A comparative study has been performed on Pr-doped Y1-x PrxBCO (x=0-0.20) thin films deposited by pulsed laser deposition on MgO and buffered NiW substrates to study the effect of Pr-doping on the grain boundary critical current density (Jcgb). Our earlier work on bulk materials and SrTiO3 substrates indicated that, whereas Pr increases Jc in bulk samples, it does not increase Jc in film samples without grain boundaries. In this work, we present increased Jc in low concentrations of Pr3+-doping (x< 0.04) at temperatures above 60 K in film samples on MgO substrates and at all temperatures and fields in film samples on buffered NiW substrates. Results indicate that Pr segregates into grain boundary regions, improving the local hole concentration and carrier density, hence, increasing Jcgb.
Published in:
Journal of Applied Physics
(Volume:110
,
Issue:
11
)
Date of Publication:
Dec 2011
- Page(s):
-
113905
-
113905-8
- ISSN :
-
0021-8979
- Digital Object Identifier :
-
10.1063/1.3664773
- Product Type:
-
Journals & Magazines
- Date of Current Version :
-
12 December 2011
- Issue Date :
-
Dec 2011