Enhanced flux pinning and critical current density via incorporation of self-assembled rare-earth barium tantalate nanocolumns within YBa2Cu3O7-δ films

被引：54

作者：

Wee, Sung Hun ^{[1
,2
]}

Goyal, Amit ^{[1
]}

Specht, Eliot D. ^{[1
]}

Cantoni, Claudia ^{[1
]}

Zuev, Yuri L. ^{[1
,3
]}

Selvamanickam, V. ^{[4
]}

Cook, Sy ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

[2] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

[3] Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA

[4] Univ Houston, Dept Mech Engn, Houston, TX 77204 USA

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 14期

关键词：

NANODOTS;

D O I：

10.1103/PhysRevB.81.140503

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report rare-earth barium tantalates, Ba2RETaO6 (BRETO, RE=rare earth elements) as promising pinning additives for superior flux pinning in YBa2Cu3O7-delta (YBCO) films. BRETO compounds have excellent chemical inertness to and large lattice mismatch with YBCO. This results in phase separation and strain minimization driven self-assembly of BRETO nanocolumns within YBCO films. YBCO+4 vol % Ba2GdTaO6 films show similar T-c to that of an undoped film of similar to 88.3 K, a higher self- field J(c) of 3.8 MA/cm(2) at 77 K, and improved in-field J(c) higher by a factor of 1.5-6 over entire magnetic field and angular ranges.

引用

页数：4

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