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AuZn undergoes a shape-memory transition at 67 K. The de Haas van Alpheneffect persists to 100 K enabling the observation of a change in the quantumoscillation spectrum indicative of a catastrophic Fermi surface reconstructionat the transition. Coexistence of both Fermi surfaces at low temperatures issuggestive of an intrinsic phase separation in the bulk of the material. Inaddition, a Dingle analysis reveals a sharp change in the scattering mechanismat a threshold cyclotron radius, which we suggest to be related to theunderlying microstructure that drives the shape-memory effect.Comment: 4 pages, 4 figure

Catastrophic Fermi Surface Reconstruction in the Shape-Memory Alloy AuZn