Open AccessThe effects of Ti ion-irradiation on critical current and flux pinning in MgB2 thin film
Author(s) -
Yinbo Wang,
Changhu Xue,
Qian Feng
Publication year - 2012
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.61.197401
Subject(s) - materials science , irradiation , fluence , critical current , flux pinning , superconductivity , ion , critical field , thin film , chemical vapor deposition , magnetic field , condensed matter physics , transition temperature , flux (metallurgy) , analytical chemistry (journal) , optoelectronics , nanotechnology , nuclear physics , chemistry , metallurgy , physics , quantum mechanics , organic chemistry , chromatography
High-quality MgB2 films are fabricated via hybrid physical-chemical vapor deposition (HPCVD) and irradiated by Ti ions. Compared with the unirradiated film, the Ti-irradiated MgB2 film shows a high critical current density (Jc) in magnetic field and also a high upper critical field (Hc2), while the superconducting transition temperature (Tc) does not decrease significantly. The Ti-irradiated film with a best fluence at 1 1013/cm2 shows a high Jc of 1.72 105 A/cm2 in 4 T perpendicular field at a temperature of 5 K and a moderately decreased Tc at 39.9 K.