Hydrostatic pressure dependence of the superconducting transition temperature of HgBa[sub 2]CaCu[sub 2]O[sub 6+[delta]] and HgBa[sub 2]Ca[sub 2]Cu[sub 3]O[sub 8+[delta]]
- Washington Univ., St. Louis, MO (United States). Physics Dept.
- Argonne National Lab., IL (United States)
The dependence of the superconducting transition temperature [Tc](P) on purely hydrostatic pressure to 0.9 GPa has been determined in ac susceptibility studies in a He-gas pressure system for optimally doped ceramic samples of HgBa[sub 2]CaCu[sub 2]O[sub 6+[delta]] and HgBa[sub 2]Ca[sub 2]Cu[sub 3]O[sub 8+[delta]] with superconducting transitions at [Tc](0) [approx equal] 126.6 K and 133.9 K, respectively. [Tc] increases reversibly under hydrostatic pressure at the rates, d[Tc]/dP [approx equal] +1.80 [+-] 0.06 K/GPa and +1.71 [+-] 0.05 K/GPa, respectively. Within experimental error, these values are the same as found previously for optimally doped single-layered HgBa[sub 2]CuO[sub 4+[delta]], where d[Tc]/dP [approx equal] +1.72 [+-] 0.05 K/GPa. Remarkably, the logarithmic volume derivative of [Tc] is nearly identical for all three compounds, dln[Tc]/dlnV [approx equal] [minus]1.20 [+-] 0.05, even though the bulk modulus differs by more than 30%. This provides strong evidence that a common mechanism is responsible for the pressure dependence of the superconducting state in all three compounds.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 7273365
- Report Number(s):
- ANL/MSD/PP-82173; ON: DE96006948; CNN: DMR 91-20000 (JLW)
- Country of Publication:
- United States
- Language:
- English
Similar Records
Hydrostatic pressure dependence of the superconducting transition temperature of HgBa{sub 2}CaCu{sub 2}O{sub 6+delta} and HgBa{sub 2}Cu{sub 3}O{sub 8+delta}.
Flux pinning and the irreversibility lines in the HgBa{sub 2}CuO{sub 4+delta}, HgBa{sub 2}CaCu{sub 2}O{sub 6+delta} and HgBa{sub 2}Ca{sub 2}Cu{sub 3}O{sub 8+delta} compounds.
Related Subjects
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
DATA
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EXPERIMENTAL DATA
HIGH-TC SUPERCONDUCTORS
INFORMATION
MERCURY COMPOUNDS
MERCURY OXIDES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PRESSURE DEPENDENCE
SAMPLE PREPARATION
SCATTERING
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
X-RAY DIFFRACTION