Vortex structure and dynamics in YNi 2 B 2 C single crystal<mml:math xmlns:mml="http://www.w3.org/1998/…
2000; American Physical Society; Volume: 62; Issue: 1 Linguagem: Inglês
10.1103/physrevb.62.123
ISSN1095-3795
AutoresK. H. Lee, B. J. Mean, G. S. Go, S. Seo, Kee Sung Han, Da‐Hye Kim, Moohee Lee, B. K. Cho, S. I. Lee,
Tópico(s)Advanced Condensed Matter Physics
Resumo${}^{11}\mathrm{B}$ NMR measurements have been performed on a single crystal of ${\mathrm{YNi}}_{2}{\mathrm{B}}_{2}\mathrm{C}$ superconductor to investigate the vortex structure and dynamics. Below ${T}_{c},$ the ${}^{11}\mathrm{B}$ NMR spectrum, shift, linewidth, and transverse relaxation rate ${1/T}_{2}$ exhibit distinct features from which three vortex phases are identified, namely, vortex liquid, glass, and lattice. Also, thermal hysteresis of the saddle-point field, motional narrowing of linewidth, and double-peak structure of ${1/T}_{2}$ altogether indicate significant thermal motion of vortices in this low ${T}_{c}$ and nearly isotropic three-dimensional superconductor.
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