Does vortex lattice of YBa{sub 2}Cu{sub 3}O{sub 6.94} in H{perpendicular}c melt below intrinsic-pinning irreversibility line?
Vortex lattice melting in the H{perpendicular}c configuration of an YBa{sub 2}Cu{sub 3}O{sub 6.94} single crystal has been investigated by means of the ac susceptibility {chi}{prime}-i{chi}{double{underscore}prime} and the magnetic torque {tau}. The melting transition of vortex lattice occurs in H{perpendicular}c, too. Since the torque curve shows a sharp peak in the irreversible torque at {theta}{sub c} {approx{underscore}equal} 90{degree} due to intrinsic pinning at lower temperatures, the authors can determine the irreversibility line for the intrinsic pinning. The melting transition in the H{perpendicular}c configuration appears at temperatures where the intrinsic-pinning peak is absent. They consider that the intrinsic pinning does not affect the nature of the vortex melting transition in the H{perpendicular}c configuration.
- Research Organization:
- Osaka Prefecture Univ., Sakai (JP)
- OSTI ID:
- 20015324
- 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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