UNSPECIFIED (1993) NEUTRON MEASUREMENTS OF THE VORTEX LATTICE IN YBA2CU3O7. In: 37TH ANNUAL CONF ON MAGNETISM AND MAGNETIC MATERIALS, DEC 01-04, 1992, HOUSTON, TX.

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Abstract

Neutron diffraction has been used to measure the vortex lattice scattering for YBa2Cu3O7. A square pattern is found when the field is applied along the c axis, while a triangular pattern is found when the field is applied well away from the c axis. High-resolution measurements for the square pattern show that the vortex lattice has long-range orientational order but only short-range positional order. The temperature dependence of the penetration depth is not that expected for a superconductor with a conventional s-wave BCS-type gap. Preliminary measurements for temperatures near the irreversibility line are consistent with the occurrence of melting of the vortex lattice or glass phase.

Item Type:	Conference Item (UNSPECIFIED)
Subjects:	Q Science > QC Physics
Journal or Publication Title:	JOURNAL OF APPLIED PHYSICS
Publisher:	AMER INST PHYSICS
ISSN:	0021-8979
Date:	15 May 1993
Volume:	73
Number:	10 Part 2A
Number of Pages:	5
Page Range:	pp. 5855-5859
Publication Status:	Published
Title of Event:	37TH ANNUAL CONF ON MAGNETISM AND MAGNETIC MATERIALS
Location of Event:	HOUSTON, TX
Date(s) of Event:	DEC 01-04, 1992
URI:	http://wrap.warwick.ac.uk/id/eprint/21313

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