Characterization of phase evolution in YBCO coated conductors produced by the ex situ BaF2 process

被引：9

作者：

Feenstra, R. ^{[1
]}

List, F. A.

Zhang, Y.

Christen, D. K.

Maroni, V. A.

Miller, D. J.

Feldmann, D. M.

机构：

[1] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[2] Argonne Natl Lab, Argonne, IL 60439 USA

[3] Univ Wisconsin, Dept Appl Phys, Madison, WI 53706 USA

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2007年 / 17卷 / 02期

关键词：

high-temperature superconductors; Raman spectroscopy; superconducting epitaxial layers; thick films;

D O I：

10.1109/TASC.2007.899994

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Raman microprobe spectroscopy and scanning electron microscopy were used to study the initial nucleation and growth of YBCO in thick precursors by the BaF2 ex situ process. For quenched films of 2 mu m thickness, the data indicate a low density of c-axis nuclei near the substrate, apparently due to a reduced oxygen concentration deep inside the precursor layer. Significant non c-axis growth was also observed; the majority of this material nucleates away from the substrate. Measurement of the conversion rate by in situ XRD for films in the range 0.2-2 mu m suggest a weak thickness dependence.

引用

收藏

页码：3254 / 3258

页数：5

相关论文

共 11 条

[1] Review of a chemical approach to YBa2Cu3O7-x-coated, superconductors -: metalorganic deposition using trifluoroacetates [J].

Araki, T ;

Hirabayashi, I .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2003, 16 (11) :R71-R94

[2] Critical currents Ic(77 k) > 350 A/cm-width achieved in ex situ YBCO coated conductors using a faster conversion process [J].

Feenstra, R ;

Gapud, AA ;

List, FA ;

Specht, ED ;

Christen, DK ;

Holesinger, TG ;

Feldmann, DA .

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 2005, 15 (02) :2803-2807

[3] Through-thickness superconducting and normal-state transport properties revealed by thinning of thick film ex situ YBa2Cu3O7-x coated conductors [J].

Feldmann, DM ;

Larbalestier, DC ;

Feenstra, R ;

Gapud, AA ;

Budai, JD ;

Holesinger, TG ;

Arendt, PN .

APPLIED PHYSICS LETTERS, 2003, 83 (19) :3951-3953

[4] Critical currents of ex situ YBa2Cu3O7-δ thin films on rolling assisted biaxially textured substrates:: Thickness, field, and temperature dependencies [J].

Ijaduola, AO ;

Thompson, JR ;

Feenstra, R ;

Christen, DK ;

Gapud, AA ;

Song, X .

PHYSICAL REVIEW B, 2006, 73 (13)

[5] Crystalline phase development during vacuum conversion of thin barium fluoride precursor films on metallic substrates [J].

List, FA ;

Specht, ED ;

Heatherly, L ;

Leonard, KJ ;

Sathyamurthy, S ;

Kroeger, DM .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2003, 391 (04) :350-362

[6] Metalorganic deposition of YBCO films for second-generation high-temperature superconductor wires [J].

Rupich, MW ;

Verebelyi, DT ;

Zhang, W ;

Kodenkandath, T ;

Li, XP .

MRS BULLETIN, 2004, 29 (08) :572-578

[7] Three- and four-μm-thick YBa2Cu3O7 layers with high critical-current densities on flexible metallic substrates by the BaF2 process -: art. no. 013902 [J].

Solovyov, VF ;

Wiesmann, HJ ;

Li, Q ;

Welch, DO ;

Suenaga, M .

JOURNAL OF APPLIED PHYSICS, 2006, 99 (01) :1-6

[8] Nucleation of YBa2Cu3O7-x on buffered metallic substrates in thick precursor films made by the BaF2 process [J].

Solovyov, VF ;

Wiesmann, HJ ;

Suenaga, M .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2005, 18 (03) :239-248

[9] Characterization of MBa2Cu3O7-x thin films by Raman microspectroscopy [J].

Venkataraman, K ;

Baurceanu, R ;

Maroni, VA .

APPLIED SPECTROSCOPY, 2005, 59 (05) :639-649

[10] Reel-to-reel x-ray diffraction and Raman microscopy analysis of differentially heat-treated Y-BaF2-Cu precursor films on metre-length RABiTS [J].

Venkataraman, K ;

Lee, DF ;

Leonard, K ;

Heatherly, L ;

Cook, S ;

Paranthaman, M ;

Mika, M ;

Maroni, VA .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2004, 17 (06) :739-749