Magnetic properties of single-crystal Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub 8+[ital y]]: Experimental evidence for a dimensional crossover

Journal Article · Sun May 01 00:00:00 EDT 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.49.12984· OSTI ID:6735888

Pradhan, A K; Roy, S B; Chaddah, P ^[1]; Chen, C; Wanklyn, B M ^[2]

---

1. Low Temperature Physics Group, Centre for Advanced Technology, Indore 452 013 (India)
2. Clarendon Laboratory, Department of Physics, Oxford University, Parks Road, Oxford, OX1 3PU (United Kingdom)

Magnetization curves of high-quality superconducting Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub 8+[ital y]] single crystals in fields oriented parallel to the [ital c] axis have been reported at various temperatures. The irreversibility line and magnetic relaxation of this single crystal have been measured in magnetic fields parallel to the [ital c] axis of the crystal. We have observed a low-field anomaly in the magnetization together with a sharp rise of the irreversibility line and a nonlogarithmic magnetic relaxation at 25 K. We argue that 25 K is a boundary temperature where the system undergoes a dimensional crossover from the three-dimensional (3D) to the 2D regime. The relaxation rate also predicts that although the flux creep above this crossover temperature follows the conventional Kim-Anderson thermally activated flux-creep model, below this crossover temperature it follows that predicted by the collective flux pinning or vortex-glass models.

• OSTI ID: 6735888
• Journal Information: Physical Review, B: Condensed Matter; (United States), Vol. 49:18; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH OXIDES
MAGNETIC PROPERTIES
CALCIUM OXIDES
CUPRATES
STRONTIUM OXIDES
ACTIVATION ENERGY
CRITICAL CURRENT
MAGNETIZATION
MONOCRYSTALS
RELAXATION
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TRANSITION TEMPERATURE
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTALS
CURRENTS
ELECTRIC CURRENTS
ENERGY
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
STRONTIUM COMPOUNDS
TEMPERATURE RANGE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
360207* - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)