摘要
为了降低第二代高温超导涂层导体的制备成本,采用电化学法(ED),在双轴织构的Ni-5at%W(Ni-5W)金属基带上分别成功制备出了具有较好c轴取向的La2Zr2O7(LZO)和Gd2Zr2O7(GZO)缓冲层.通过与磁控溅射方法(MS)相结合,制备出MS-CeO2/ED-RE2Zr2O7双层结构,用以取代完全用磁控溅射方法(MS)制备的多层缓冲层结构.电化学法得到的60 nm LZO缓冲层的面内和面外织构半高宽分别为7.2°和6.8°,同样厚度的GZO缓冲层的面内和面外半高宽分别为6.7°和5.8°.之后用脉冲激光沉积(PLD)在ED-LZO/Ni-5W,ED-GZO/Ni-5W,MS-CeO2/ED-LZO/Ni-5W三种结构的缓冲层上分别制备出具有超导性能的YBa2Cu3O7-δ(YBCO)超导层.
Electrodeposition (ED), a novel and low cost method for epitaxial growth of La2Zr2O7 (LZO) and Gd2Zr2O7 (GZO) buffer layers on the biaxially textured Ni-5at%W (Ni-5W) substrate, was successfully developed to reduce the production cost of the second generation high temperature coated conductors. Combined with magnetron sputtering (MS) method, the architecture of MS-CeO2/ED-RE2Zr2O7 was obtained to replace the multi- layers deposited only by MS system. Using electrodeposition, the full-width at half maximum (FWHM) values of phi (Ф) scans (in-plane texture) and omega (w) scans (out-of plane texture) are 7.2° and 6.8°, respectively, for a typical LZO layer with 60 nm thickness. The corresponding values are 6.7° and 5.8° for 60 nm-thick GZO layers fabricated by the same method. YBa2Cu3OT-δ (YBCO) films with superconducting transitions are subsequently ob- tained on ED-LZO/Ni-5W, ED-GZO/Ni-5W and MS-CeO2/ED-LZO/Ni-5W structures by using pulsed-laser depo- sition (PLD) system.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2012年第11期1191-1196,共6页
Journal of Inorganic Materials
基金
科技部项目(2011CBA00105
2009AA03Z204)
上海市科委项目(11dz1100300
10dz1203500)~~
关键词
YBCO
缓冲层
电化学
双轴织构
YBCO
buffer layer
electrodeposition
biaxial texture