2007
DOI: 10.1103/physrevb.75.205119
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Electronic instabilities in shape-memory alloys: Thermodynamic and electronic structure studies of the martensitic transition

Abstract: Using a variety of thermodynamic measurements made in magnetic fields, we show evidence that the diffusionless transition (DT) in many shape-memory alloys is related to significant changes in the electronic structure. We investigate three alloys that show the shape-memory effect (In-24 at.% Tl, AuZn, and U-26 at.% Nb). We observe that the DT is significantly altered in these alloys by the application of a magnetic field. Specifically, the DT in InTl-24 at.% shows a decrease in the DT temperature with increasin… Show more

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Cited by 10 publications
(6 citation statements)
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“…Due to the low martensitic transition temperature in AuZn, magneto‐acoustic oscillations are observable in the speed of sound. The frequency of oscillations are in accord with the frequencies measured in de Haas–van Alphen measurements, and the temperature dependence of the amplitudes are in accord with the Lifshitz–Kosevich formulae 4. A theoretical framework has been created 6 that describes the effect of the field on the lattice dynamics in which the field dependence originates from the dielectric constant.…”
Section: Introductionsupporting
confidence: 73%
See 1 more Smart Citation
“…Due to the low martensitic transition temperature in AuZn, magneto‐acoustic oscillations are observable in the speed of sound. The frequency of oscillations are in accord with the frequencies measured in de Haas–van Alphen measurements, and the temperature dependence of the amplitudes are in accord with the Lifshitz–Kosevich formulae 4. A theoretical framework has been created 6 that describes the effect of the field on the lattice dynamics in which the field dependence originates from the dielectric constant.…”
Section: Introductionsupporting
confidence: 73%
“…We consider the class of materials including AuZn and V 3 Si in which the lattice dynamics and structural transition is strongly affected by an applied magnetic field 4, 5. Due to the low martensitic transition temperature in AuZn, magneto‐acoustic oscillations are observable in the speed of sound.…”
Section: Introductionmentioning
confidence: 99%
“…Another possible relevance of anharmonicities is in the study of spin systems in high pulsed magnetic fields and Raman experiments [12].…”
Section: Introductionmentioning
confidence: 99%
“…The relevance of anharmonic couplings has also been discussed in relation to a great variety of compounds, both from an experimental [8][9][10] and a theoretical point of view [11], including the family of pyrochlore oxide superconductors, AOs 2 O 6 for A=Cs, Rb, and K [8], the heavy fermion superconductors PrOs 4 Sb 12 , SmOs 4 Sb 12 [9], and some potentially thermoelectric materials such as X 8 Ga 16 Ge 30 (X=Eu, Sr, Ba) [10], etc. Another possible relevance of anharmonicities is in the study of spin systems in high pulsed magnetic fields and Raman experiments [12].…”
Section: Introductionmentioning
confidence: 99%
“…Indium-thallium, similar to other dilute indium alloys such as indium-bismuth, indium-cadmium, indium-lead, and indium-tin, exhibits a phase transition which is driven by the electronic contribution to the free energy of the system [18]. This is also evidenced by the rapid variation of M s with composition and the observed depression of M s with applied magnetic field [19].…”
Section: An Alternative View For the In-tl Transformationmentioning
confidence: 91%