 polycrystalline sample are evaluated by measuring the remanent-state field profile using magneto-optical imaging method. Obtained images show the absence of magnetic field modulation associated with the weak-link nature of grain boundaries, indicating that Jcinter and Jc intra are comparable in magnitude in contrast to other iron-arsenide superconductors. Jcinter is estimated to be 2 × 104 A/cm2 in the limit of T= 0 K, which is larger than the values in other iron-arsenide superconductors. Implication of these J c behavior is discussed in relation with possible pairing symmetries.

KW - Inter-granular critical current

KW - Iron-oxypnictide

KW - Magneto-optical imaging

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Inter-granular current in iron-oxypnictide superconductors

Abstract

Keywords

ASJC Scopus subject areas

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