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Hall effect and sign reversal in Gd(Ba2-xNdx)Cu3O7+δ

Fallahi, S ; Sharif University of Technology | 2008

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jmmm.2008.02.130
  3. Publisher: 2008
  4. Abstract:
  5. We have investigated the Hall measurement of Gd(Ba2-xNdx)Cu3O7+δ with x=0, 0.05, 0.1, 0.15, and 0.2 in a magnetic field of 0-1 T. The nominal samples has been prepared by the conventional solid-state reaction technique. The iodometric titration experiment was carried out for samples. The Rietveld analysis of the X-ray diffraction patterns indicates that samples are mainly single phase. The normal state Hall coefficient behaves as 1/T in all samples. All samples with nominal compositions show single sign reversal with variation of magnetic field and temperature. The Hall resistivity of the samples with x=0 and 0.1 close to the superconducting transition temperature changes its sign with decreasing temperature and tends to a minimum -Δmax, and then monotonically goes to zero. The absolute value of -Δmax decreases with the increase of magnetic field. This can be qualitatively explained by a model calculation based on the time-dependent Ginsburg-Landau theory. © 2008 Elsevier B.V. All rights reserved
  6. Keywords:
  7. Copper compounds ; Hall effect ; Magnetic fields ; Solid state reactions ; Superconducting transition temperature ; X ray diffraction ; Ginsburg-Landau theory ; Hall measurement ; Iodometric titration ; Gadolinium compounds
  8. Source: Journal of Magnetism and Magnetic Materials ; Volume 320, Issue 13 , 2008 , Pages 1884-1888 ; 03048853 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0304885308002722