TY - JOUR
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
UR - http://www.scopus.com/inward/record.url?scp=77957927422&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77957927422&partnerID=8YFLogxK
U2 - 10.1016/j.physc.2010.05.018
DO - 10.1016/j.physc.2010.05.018
M3 - Article
AN - SCOPUS:77957927422
SN - 0921-4534
VL - 470
SP - 993
EP - 995
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
IS - 20
ER -