Published January 1, 1995
| Version v1
Journal article
Surface barrier in Hg-based polycrystalline superconductors
- 1. National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306-4005 (United States)
- 2. Department of Physics, The University of Tennessee, Knoxville, Tennessee 37996-1200 (United States)
- 3. Solid State Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831-6061 (United States)
- 4. Department of Mechanical Engineering, Florida A ampersand M University, Tallahassee, Florida 32308 (United States)
- 5. National High Magnetic Field Laboratory and College of Engineering, Florida State University, Tallahassee, Florida 32306-4005 (United States)
- 6. Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831-6100 (United States)
Description
Pronounced effects of a surface barrier are frequently observed on polycrystalline superconductors of HgBa2Can-1CunO2n+2+Δ [Hg-12(n-1)n] with n=1, 2, and 3. Compared with other known high-temperature superconductors, the effects at low temperatures are much stronger and persist over a wide range of magnetic fields. The present analysis shows that the enhancement of the irreversible magnetization of grains by the surface barrier is comparable to that by neutron irradiations. The magnitude of the surface supercurrent density is >4x107 A/cm2 at T=40 K and H=45 kG, for Hg-1223. The upper and lower boundaries of the thickness of the vortex-free region and the surface-current density are analyzed as functions of temperature and field
Additional details
Publishing Information
- Journal Title
- Physical Review. B, Condensed Matter
- Journal Volume
- 51
- Journal Issue
- 1
- Journal Page Range
- p. 581-588.
- ISSN
- 0163-1829
- CODEN
- PRBMDO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 26032583
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- BARIUM OXIDES; CALCIUM OXIDES; COPPER OXIDES; HIGH-TC SUPERCONDUCTORS; MAGNETIC FLUX; MERCURY OXIDES; NEUTRON BEAMS; PHYSICAL RADIATION EFFECTS; POLYCRYSTALS; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0013-0065 K
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; BEAMS; CALCIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CRYSTALS; MERCURY COMPOUNDS; NUCLEON BEAMS; OXIDES; OXYGEN COMPOUNDS; PARTICLE BEAMS; RADIATION EFFECTS; SUPERCONDUCTORS; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS