Ravikumar, G. ; Sahni, V. C. ; Mishra, P. K. ; Rao, T. V. Chandrasekhar ; Banerjee, S. S. ; Grover, A. K. ; Ramakrishnan, S. ; Bhattacharya, S. ; Higgins, M. J. ; Yamamoto, E. ; Haga, Y. ; Hedo, M. ; Inada, Y. ; Onuki, Y. (1998) Manifestation of history-dependent critical currents via dc and ac magnetization measurements in single crystals of CeRu2 and 2H-NbSe2 Physical Review B, 57 (18). R11069-R11072. ISSN 0163-1829
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Official URL: http://link.aps.org/doi/10.1103/PhysRevB.57.R11069
Related URL: http://dx.doi.org/10.1103/PhysRevB.57.R11069
Abstract
A study of path dependent effects in single crystals of CeRu2 and 2H-NbSe2 shows that critical current density Jc of the vortex state depends on its thermomagnetic history over a very large part of (H,T) parameter space. The path dependence in Jc is absent above the peak position (i.e., H>Hp) of the peak effect region, which we believe identifies the complete loss of order in the vortex structure. The highly disordered field cooled (FC) state can be healed into a relatively ordered vortex lattice by subjecting it to a large enough change in dc field (few tens of Oe) or by shaking the field cooled state with sufficient ac field (few Oe).
Item Type: | Article |
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Source: | Copyright of this article belongs to American Physical Society. |
ID Code: | 14748 |
Deposited On: | 12 Nov 2010 13:41 |
Last Modified: | 16 May 2016 23:43 |
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