Mixed Rare Earth (Nd1/3Eu1/3Gd1/3)Ba2Cu3O7-d Thin Films by PLD for Coated Conductor

作者：Ko Rock Kil^*; Bae Sung Hwan; Jung Myung Jin; Jang Se Hoon; Song Kyu Jeong; Park Chan; Sohn Myung Hwan; Kang Suk ill; Oh Sang Soo; Ha Dong woo; Ha Hong Soo; Kim Ho Sup; Kim Young Cheol

来源：IEEE Transactions on Applied Superconductivity, 2009, 19(3): 3136-3139.

DOI：10.1109/TASC.2009.2018419

• Coated conductor
• Gd123
• mixed rare earth
• NEG123
• pulsed laser deposition
• REBCO

In order to investigate the possibility of using mixed rare earth (Nd1/3Eu1/3Gd1/3)Ba2Cu3O7-x (NEG123) as the superconducting layer of the HTS coated conductor, the NEG123 thin film was deposited epitaxially on LAO(100) single crystal and IBAD_YSZ metal templates by pulsed laser deposition. Systematic studies were carried out to investigate the influences of deposition parameters of PLD on the microstructure, texture and superconducting properties of NEG-123 coated conductor. Deposition at oxygen partial pressure of 600 mTorr was needed to routinely obtain high quality NEG123 films with J(C)'s (77 K) over 2 MA/cm(2) and Tc's over 90 K (Delta T similar to 2 K). We verified from magnetization study that the NEG123 has an improved in-field Jc as the field increases at temperatures between 10 K and 77 K compared with Gd123. The J(C) (77 K, self field) and the value of onset T-C of NEG123 thin film on LAO substrate was 4.0 MA/cm(2) and 92 K, respectively. This is the first report, to the best of our knowledge, of coated conductors with NEG123 film as the superconducting layer which have Ic and Jc over 40 A/cm-width and 1.6 MA/cm(2) at 77 K, self field. This study shows the possibility of using NEG123 film as the superconducting layer of the HTS coated conductor which can be used in high magnetic field power electric devices.

• 出版日期2009-6