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VOLUME 49 (1989) | ISSUE 2 | PAGE 83
Observation of an anisotropy of the vortex lattice in the basal plane of a YBa2Cu3Ox single crystal
A technique of decoration by means of finely divided ferromagnetic particles has revealed a contraction of the regular triangular lattice of vortices in the ab plane of a YBa2Cu3Ox single crystal. This contraction is evidence of an anisotropy of the interaction of the vortices in this plane. The ratio of the effective masses of the superconducting carriers along the a and b directions is estimated:μα / μϋ = 1.4 + 0.2.