Modulation in the non-uniformity of the vortex state across the peak effect: evidence via the magnetic quadrupole moment in a very clean crystal of 2H-NbSe2 for H∥c

Pal, D. ; Ramakrishnan, S. ; Grover, A. K. ; Higgins, M. J. ; Chandran, Mahesh (2002) Modulation in the non-uniformity of the vortex state across the peak effect: evidence via the magnetic quadrupole moment in a very clean crystal of 2H-NbSe2 for H∥c Physica C: Superconductivity, 369 (1-4). pp. 200-208. ISSN 0921-4534

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/S0921-4534(01)01242-4

Abstract

The non-uniform magnetic character of the mixed (vortex) state is known to result in a magnetic quadrupolar response of a type-II superconductor. The nucleation of stronger pinned regions coexisting with weaker pinned regions across the peak effect (PE) in a weakly pinned superconductor has been demonstrated using ac scanning Hall bar microscopy by Marchevsky et al. [Nature 409 (2001) 591]. Coexistence of this nature could produce an imprint in the measured quadrupolar response of such samples. We present successful detection of such an imprint across the PE region of a very clean crystal of 2H-NbSe2 for H//c via a well-established procedure of preferentially recording a signal arising from the non-uniformity in the magnetization of the sample in a vibrating sample magnetometer.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Vortex State; Quadrupole Moment; Peak Effect
ID Code:68526
Deposited On:05 Nov 2011 05:09
Last Modified:10 Jul 2012 08:01

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