Study of anisotropic magnetoresistance in the thermodynamic fluctuation regime of single crystals of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+x}

Journal Article · Fri Nov 01 04:00:00 EST 1996 · Journal of Low Temperature Physics

DOI:https://doi.org/10.1007/BF00768504· OSTI ID:457258

Heine, G; Lang, W ^[1]; Wang, Xiao-Lin ^[2]

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1. Ludwig Boltzmann Institut fuer Festkoerperphysik, Wien (Austria)
2. Univ. of Wollongong (Australia); and others

Measurements of the in-plane and out-of-plane magnetoresistance in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+x} single crystals with a critical temperature T{sub c} = 93 K are reported for temperatures between T{sub c} and 200 K and in magnetic fields up to 13 T. Both the transverse and the longitudinal in-plane magnetoresistance are positive and originate entirely from the suppression of superconducting fluctuations by the magnetic field. The longitudinal out-of-plane magnetoresistance is negative at all temperatures and magnetic fields. As possible origins two recent models are discussed, the reduction of the quasiparticle density of states due to condensation into superconducting fluctuations and thermally activated transport over an interplane pseudogap.

• Sponsoring Organization: USDOE
• OSTI ID: 457258
• Report Number(s): CONF-960808--
• Journal Information: Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 3-4 Vol. 105; ISSN JLTPAC; ISSN 0022-2291
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
MAGNETORESISTANCE
MONOCRYSTALS
STRONTIUM OXIDES
TEMPERATURE RANGE 0065-0273 K