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Absence of a martensitic phase transformation (even an embryonic phase) in potassium as determined by an ultrasound study

David Kubinski

J. Trivisonno

  • Ford Motor Scientific Laboratory, Dearborn, Michigan 48121

  • Physics Department, John Carroll University, Cleveland, Ohio 44118

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Phys. Rev. B 47, 1069 – Published 1 January, 1993

DOI: https://doi.org/10.1103/PhysRevB.47.1069

Abstract

The temperature dependence and magnetic-field dependence of the nonlocal generation of ultrasound were measured between 1.8 and 25 K in high-quality potassium single crystals. The wave associated with the elastic constant C’, which is extremely sensitive to any structural phase transformation, was studied. These electromagnetic-generation experiments clearly show that no anomalies in the elastic behavior occur, either in the bulk or within the skin depth. These measurements lend no support to the existence of a martensitic phase transformation or to the existence of an embryonic martensitic state in stress-free bulk potassium single crystals or within the skin depth of these crystals.

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Phys. Rev. B 47, 1069– Published 1 January, 1993
  • Received 30 June 1992

© 1993 American Physical Society

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