Abstract

Recent transmission electron microscopy (TEM) data on the heavy fermion superconductor UPt 3 find a complex periodic modulation in the basal plane, the nature of which is unclear. We present TEM data on single crystal whiskers of UPt 3 grown spontaneously from the melt. We find a modulation in the a− c plane, consistent with a description in terms of a single q, allowing us to present the first accurate determination of the c ∗ component of the modulation. This structure persists across a wide area of the whisker, making these samples candidates for X-ray studies of the modulation.

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