Fermi surface as a driver for the shape-memory effect in AuZn

Martensites are materials that undergo diffusionless, solid-state transitions. The martensitic transition yields properties that depend on the history of the material and may allow it to recover its previous shape after plastic deformation. This is known as the shape-memory effect (SME). We have succeeded in identifying the primary electronic mechanism responsible for the martensitic transition in the shape-memory alloy AuZn by using Fermi-surface measurements (de Haas–van Alphen oscillations) and band-structure calculations. This strongly suggests that electronic band structure is an important consideration in the design of future SME alloys.

[1]  J. Zimmer,et al.  Crystal symmetry and the reversibility of martensitic transformations , 2004, Nature.

[2]  R. Romero,et al.  Change of entropy in the martensitic transformation and its dependence in Cu-based shape memory alloys , 2003 .

[3]  Y. Ando,et al.  Antiferromagnets: Magnetic shape-memory effects in a crystal , 2002, Nature.

[4]  Yoichi Ando,et al.  Antiferromagnets: Magnetic shape-memory effects in a crystal , 2002, Nature.

[5]  Kristi S. Anseth,et al.  New Directions in Photopolymerizable Biomaterials , 2002 .

[6]  T. W. Duerig,et al.  The Use of Superelasticity in Modern Medicine , 2002 .

[7]  T. Darling,et al.  Elastic and thermodynamic properties of the shape-memory alloy AuZn , 2001, cond-mat/0108168.

[8]  H. Harima,et al.  Electronic structure of ThBe{sub 13} , 2000 .

[9]  G. Barsch.  Landau Theory of the Displacive Phase Transformations in Gold-Cadmium and Titanium-Nickel Alloys , 2000 .

[10]  Y. Morii,et al.  Phonon dispersion relations of premartensitic β1-phase in AuZn alloys , 1995 .

[11]  M. Ahlers.  The Hume-Rothery rules and phase stabilities in noble metal alloys , 1995 .

[12]  G. Grüner,et al.  Density Waves In Solids , 1994 .

[13]  G. Lander,et al.  The solid-state properties of uranium A historical perspective and review , 1994 .

[14]  Alexei Abrikosov,et al.  Fundamentals of the theory of metals , 1988 .

[15]  J. Perkins,et al.  Shape Memory Effects in Alloys , 1975 .

[16]  C. M. Wayman,et al.  The Shape Memory (‘Marmem’) Effect in Alloys , 1972 .

[17]  D. S. Lieberman,et al.  Self-Diffusion and Correlation Effects in Ordered AuZn Alloys , 1971 .

[18]  T. Read,et al.  Cubic to Orthorhombic Diffusionless Phase Change— Experimental and Theoretical Studies of AuCd , 1955 .

[19]  Taylor Francis Online.  Advances in physics , 1952 .