Angular dependence of {ital c}-axis magnetoresistance in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} single crystals with columnar defects
- Los Alamos National Laboratory, MST-STC, MS-K763, Los Alamos, New Mexico 87545 (United States)
- Argonne National Laboratory, MSD, Argonne, Illinois 60439 (United States)
We measured the angular dependence of the {ital c}-axis magnetoresistance {rho}{sub c}({bold B}) of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} irradiated with heavy ions. At temperatures near 69 K the scaling of {rho}{sub c}({bold B}) with the {ital c}-axis magnetic field component B{sub {perpendicular}} is broken and the in-plane field, B{sub {parallel}}, affects {rho}{sub c}. At this temperature, at a specific field B{sub cr}{approx}B{sub {Phi}}/2, magnetoresistance becomes independent of field orientation. This crossing point allows us to estimate the correlation length {ital L} of pancake positions along the {ital c} axis. We find L/s{approximately}100 at B=B{sub cr}, where {ital s} is the interlayer spacing. This provides evidence of strong enhancement of pancake alignment in the vortex liquid in crystals with columnar defects. {copyright} {ital 1999} {ital The American Physical Society}
- OSTI ID:
- 351884
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 1 Vol. 60; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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