Stress analysis in melt processed RBa2Cu3O7 (R = Y, Nd) by micro-raman spectroscopy

R. Provoost, K. Rosseel, D. Dierickx, R. E. Silverans, V. V. Moshchalkov, H. Kojo, Masato Murakami

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We have performed a detailed analysis of the micro-Raman spectra recorded around the non-superconducting R2BaCuO5 inclusions embedded in different melt grown RBa2Cu3O7 (R = Y, Nd) samples. The Raman spectra were recorded every 0.4 or 0.5 μm along a line crossing one or more inclusions on two specific samples. Sample A, YBa2Cu3O7 with 33 vol% of Y2BaCuO5 was prepared following a fast-melt-processing scheme. The cooling rate of the melt, crossing the peritectic temperature, was 180°C/h. We observed a downshift of the phonon modes of the superconducting phase around the inclusions. This softening can be related to the presence of tensile stresses around the inclusions. Sample B, NdBa2Cu3O7 with 40% of Nd4Ba2Cu2O10 was prepared following an oxygen-controlled-melt-growth method. A cooling rate of 1°C/h was applied to produce this sample. In this case we found a hardening of the phonon modes of the superconducting phase around the inclusions towards the energy of the phonon modes obtained in single crystals. Again, this shift of the Raman peak position can be related to the variation of mechanical stress around the inclusions. The hardening can be caused by the relaxation of tensile stress in the superconducting matrix around the inclusions.

Original languageEnglish
Pages (from-to)185-192
Number of pages8
JournalApplied Superconductivity
Volume6
Issue number2-5
Publication statusPublished - 1998 Feb
Externally publishedYes

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stress analysis
Stress analysis
Raman spectroscopy
inclusions
tensile stress
Tensile stress
hardening
Hardening
Raman scattering
Raman spectra
Cooling
cooling
softening
Single crystals
Oxygen
shift
single crystals
oxygen
matrices
Processing

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Provoost, R., Rosseel, K., Dierickx, D., Silverans, R. E., Moshchalkov, V. V., Kojo, H., & Murakami, M. (1998). Stress analysis in melt processed RBa2Cu3O7 (R = Y, Nd) by micro-raman spectroscopy. Applied Superconductivity, 6(2-5), 185-192.

Stress analysis in melt processed RBa2Cu3O7 (R = Y, Nd) by micro-raman spectroscopy. / Provoost, R.; Rosseel, K.; Dierickx, D.; Silverans, R. E.; Moshchalkov, V. V.; Kojo, H.; Murakami, Masato.

In: Applied Superconductivity, Vol. 6, No. 2-5, 02.1998, p. 185-192.

Research output: Contribution to journalArticle

Provoost, R, Rosseel, K, Dierickx, D, Silverans, RE, Moshchalkov, VV, Kojo, H & Murakami, M 1998, 'Stress analysis in melt processed RBa2Cu3O7 (R = Y, Nd) by micro-raman spectroscopy', Applied Superconductivity, vol. 6, no. 2-5, pp. 185-192.
Provoost R, Rosseel K, Dierickx D, Silverans RE, Moshchalkov VV, Kojo H et al. Stress analysis in melt processed RBa2Cu3O7 (R = Y, Nd) by micro-raman spectroscopy. Applied Superconductivity. 1998 Feb;6(2-5):185-192.
Provoost, R. ; Rosseel, K. ; Dierickx, D. ; Silverans, R. E. ; Moshchalkov, V. V. ; Kojo, H. ; Murakami, Masato. / Stress analysis in melt processed RBa2Cu3O7 (R = Y, Nd) by micro-raman spectroscopy. In: Applied Superconductivity. 1998 ; Vol. 6, No. 2-5. pp. 185-192.
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