Phys. Rev. Lett. 83, 3920–3923 (1999)Fourfold Basal Plane Anisotropy of the Nonlocal Magnetization of YNi2B2CReceived 8 July 1999; published in the issue dated 8 November 1999 Studies of single crystal YNi2B2C have revealed a fourfold anisotropy of the equilibrium magnetization in the square crystallographic basal plane. This π/2 periodicity occurs deep in the superconductive mixed state. In this crystal symmetry, an ordinary superconductive mass anisotropy (as in usual London theory) allows only a constant, isotropic response. In contrast, the experimental results are well described by generalized London theory incorporating nonlocal electrodynamics, as needed for this clean, intermediate- κ superconductor. © 1999 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.83.3920
DOI:
10.1103/PhysRevLett.83.3920
PACS:
74.25.Ha, 74.25.Bt, 74.70.Dd
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