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Paramagnetic magnetization signals and curious metastable behaviour in field-cooled magnetization of a single crystal of superconductor 2H-NbSe2
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Kumar, Santosh, Tomy, C. V., Balakrishnan, Geetha, Paul, Don McK. and Grover, A. K. (2015) Paramagnetic magnetization signals and curious metastable behaviour in field-cooled magnetization of a single crystal of superconductor 2H-NbSe2. Journal of Physics: Condensed Matter, 27 (29). 295701. doi:10.1088/0953-8984/27/29/295701
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Official URL: http://dx.doi.org/10.1088/0953-8984/27/29/295701
Abstract
We present here some newer characteristics pertaining to paramagnetic Meissner effect like response in a single crystal of the low Tc superconducting compound 2H-NbSe2 via a detailed study of effects of perturbation on the field-cooled magnetization response. In the temperature range, where an anomalous paramagnetic magnetization occurs, the field-cooled magnetization response is found to be highly metastable: it displays a curious tendency to switch randomly from a given paramagnetic value to a diamagnetic or to a different paramagnetic value, when the system is perturbed by an impulse of an externally applied ac field. The new facets revealed in a single crystal of 2H-NbSe2 surprisingly bear a marked resemblance with the characteristics of magnetization behaviour anticipated for the giant vortex states with multiple flux quanta (Lphi0, phi0 = hc/2e, L > 1) predicted to occur in mesoscopic-sized superconducting specimen and possible transitions amongst such states.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Library of Congress Subject Headings (LCSH): | Superconductors -- Magnetic properties, Paramagnetism, Diamagnetism | ||||
| Journal or Publication Title: | Journal of Physics: Condensed Matter | ||||
| Publisher: | IOP Publishing Ltd | ||||
| ISSN: | 0953-8984 | ||||
| Official Date: | 8 July 2015 | ||||
| Dates: |
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| Volume: | 27 | ||||
| Number: | 29 | ||||
| Article Number: | 295701 | ||||
| DOI: | 10.1088/0953-8984/27/29/295701 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Copyright Holders: | IOP Publishing Ltd | ||||
| Funder: | Tata Institute of Fundamental Research, Council of Scientific & Industrial Research (India), Engineering and Physical Sciences Research Council (EPSRC) | ||||
| Grant number: | EP/I007210/1 |
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