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Melting behavior and superheating capacity of REBa 2 Cu 3 O y films with nano‐layer buffered structures
Author(s) -
Wang Wei,
Xiang Hui,
Hussain Ghulam,
Yu Dejing,
Zhu Yisha,
Zhang Letian,
Samoilenkov Sergey V.,
Kaul Andrey R.,
Yao Xin
Publication year - 2018
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.15290
Subject(s) - superheating , crystallinity , materials science , buffer (optical fiber) , layer (electronics) , nano , chemical engineering , analytical chemistry (journal) , nanotechnology , composite material , chemistry , organic chemistry , condensed matter physics , telecommunications , physics , computer science , engineering
Using high temperature‐optical microscopy, in situ investigations were conducted on melting and superheating behaviors of REBa 2 Cu 3 O 7−δ (RE123, RE = Nd, Gd) films, which were grown on nano‐layer buffered substrates. The results demonstrate that all buffered RE123 films have improved crystallinity and in‐plane alignments, leading to the higher superheating capability. In the first case, due to its good lattice match with the buffer material of Y123, the Nd123 film with the minimal extrinsic property grew from the superior interface. In the second circumstance, because of its stronger chemical bonding with the buffer layer of Gd 2 O 3 , the pure c ‐axis oriented Gd123 film was fabricated. Moreover, the optimized thickness of buffer layer plays an important role in reducing interface energy of RE123 films and enhancing its superheating capacity.