The effects of Ti ion-irradiation on critical current and flux pinning in MgB2 thin film

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 (J(c)) in magnetic field and also a high upper critical field (H-c2), while the superconducting transition temperature (T-c) does not decrease significantly. The Ti-irradiated film with a best fluence at 1 x 10(13)/cm(2) shows a high J(c) of 1.72 x 10(5) A/cm(2) in 4 T perpendicular field at a temperature of 5 K and a moderately decreased T-c at 39.9 K.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000311841100063&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Physics, MultidisciplinarySCI(E)中文核心期刊要目总览(PKU)中国科技核心期刊(ISTIC)中国科学引文数据库(CSCD)219null6