Evidence for Matthiessen's rule in the normal state resistivity of zinc doped yttrium barium copper oxide

We have measured the electrical resistivity rho (T) for a number of sintered samples of Y sub(1)Ba sub(2)(Cu sub(1-x)Zn sub(x)) sub(3)O sub(7) with x in the range 0.01-0.10. Above T sub(c), d rho /dT falls smoothly with increasing bulk density and is independent of x as confirmed by measurements on...

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Bibliographic Details
Published in:Superconductor science & technology 1991-01, Vol.4 (1S), p.S277-S279
Main Authors: Cooper, J R, Obertelli, S D, Freeman, P A, Zheng, D N, Loram, J W, Liang, W Y
Format: Article
Language:English
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Summary:We have measured the electrical resistivity rho (T) for a number of sintered samples of Y sub(1)Ba sub(2)(Cu sub(1-x)Zn sub(x)) sub(3)O sub(7) with x in the range 0.01-0.10. Above T sub(c), d rho /dT falls smoothly with increasing bulk density and is independent of x as confirmed by measurements on alloys of equal density. Taking d rho /dT to be independent of x, we find that the extrapolated residual resistivity ( rho sub(res)) at T = 0 increases linearly with x in the range 0 less than or equal to x less than or equal to 0.07. These facts suggest that the linear term in rho arises from an intrinsic scattering mechanism which is independent of x, and that the substituting zinc atoms act as independent scattering centres, in accordance with Matthiessen's rule for normal metals.
ISSN:0953-2048
1361-6668
DOI:10.1088/0953-2048/4/1S/078