An effective substrate surface decoration to YBCO films by multiphase nanoparticles

作者：Xu Yan; Liu Min^*; Suo Hong Li; Ye Shuai; Wu Zi Ping; Mao Lei

来源：Physica C-Superconductivity and Its Applications, 2013, 495: 187-191.

DOI：10.1016/j.physc.2013.09.014

• YBCO film
• Bufferlay surface modification
• Interface nanodots
• Multiphase
• Pinning property

Three types of nanodots were deposited on the surface of single crystal LaAlO3(LAO) substrates before preparing YBCO films. By comparing with different interfacial nanodots, it was found that ZrO2 and Y0.15Zr0.85O2 (YSZ) interfacial nanodots have a similar size, shape, and density as well as distribution so that they have a same and weaker effect on the pinning ability of the YBCO film. However, CeO2/ZrO2 = 0.15/0.85 (CZO) has a different character with a small size, large density and uniform distribution. Especially, CZO interfacial nanodots are the most effective to enhance J(c) values of YBCO films in applied magnetic field. At 77 K and 3 T, the J(c) value of YBCO film with CZO interfacial nanodots decorating is 12 times of that of pure YBCO. A further research indicated that the high performance was due to multiphase. Besides, the advantages of multiphase nanoparticles are more prominent as increasing the applied magnetic field and temperature.

• 出版日期2013-12
• 单位北京工业大学