Fermi Surface of a Shape Memory Alloy of TiNi

Shiotani, N.; Matsumoto, Isao; Kawata, Hiroshi; Katsuyama, Jinya; Mizuno, Masataka; Araki, Hideki; Shirai, Yoshihito

doi:10.1143/jpsj.73.1627

Cited by 10 publications

(10 citation statements)

References 21 publications

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“…By measuring Compton profiles along 28 different crystallographic directions in a single crystal of Ni 0.515 Ti 0.485 , and then reconstructing them using a direct Fourier method, 96 Shiotani et al were able to infer the Fermi surface. 97 In contrast to Ni 1-x Al x , the nested regions of Fermi surface are harder to see directly, and while the overall Fermi surface topology is very close to that predicted by Zhao and Harmon, they do point out some discrepancies (which could be due to the treatment, or rather the lack of treatment of the substitutional disorder).…”

Section: Ni 1-x Ti Xsupporting

confidence: 59%

Probing the Fermi surface by positron annihilation and Compton scattering

Dugdale

2014

Low Temperature Physics

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Section: Ni 1-x Ti Xsupporting

confidence: 59%

Probing the Fermi surface by positron annihilation and Compton scattering

Dugdale

2014

Low Temperature Physics

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“…The electronic nature of this softening originates from the to charge density wave instability related to nesting vectors in the Fermi surface. [35][36][37] (see supplement materials). It is obvious that phonon dispersion curves of the parent cubic phase contain information closely related to the potential martensite phases and related transformations.…”

Section: Resultsmentioning

confidence: 99%

Blocking of the martensitic transition at the nanoscale in a Ti2NiCu wedge

et al. 2020

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Shape memory effect associated with martensitic transformations is of the rapidly developing field in nanotechnologies, where industrial use of systems established on that effect provide greater flexibility on the nano-devices fabrication of various kind. And therefore it addresses questions to the phase transition phenomena at low-scale and 1 arXiv:2002.07132v1 [cond-mat.mtrl-sci] 4 Feb 2020 its limitations and control. In this report, we studied the crystal structure of tapered plates of Ti 2 NiCu alloy and the temperature T c at which the martensitic transition occurs. We demonstrated that T c has a strongly descending character as a function of the plate thickness h. The critical thickness value at which the transition completely suppressed is 20 nm. Moreover, the obtained results for T c (h) curves indicate the hysteretic nature of the transition. These findings open the pathway for size limits indication and regimes modulation where the alloy-based nano-mechanical devices can be tuned to operate more efficiently.

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“…A previous attempt (also using Compton scattering) to establish a connection between the Fermi surface topology and any shape-memory behavior [20] was unsuccessful, principally due to the complexity of the Fermi surface of their Ti 48.5 Ni 51.5 alloy. Here, we present our measurement of the Fermi surface of Ni 0.62 Al 0.38 using the technique of Compton scattering [21].…”

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confidence: 99%

Observation of a Strongly Nested Fermi Surface in the Shape-Memory AlloyNi0.62Al0.38

et al. 2006

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The Fermi surface topology of the shape-memory alloy Ni0.62Al0.38 has been determined using Compton scattering. A large area of this Fermi surface can be made to nest with other areas by translation through a vector of ≈ 0.18 [1, 1, 0](2π/a), which correponds to the wavevector associated with martensitic precursor phenomena such as phonon softening and diffuse streaking in electron diffraction patterns. This observation is compelling evidence that these phenomena are driven by the enhanced electron-lattice coupling due to the Fermi surface nesting.

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Fermi Surface of a Shape Memory Alloy of TiNi

Cited by 10 publications

References 21 publications

Probing the Fermi surface by positron annihilation and Compton scattering

Probing the Fermi surface by positron annihilation and Compton scattering

Blocking of the martensitic transition at the nanoscale in a Ti2NiCu wedge

Observation of a Strongly Nested Fermi Surface in the Shape-Memory AlloyNi0.62Al0.38

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