Magnetic structure of the heavy fermion alloy CeCu5.5Au0.5

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Abstract

Neutron diffraction measurements were performed on a single crystal of the heavy fermion compound CeCu5.5Au0.5. Below TN = 1.00 ± 0.05 K an incommensurate magnetic structure was found with wave vector q = ( ± 0.59, 0, 0), which completely explains the previous powder diffraction data. This wave vector differs from the wave vectors characterizing the correlated fluctuations in CeCu6, where q along the a direction is commensurate.

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