Magneto-optical imaging of polycrystalline LaFePO1-xF x

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

doi:10.1016/j.physc.2010.01.066

Magneto-optical imaging of polycrystalline LaFePO_1-xF _x

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

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

2 Citations (Scopus)

Abstract

The remanent state field profile has been observed in polycrystalline LaFePO_0.94F_0.06 by magneto-optical (MO) imaging method. MO images show the absence of magnetic field modulation associated with weak-link nature of grain boundaries, indicating that the inter-grain critical current density J_c^inter is comparable to intra-grain critical current density J_c^intra in contrast to iron-arsenide superconductors. J_c^inter is estimated as 1.9 × 10⁴ A/cm² at T = 0 K from magnetization measurement, which is similar to the values in iron-arsenide superconductors. Implication of these J_c behavior is discussed in relation to the possible pairing symmetry.

Original language	English
Pages (from-to)	S300-S301
Journal	Physica C: Superconductivity and its applications
Volume	470
Issue number	SUPPL.1
DOIs	https://doi.org/10.1016/j.physc.2010.01.066
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

Access to Document

10.1016/j.physc.2010.01.066

Cite this

@article{91b98c1e1f714aeabbb8823e293d238a,

title = "Magneto-optical imaging of polycrystalline LaFePO1-xF x",

abstract = "The remanent state field profile has been observed in polycrystalline LaFePO0.94F0.06 by magneto-optical (MO) imaging method. MO images show the absence of magnetic field modulation associated with weak-link nature of grain boundaries, indicating that the inter-grain critical current density Jcinter is comparable to intra-grain critical current density Jcintra in contrast to iron-arsenide superconductors. Jcinter is estimated as 1.9 × 104 A/cm2 at T = 0 K from magnetization measurement, which is similar to the values in iron-arsenide superconductors. Implication of these Jc behavior is discussed in relation to the possible pairing symmetry.",

keywords = "Critical current density, Iron oxypnictides, Magneto-optical imaging",

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

year = "2010",

month = dec,

doi = "10.1016/j.physc.2010.01.066",

language = "English",

volume = "470",

pages = "S300--S301",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier",

number = "SUPPL.1",

}

TY - JOUR

T1 - Magneto-optical imaging of polycrystalline LaFePO1-xF x

AU - Tsuchiya, Y.

AU - Nakajima, Y.

AU - Tamegai, T.

AU - Kamihara, Y.

AU - Hirao, M.

AU - Hosono, H.

PY - 2010/12

Y1 - 2010/12

N2 - The remanent state field profile has been observed in polycrystalline LaFePO0.94F0.06 by magneto-optical (MO) imaging method. MO images show the absence of magnetic field modulation associated with weak-link nature of grain boundaries, indicating that the inter-grain critical current density Jcinter is comparable to intra-grain critical current density Jcintra in contrast to iron-arsenide superconductors. Jcinter is estimated as 1.9 × 104 A/cm2 at T = 0 K from magnetization measurement, which is similar to the values in iron-arsenide superconductors. Implication of these Jc behavior is discussed in relation to the possible pairing symmetry.

AB - The remanent state field profile has been observed in polycrystalline LaFePO0.94F0.06 by magneto-optical (MO) imaging method. MO images show the absence of magnetic field modulation associated with weak-link nature of grain boundaries, indicating that the inter-grain critical current density Jcinter is comparable to intra-grain critical current density Jcintra in contrast to iron-arsenide superconductors. Jcinter is estimated as 1.9 × 104 A/cm2 at T = 0 K from magnetization measurement, which is similar to the values in iron-arsenide superconductors. Implication of these Jc behavior is discussed in relation to the possible pairing symmetry.

KW - Critical current density

KW - Iron oxypnictides

KW - Magneto-optical imaging

UR - http://www.scopus.com/inward/record.url?scp=78649691761&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78649691761&partnerID=8YFLogxK

U2 - 10.1016/j.physc.2010.01.066

DO - 10.1016/j.physc.2010.01.066

M3 - Article

AN - SCOPUS:78649691761

SN - 0921-4534

VL - 470

SP - S300-S301

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - SUPPL.1

ER -