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23 April 2024 |
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Article overview
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Vortex Lattice Jamming and Metastability Studies by Small Angle Neutron Scattering | | C. Rastovski
; K. J. Schlesinger
; W. J. Gannon
; C. D. Dewhurst
; L.DeBeer-Schmitt
; N. D. Zhigadlo
; J. Karpinski
; M. R. Eskildsen
; | | Date: |
2 May 2013 | | Abstract: | Recently extensive vortex lattice metastability was reported in MgB2 in
connection with a second order rotational phase transition. However, the
mechanism responsible for these well-ordered metastable vortex lattice phases
is not well understood. Using small-angle neutron scattering, we studied the
vortex lattice in MgB2 as it was driven from a metastable to the ground state
through a series of small changes in the applied magnetic field. Our results
show that metastability in MgB2 is not the result of pinning defects. Rather,
we propose that it is due to the jamming of counter rotated vortex lattice
domains which prevents a rotation to the ground state orientation. Although
granular jamming has been applied to the motion of individual vortices, this is
the first experimental evidence that vortex lattice domains can act as granular
entities. | | Source: | arXiv, 1305.0494 | | Services: | Forum | Review | PDF | Favorites | |
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