Angular dependence of c-axis magnetoresistance in Bi2Sr2CaCu2O8+delta single crystals with columnar defects

Article

关键词: JOSEPHSON PLASMA RESONANCE;    DECOUPLED VORTEX LIQUID;    REVERSIBLE MAGNETIZATION;    PHASE COHERENCE;    SUPERCONDUCTORS;    TRANSITION;    DISSIPATION;   

DOI  :  10.1103/PhysRevB.60.96

来源: SCIE

【 摘 要 】

We measured the angular dependence of the c-axis magnetoresistance rho(c)(B) of Bi2Sr2CaCuO8+delta irradiated with heavy ions. At temperatures near 69 K the scaling of rho(c)(B) with the c-axis magnetic field component B, is broken and the in-plane field, B-parallel to, affects rho(c). At this temperature, at a specific field B(cr)approximate to B-Phi/2, magnetoresistance becomes independent of field orientation. This crossing point allows us to estimate the correlation length L of pancake positions along the c axis. We find L/s similar to 100 at B = B-cr, where s is the interlayer spacing. This provides evidence of strong enhancement of pancake alignment in the vortex liquid in crystals with columnar defects. [S00163-1829(99)14925-7].

【 授权许可】

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