In-plane and out-of-plane magnetoresistance in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} with various carrier densities
The in-plane and out-of-plane magnetoresistance of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+x} single crystals was investigated in magnetic fields of 12 T, oriented parallel to the c axes. Crystals with different carrier concentrations, corresponding to the underdoped, optimally doped, and overdoped region of the phase diagram of high-temperature superconductors, were prepared by variation of the oxygen content. Above the critical temperature, the magnetoresistance is positive for in-plane and negative for out-of-plane currents in all samples. With recent theories for superconducting order-parameter fluctuations, the in-plane magnetoresistance can be described well for all samples. Only the out-of-plane magnetoresistance of the underdoped crystal shows distinct deviations from the theoretical predictions and appears to be influenced by the pseudo-gap.
- Research Organization:
- Inst. fuer Materialphysik, Wien (AT)
- OSTI ID:
- 20015303
- Journal Information:
- Journal of Low Temperature Physics, Vol. 117, Issue 5-6; Conference: International Conference on Physics and Chemistry of Molecular and Oxide Superconductors, Stockholm (SE), 07/28/1999--08/02/1999; Other Information: PBD: Dec 1999; ISSN 0022-2291
- Country of Publication:
- United States
- Language:
- English
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