Evidence for vortex lattice melting and softening in untwinned YBa{sub 2}Cu{sub 3}O{sub 7} single crystal

Journal Article · Sat Nov 30 23:00:00 EST 1996 · Journal of Low Temperature Physics

DOI:https://doi.org/10.1007/BF00753858· OSTI ID:443643

Ishida, Takekazu; Okuda, Kiichi; Asaoka, Hidehito ^[1]

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1. Osaka Prefecture Univ., Sakai (Japan); and others

Real part of the ac susceptibility {chi}{prime}{sub 1} of an untwinned YBa{sub 2}Cu{sub 3}O{sub 7} single crystal jumps at the onset temperature in the narrow width (0.1 K in 0.7 T), suggesting the first-order melting transition. A sharp {chi}{prime}{sub 1} dip and a sharp {chi}{double_prime}{sub 1} peak can be interpreted as synchronous trapping of vortices due to lattice softening prior to melting. At lower temperatures, the {chi}{prime}{sub 1}-{chi}{double_prime}{sub 1} chart shows a single-parameter behavior while the melting occurs as a strong deviation from this.

• Sponsoring Organization: USDOE
• OSTI ID: 443643
• Report Number(s): CONF-960808--; CNN: Grant 0845100
• Journal Information: Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 5-6 Vol. 105; ISSN JLTPAC; ISSN 0022-2291
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
MAGNETIC FLUX
MELTING POINTS
MONOCRYSTALS
PHASE TRANSFORMATIONS
YTTRIUM OXIDES