Vortex lattice structures in YNi{sub 2}B{sub 2}C

Conference · Mon Dec 01 04:00:00 EST 1997

OSTI ID:554839

Yethiraj, M ^[1]; Paul, D M; Tomy, C V ^[2]; Forgan, E M ^[3]

---

1. Oak Ridge National Lab., TN (United States). Solid State Div.
2. Univ. of Warwick, Coventry (United Kingdom). Dept. of Physics
3. Univ. of Birmingham (United Kingdom). Dept. of Physics

The authors 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, they 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 100 crystal direction is larger than the penetration depth along the 110 by approximately 60%. This is the likely reason for the square symmetry of the lattice. Although they 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., TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 554839
• Report Number(s): ORNL/CP--95242; CONF-970814--; ON: DE98000793; BR: KC0202010
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
MAGNETIC FLUX
NEUTRON DIFFRACTION
NICKEL BORIDES
NICKEL CARBIDES
PENETRATION DEPTH
SUPERCONDUCTIVITY
YTTRIUM BORIDES
YTTRIUM CARBIDES