Sm/Ba Composition Ratio on the Filed Dependence of Jc in Sm1+xBa2-xCu3Oy Thin Films
We have reported the superconducting properties of Sm1+xBa2-xCu3Oy (SmBCO; x=0.08) thin films prepared by the low-temperature growth (LTG) technique. To investigate the effect of the Sm/Ba composition ratio (x) in the SmBCO, we deposited an upper layer with the Sm/Ba composition of x=0.00-0.12. From...
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Published in | TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan) Vol. 40; no. 12; pp. 558 - 562 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | Japanese English |
Published |
Tokyo
CRYOGENICS AND SUPERCONDUCTIVITY SOCIETY OF JAPAN
2005
Japan Science and Technology Agency |
Subjects | |
Online Access | Get full text |
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Summary: | We have reported the superconducting properties of Sm1+xBa2-xCu3Oy (SmBCO; x=0.08) thin films prepared by the low-temperature growth (LTG) technique. To investigate the effect of the Sm/Ba composition ratio (x) in the SmBCO, we deposited an upper layer with the Sm/Ba composition of x=0.00-0.12. From the result of the etch pit and composition analysis, we found that the Sm/Ba composition ratio in the SmBCO film influenced possible pinning centers, such as linear defects including screw dislocation and edge dislocation, and nano-size low-critical temperature (Tc) phase acting as a field-induced pinning center. Moreover, we noticed the Sm/Ba composition ratio in the SmBCO film influenced Tc and critical current density (Jc). As a result, the SmBCO films with x=0.04 and 0.08 showed Jc=2.8 × 105 A/cm 2 and 1.7 × 105 A/cm2 (77 K, B//c, 8 T), respectively. |
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ISSN: | 0389-2441 1880-0408 |
DOI: | 10.2221/jcsj.40.558 |