Skip to main content

Texture effect on vortex‐state TF‐μ+SR in Bi‐2223 high‐TC materials


The influence of texture in Bi‐2223 ingots on the temperature dependence of the μ+ spin relaxation rate has been investigated. Texture was induced during cold‐isostatic‐pressing by applying an additional uniaxial load which tends to align single grain c axes along the stress direction, \widehatz. Small plates were cut with faces either \Vert or \perp \widehatz and μSRwas measured in a 15 mT transverse field (TF) during cooling from room temperature to 6 K. While for highly‐textured material, low‐temperature limits are substantially smaller than expected, the large shift (55%) observed when switching from \widehatz\perp TF to \widehatz\,\Vert TF clearly indicates that anisotropy has developed. Relaxation rates for the weakly‐textured sample lie in between. To a lesser extent, sintering also enhanced the low‐temperature relaxation, but did not affect TC significantly. All samples showed a weak onset of depolarization between 60 K and 90 K, most likely due to the presence of a Bi‐2212 impurity phase. This impurity phase might cause the transition‐temperature smearing in the 100–110 K range in the weakly textured (and less compacted) material. Thus the sharpness of the relaxation drop might be relevant for assessment of material quality and be used as a criterion in the improvement of the production process.

This is a preview of subscription content, access via your institution.


  1. S. Tanaka, in: Phenomenology and Applications of High-Temperature Superconductors, eds. K.S. Bedell et al. (Addison-Wesley, NY, 1992).

    Google Scholar 

  2. C.E. Stronach, Supercond. Ind. 8(2) (1995) 6.

    Google Scholar 

  3. P. Langlois, H. Massat and R. Suryanarayanan}, J. Phys. III (Paris) 4 (1994) 2137.

    Article  Google Scholar 

  4. Y.J. Uemura et al., Phys. Rev. Lett. 66 (1991) 2665.

    Article  ADS  Google Scholar 

  5. T. Schneider and H. Keller, Phys. Rev. Lett. 69 (1992) 3374.

    Article  ADS  Google Scholar 

  6. C. Niedermayer et al., Phys. Rev. Lett. 71 (1993) 1764.

    Article  ADS  Google Scholar 

  7. C. Bernhard et al., Phys. Rev. B 52 (1995) 10488.

    Article  ADS  Google Scholar 

  8. T.M. Riseman et al., Phys. Rev. B 52 (1995) 10569.

    Article  ADS  Google Scholar 

  9. S. Nhien and P.L. Langlois, submitted to Physica C.

  10. W. Barford and J.M.F. Gunn, Physica C 156 (1988) 515.

    Article  ADS  Google Scholar 

  11. D.R. Harshman et al., Phys. Rev. B 39 (1989) 851; E.M. Forgan et al., Hyp. Int. 63 (1990) 71.

    Article  ADS  Google Scholar 

Download references

Author information

Authors and Affiliations


Rights and permissions

Reprints and Permissions

About this article

Cite this article

Grynszpan, R., Langlois, P., Noakes, D. et al. Texture effect on vortex‐state TF‐μ+SR in Bi‐2223 high‐TC materials. Hyperfine Interactions 105, 95–100 (1997).

Download citation

  • Issue Date:

  • DOI:


  • Relaxation Rate
  • Impurity Phase
  • Spin Relaxation
  • Transverse Field
  • Texture Effect