ISSN:
1572-9605
Keywords:
Superconductivity
;
YBa2(Cu1−x Co x )3O7−δ
;
Hall effect
;
Single crystals
Source:
Springer Online Journal Archives 1860-2000
Topics:
Electrical Engineering, Measurement and Control Technology
,
Physics
Notes:
Abstract We have measured the in-plane Hall effect and in-plane resistivity of cobalt-doped YBa2Cu3O7−δ (YBCO) single-crystal samples. The concentration of cobalt ranged from 1 to 3%. As the applied field was varied, a sign reversal of the Hall resistivity was seen for 1 and 2% Co-doped samples, but not for the 3% sample. Our results are expressed in terms of conductivities, as recently recommended by the work of Dorseyet al. and Kopninet al. In the mixed state just below the superconducting transition temperatureT c, the Hall conductivityσ xy is the sum of two terms,C 1/H andC 2H, whereC 1 andC 2 are field-independent but temperature-dependent. As previously observed by Ginsberg and Manson for undoped YBCO, the coefficientC 1 is approximately proportional toτ 2 andC 2 is approximately linear inτ, whereτ = 1−(T/T c ). The values ofC 1 andC 2 are presented for each cobalt concentration.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00728176
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