Abstract
We demonstrate that the maximum of the bulk pinning force(Fp,max) of YBCO filmswith BaSnO3 nanoparticles(YBCO+BSO) can be more thantwice the value of Fp,max of regular YBCO films of similar thickness at 77 or 65 K. Also, inYBCO+BSO films, theposition of the Fp,max is shifted to higher fields occurring at more than 4 T at 77 K, as opposed to typical 1.5–2 T ingood-quality YBCO films. Further, we show that a unique, distinguishable dual-peak structure inFp versusH plotsin YBCO+BSO samples can exist, possibly due to the presence of simultaneously operative dual pinningmechanisms.
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