Vortex lattice structures in YNi{sub 2}B{sub 2}C
- Oak Ridge National Lab., TN (United States)
- Univ. of Warwick, Conventry (United Kingdom). Dept. of Physics; and others
We observe a flux lattice with square symmetry in the superconductor YNi{sub 2}B{sub 2}C when the applied field is parallel to the c-axis of the crystal. A square lattice observed previously in the isostructural magnetic analog ErNi{sub 2}B{sub 2}C was attributed to the interaction between magnetic order in that system and the flux lattice. Since the Y-based compound does not order magnetically, it is clear that the structure of the flux lattice is unrelated to magnetic order. In fact, we show that the flux lines have a square cross-section when the applied field is parallel to the c-axis of the crystal, since the measured penetration depth along the 110 crystal direction is smaller than the penetration depth along the 100 by approximately 30%. This causes the square symmetry of the lattice. Although we find considerable disorder in the arrangement of the flux lines at 2.5T, no melting of the vortex lattice was observed.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (United States)
- DOE Contract Number:
- AC05-96OR22464
- OSTI ID:
- 522770
- Report Number(s):
- CONF-970814-4; ON: DE97008444; TRN: 97:005022
- Resource Relation:
- Conference: International conference on neutron scattering (ICNS), Toronto (Canada), 17-21 Aug 1997; Other Information: PBD: 1997
- Country of Publication:
- United States
- Language:
- English
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