Anisotropy in spatial order-disorder transformations and the vortex lattice symmetry transition in YNi2B2C and LuNi2B 2C

D. Jaiswal-Nagar, T. Isshiki, N. Kimura, Hayuyoshi Aoki, H. Takeya, S. Ramakrishnan, A. K. Grover

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Explorations of the order-disorder transformation in vortex matter in single crystals of tetragonal structured (c/a∼3) borocarbide superconductors, YNi2B2C and LuNi2B 2C, reveal that vortex arrays experience different effective pinning in different crystallographic directions. We surmise that correlation exists between the large anisotropy in effective pinning/disorder and the differences in the (local) symmetry transition from rhombohedral to (quasi)square vortex lattice(VL). For a field along high-symmetry directions, like, the c-axis and ab basal plane, the VL symmetry is close to square and the ordered state spans a large field interval. When the field is turned away from the c-axis towards the ab-plane, at intermediate angles, the region of the ordered state shrinks, in response to enhancement in effective pinning. At such intermediate angles the symmetry of the VL would be far from ideal triangular or square.

Original languageEnglish
Article number67004
JournalEPL
Volume84
Issue number6
DOIs
Publication statusPublished - 2008 Jan 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Anisotropy in spatial order-disorder transformations and the vortex lattice symmetry transition in YNi<sub>2</sub>B<sub>2</sub>C and LuNi<sub>2</sub>B <sub>2</sub>C'. Together they form a unique fingerprint.

Cite this