Abstract
The flux jump instability of Bean’s critical state in the flux-creep regime of type-II superconductors is considered. We find the flux-jump field (Formula presented) which determines stability criterion of the superconducting state. The dependence of (Formula presented) on the external magnetic-field ramp rate B(Formula presented) is calculated. We demonstrate that under the conditions typical for most of the magnetization experiments the slope of the current-voltage curve in the flux-creep regime determines the stability of the Bean’s critical state, i.e., the value of (Formula presented). We show that a flux jump can be preceded by magnetothermal oscillations and find the frequency of these oscillations as a function of B(Formula presented).
Original language | English |
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Pages (from-to) | 12311-12317 |
Number of pages | 7 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 53 |
Issue number | 18 |
DOIs | |
State | Published - 1996 |