Effect of twin boundary density on the vortex melting transition in YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} single crystals
- Argonne National Lab., IL (United States)
The authors present magnetotransport {rho}(H,T) measurements in clean untwinned and twinned crystals of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} in magnetic fields up to 8 Tesla for H {parallel} c. In untwinned crystals, they show strong support for a vortex solid to liquid first order melting transition at a temperature T{sub m}, much below the mean field transition temperature T{sub c}(H), characterized by an extremely sharp drop in resistivity {rho}(T{sub m}) and the appearance of hysteretic behavior at {rho}(H{sub m}). In densely twinned crystals, the sharp transition is replaced with a continuous transition at a higher temperature T{sub BG} > T{sub m}. Furthermore, the cusp in T{sub BG}({theta}) predicted by the Bose glass theory at fixed field is observed. In dilutely twinned crystals they demonstrate the competing effect of pinning and freezing at the phase transition. The vortex solid state at low fields is characterized by the appearance of a ``peak effect`` just below the melting temperature.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 10130381
- Report Number(s):
- ANL/MSD/CP--82175; CONF-940122--2; ON: DE94007684; CNN: Contract DMR 91-20000
- Country of Publication:
- United States
- Language:
- English
Similar Records
The effect of correlated and point defects on the vortex lattice melting transition in single crystal YBa{sub 2}Cu{sub 3}O{sub 7-{delta}}
Vortex shear modulus and lattice melting in twin boundary channels of YBa{sub {bold 2}}Cu{sub {bold 3}}O{sub {bold 7{minus}}}{ital {delta}}
Anisotropy of the magnetization discontinuity at the vortex-lattice melting in untwinned YBa{sub 2}Cu{sub 3}O{sub 7-delta}.
Conference
·
Sun Aug 01 00:00:00 EDT 1993
·
OSTI ID:10185369
Vortex shear modulus and lattice melting in twin boundary channels of YBa{sub {bold 2}}Cu{sub {bold 3}}O{sub {bold 7{minus}}}{ital {delta}}
Journal Article
·
Sat Jun 01 00:00:00 EDT 1996
· Physical Review Letters
·
OSTI ID:285771
Anisotropy of the magnetization discontinuity at the vortex-lattice melting in untwinned YBa{sub 2}Cu{sub 3}O{sub 7-delta}.
Journal Article
·
Mon Jan 31 23:00:00 EST 2000
· Phys. Rev. B
·
OSTI ID:942731