LPE growth of PZNT film using superheating YBCO thin film as seed layer |
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| Authors: | F Qin YQ Cai X Yao XH Zeng QL Rao G Li Y Jiang YR Li BW Tao |
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| Institution: | (1) Department of Physics, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P.R. China;(2) State Key Laboratory for Metal Matrix Composites , Shanghai Jiao Tong University, 1954 Huashan Road, Shanghai, 200030, P.R. China;(3) Institute of Microelectronics and Solid State Electronics, University of Electronic Science and Technology of China, Chengdu, 610054, P.R. China |
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| Abstract: | A superheating YBa2Cu3O7-δ (YBCO or Y123) thin film was applied as a seed layer to grow Pb(Zn1/3Nb2/3)0.91Ti0.09]O3 (PZNT) films by a liquid phase epitaxy (LPE) process. In the present work, the YBCO thin film underwent a growth temperature of 1050 °C, which was about 40 °C higher than its peritectic temperature. It is very interesting that the superheated YBCO seed film could be used to grow not only Nd1+xBa2-xCu3O7-δ (NBCO) films with similar compositions but also PZNT films with completely different compositions. The XRD analysis confirmed that the PZNT film grown on the YBCO seeded MgO substrate had a good epitaxial relationship of 100](001)PZNT//100](001)YBCO//100] (001)MgO. Compared with the PZNT films directly grown on MgO substrates, the LPE PZNT film on YBCO/MgO presented a better surface morphology. It was found that the superheating YBCO seed film plays a crucial role for the LPE growth of PZNT in the process. Furthermore, the superheating mechanism was discussed in terms of thermodynamic theories as well. PACS 77.84.-s; 61.10.Nz; 68.37.Hk; 81.15.Lm; 82.45.Mp |
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