Anisotropic vortex lattice in YBa2Cu3O7

M. Yethiraj*, H. A. Mook, G. D. Wignall, R. Cubitt, E. M. Forgan, S. L. Lee, D. M. Paul, T. Armstrong

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)


We report on small angle neutron scattering observations of the flux line lattice (FLL) in a single crystal of YBa2Cu3O7. To probe the mass anisotropy ratio, m3/m1, measurements were made as a function of angle, Θ, between the 8 kOe applied field and the crystallographic (001) axis for 0°≤Θ≤80°. With the rotation about an a/b (or y) axis, two symmetry-related distorted hexagonal FLL domains formed. Contrary to theoretical prediction, the lattices formed are consistent with a rotation of the short basis vector, a1, from the x axis by 15°, after the effects of anisotropy are removed. The mass ratio is 20±2, which is slightly lower than published values. The temperature dependence of the intensity is not conventional.

Original languageEnglish
Pages (from-to)3019-3022
Number of pages4
JournalPhysical Review Letters
Issue number18
Publication statusPublished - 1993


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