Journal article · Preprint article
Field dependence of the superconducting basal plane anisotropy of TmNi2B2C
Department of Physics, University of Notre Dame
USA, Res Lab, Aberdeen Proving Ground, MD 21005 USA
Materials Research Division
Support, Niels Bohr Institute, Faculty of Science, Københavns Universitet
The superconductor TmNi2B2C possesses a significant four-fold basal plane anisotropy, leading to a square Vortex Lattice (VL) at intermediate fields. However, unlike other members of the borocarbide superconductors, the anisotropy in TmNi2B2C appears to decrease with increasing field, evident by a reentrance of the square VL phase.
We have used Small Angle Neutron Scattering measurements of the VL to study the field dependence of the anisotropy. Our results provide a direct, quantitative measurement of the decreasing anisotropy. We attribute this reduction of the basal plane anisotropy to the strong Pauli paramagnetic effects observed in TmNi2B2C and the resulting expansion of vortex cores near Hc2.
Language: | English |
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Publisher: | American Physical Society (APS) |
Year: | 2012 |
Pages: | 8 |
ISSN: | 1550235x , 10980121 and 24699950 |
Types: | Journal article and Preprint article |
DOI: | 10.1103/PhysRevB.86.144501 |