Effect of Ni doping on the thermal expansion of the high-Tc superconductor YBa2Cu3Oy

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Abstract

Thermal expansion measurements have been carried out for the Ni-substituted compounds YBa2(Cu1-xNix)3Oy, (0 ≤ x ≤ 5%) with a high-resolution dilatometer using the three-terminal capacitance technique. The present set-up is sensitive enough to detect changes in α of less than 10-8 K-1. Results indicate that the jump Δα in the coefficient of linear thermal expansion decreases with increase in Ni content. For x = 1.5%, Δα decreases by a factor of 3 whereas Tc does not change appreciably. There is evidence that the temperature dependence of a for compounds with high Ni concentration depends on the conditions of sample growth.

Original languageEnglish
Pages (from-to)527-533
Number of pages7
JournalJournal of Physics Condensed Matter
Volume8
Issue number5
DOIs
Publication statusPublished - 29-01-1996

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Superconducting materials
Thermal expansion
thermal expansion
Doping (additives)
extensometers
Dilatometers
Capacitance
capacitance
temperature dependence
high resolution
coefficients
Temperature

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

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title = "Effect of Ni doping on the thermal expansion of the high-Tc superconductor YBa2Cu3Oy",
abstract = "Thermal expansion measurements have been carried out for the Ni-substituted compounds YBa2(Cu1-xNix)3Oy, (0 ≤ x ≤ 5{\%}) with a high-resolution dilatometer using the three-terminal capacitance technique. The present set-up is sensitive enough to detect changes in α of less than 10-8 K-1. Results indicate that the jump Δα in the coefficient of linear thermal expansion decreases with increase in Ni content. For x = 1.5{\%}, Δα decreases by a factor of 3 whereas Tc does not change appreciably. There is evidence that the temperature dependence of a for compounds with high Ni concentration depends on the conditions of sample growth.",
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Effect of Ni doping on the thermal expansion of the high-Tc superconductor YBa2Cu3Oy. / Rao, Ashok.

In: Journal of Physics Condensed Matter, Vol. 8, No. 5, 29.01.1996, p. 527-533.

Research output: Contribution to journalArticle

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AB - Thermal expansion measurements have been carried out for the Ni-substituted compounds YBa2(Cu1-xNix)3Oy, (0 ≤ x ≤ 5%) with a high-resolution dilatometer using the three-terminal capacitance technique. The present set-up is sensitive enough to detect changes in α of less than 10-8 K-1. Results indicate that the jump Δα in the coefficient of linear thermal expansion decreases with increase in Ni content. For x = 1.5%, Δα decreases by a factor of 3 whereas Tc does not change appreciably. There is evidence that the temperature dependence of a for compounds with high Ni concentration depends on the conditions of sample growth.

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