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- Title
Increasing thermomagnetic stability of composite superconductors with additives of extremely-large-heat-capacity substances.
- Authors
Keilin, V. E.; Kovalev, I. A.; Kruglov, S. L.; Lupanov, D. É.; Shcherbakov, V. I.
- Abstract
We have studied the thermomagnetic stability (with respect to magnetic flux disturbances) of composite superconductors screened by additives of rare earth compounds possessing extremely high heat capacity at low temperatures. Three tubular composite structures have been manufactured and studied with respect to screening of the central region from variations of an external magnetic field. The effect of large-heat-capacity substances (LHCSs) was evaluated by measuring a jump in the magnetic flux in response to the rate of variation (ramp) of the external magnetic field. It is established that the adiabatic criterion of stability (magnetic-flux jump field) in the sample structures containing LHCSs significantly increases—by 20% for HoCu2 intermetallic compound and 31% for Gd2O2S ceramics—as compared to the control structure free of such additives.
- Subjects
MAGNETIC fields; FIELD theory (Physics); GEOMAGNETISM; THERMOMAGNETISM; MAGNETISM; GALVANOMAGNETIC effects; MAGNETIZATION
- Publication
Technical Physics Letters, 2008, Vol 34, Issue 5, p418
- ISSN
1063-7850
- Publication type
Article
- DOI
10.1134/S1063785008050179