Epitaxial growth of Gd2Zr2O7/Y2O3 buffer layers for YBa2Cu3O7−δ coated conductors

Yu-qi, LU; Liu, Z.J.; Bai, Chuanyi; Feng, Feng; Zhao, Ruwei; Liu, Z.Y.; Hühne, Ruben; Holzäpfel, B.; Cai, Chuanbing

doi:10.1016/j.physc.2012.09.015

Cited by 11 publications

(1 citation statement)

References 17 publications

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“…It is known that the buffer layers such as CeO 2 , yttriumstabilized ZrO 2 (YSZ), Y 2 O 3 , SrTiO 3 (STO), and La 2 Zr 2 O 7 (LZO) play an important role in the architecture of the YBCO-coated conductor [2][3][4]. In order to obtain YBCOcoated conductor with high critical current (I c ), buffer layers should have certain properties, including a high chemical stability, a good capability of blocking interdiffusion, and the close lattice parameter to YBCO phase [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Sol–gel deposition of high-performance Re0.2Ce0.8O2/La2Zr2O7 composite buffer layers on Ni–W tapes for YBCO coated conductors

Bian

Chen

Tang

et al. 2015

J Sol-Gel Sci Technol

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Gd-, Y-, and La-doped CeO 2 films (Gd 0.2-Ce 0.8 O 2 , Y 0.2 Ce 0.8 O 2 , and La 0.2 Ce 0.8 O 2 ) are prepared on Ni-W tapes and La 2 Zr 2 O 7 -buffered Ni-W tapes using solgel method. The films are characterized by X-ray diffraction and atomic force microscopy. Results indicate that Y 0.2 Ce 0.8 O 2 (YCO) film shows the better crystallinity and the surface quality compared with Gd 0.2 Ce 0.8 O 2 (GCO) and La 0.2 Ce 0.8 O 2 (LCO) films. The YCO buffer layer has good in-plane texture with purely c-oriented grains. The YCO films deposited on La 2 Zr 2 O 7 (LZO) also demonstrate the good texture and the perfect surface quality. YBCO films are prepared on the YCO/LZO and LCO/LZO composite buffer layers through the low fluorine solution route. The YBCO film deposited on the YCO/LZO buffer layer displays a high T c of 89.6 K with a low transition temperature width (DT = 0.45 K), and a J c value of 0.5 MA/cm 2 , which is superior to that deposited on LCO/LZO buffer layer. Graphical Abstract Gd-, Y-, and La-doped CeO 2 films (Gd 0.2 Ce 0.8 O 2 , Y 0.2 Ce 0.8 O 2 , and La 0.2 Ce 0.8 O 2 ) are prepared on Ni-W tapes through sol-gel method. GCO film has a coarse surface, and the YCO film has the best texture and surface quality. Y 0.2 Ce 0.8 O 2 /La 2 Zr 2 O 7 and La 0.2 Ce 0.8 O 2 / La 2 Zr 2 O 7 composite buffer layers are also prepared and compared. The surface quality of Y 0.2 Ce 0.8 O 2 /La 2 Zr 2 O 7 is superior to that of La 0.2 Ce 0.8 O 2 /La 2 Zr 2 O 7 composite buffer layer. High-T c YBCO films with sharp DT = 0.45 K and a J c value of 0.5 MA/cm 2 are successfully obtained on the Y 0.2 Ce 0.8 O 2 /La 2 Zr 2 O 7 film, which is superior to that on La 0.2 Ce 0.8 O 2 /La 2 Zr 2 O 7 buffer layer.

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