Anomalous transport and thermal properties of NiTi and with Cu and Fe-doped shape memory alloys near the martensitic transition

Ingale, Babita; Wei, Wu; Chang, P. C.; Kuo, Y. K.; Wu, S.K.

doi:10.1063/1.3666029

Cited by 40 publications

(23 citation statements)

References 30 publications

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“…20 Recently, we investigated electrical and thermal transport studies on 10% Cu and 1.5% Fe substituted TiNi alloys. 22 In this study, a clear thermal hysteresis behavior between warming and cooling condition of resistivity, Seebeck coefficient, and thermal conductivity measurements was observed in the undoped and doped TiNi alloys, which indicated first order martensitic phase transition and also found to be twostage transformation. The anomalous features in the measured physical properties suggested that the modifications in the Fermi surface and strong electron-phonon interaction may play important roles at the martensitic transitions of the TiNi-based alloys.…”

Section: Introductionmentioning

confidence: 87%

“…However, the value of residual resistivity of the parent TiNi alloy is considerably lower than that of previously reported value, 5 suggesting the highly ordered nature of the sample. Moreover, upon cooling from 400 K, the resistivity shows a sharp rise followed by a sudden fall in the form of two well-defined peaks in the parent TiNi alloy, 22 as seen in the inset of Fig. 1(a).…”

Section: A Electrical Resistivitymentioning

confidence: 93%

“…Subsequently, the plates were solution treated at 1173 K for 1 h and then water-quenched; for more details see Ref. 22. Electrical resistivity measurement of the TiNi-based alloy samples was performed using a standard four-point contact method.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, the doping of Cu in Ni sites of TiNi alloy may be resulted in a change in E F and its electronic properties, which in turn has a strong influence on the martensitic transition. 20,22 The Seebeck coefficient is known to be very sensitive to the small changes in the position of Fermi energy (E F ) across the DOS. The sharp variations in the S near martensitic transition indicate a significant modification in the DOS of the Fermi surface.…”

Section: A Electrical Resistivitymentioning

confidence: 99%

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Cu-substitution effect on thermoelectric properties of the TiNi-based shape memory alloys

Ramachandran

Tang

Chang

et al. 2013

Journal of Applied Physics

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We have studied the effects of Cu substitution on thermoelectric properties of Ti50Ni50-xCux (0 ≤ x ≤ 30 at. %) shape memory alloys by means of electrical resistivity (ρ), Seebeck coefficient (S), and thermal conductivity (κ) measurements. From the electrical resistivity and Seebeck coefficient studies, it is found that the Cu substituted TiNi alloys show a metallic nature in the entire temperature range. However, thermal hysteresis behavior was observed in all the TiNi-based alloys near martensitic transition, which confirms the first order phase transition. Transformation starting temperature of B19′ martensite (Ms) is found to be decreased with increase in Cu substitution (x > 5), whereas that of B19 martensite (M′s) increased gradually with Cu content, and the thermal hysteresis behavior becomes weaker upon substitution of Cu. It is also found that the separation between B19 and B19′ phases in the 7.5% Cu doped TiNi alloy is clearly evident in the Seebeck coefficient measurement, which is not seen in the resistivity data. Finally, analysis of thermal conductivity reveals that the anomalous feature in κ at the B19 ↔ B19′ transformation for 7.5, 10, and 15% Cu-substituted TiNi alloys which can be mainly attributed to the electronic contribution, while a large anomalous peak observed at the B19 → B2 transformation in the warming process is due to change in the lattice thermal conductivity. The relative change in thermal conductivity (Δκ/κ) near martensitic transformation is found to be increased with increase in Cu content, reaches a giant value of 200% for 10% Cu-substituted TiNi alloy and then starts to decrease with further Cu substitution.

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Section: Introductionmentioning

confidence: 87%

Section: A Electrical Resistivitymentioning

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Section: A Electrical Resistivitymentioning

confidence: 99%

See 2 more Smart Citations

Cu-substitution effect on thermoelectric properties of the TiNi-based shape memory alloys

Ramachandran

Tang

Chang

et al. 2013

Journal of Applied Physics

Self Cite

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“…Such a change in slope was also found in nonmagnetic Ni 50 Ti 50 alloy and was attributed to phonon drag contribution that was broadened by disorder. 32 However, this feature was not observed in the ferromagnetic shape memory alloy Ni 50 Mn 34 In 16 . 22 Upon heating from 10 K, α(T) exhibits hysteresis at T M as is the case with the resistivity, due to the first-order structural phase transition.…”

Section: Resultsmentioning

confidence: 90%

Magnetic field dependence of electrical resistivity and thermopower in Ni50Mn37Sn13 ribbons

et al. 2015

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We report magnetization, magnetoresistance (MR) and magnetothermopower (MTEP) of melt spun Ni 50 Mn 37 Sn 13 ribbons which exhibit an austentite to martensite phase transition at a temperature (T M ) ≈ 294 K. Upon cooling from 400 K, dcresistivity and thermopower show abrupt changes at T M , indicating a change in the electronic density of states. The thermopower is negative from 400 K down to 10 K. Application of a magnetic field of µ 0 H = 5 T decreases T M by 5 K and induces large negative MR (-23%) but positive MTEP (9%) near T M . While the MR is appreciable from T M down to 10 K, MTEP is significant only below 60 K (MR = -2.5% and MTEP = +300% at 10 K). The magnetic field dependence of resistivity and thermopower show either reversible or irreversible behavior near T M , depending on whether the sample is zero-field cooled or field-cooled, which indicates that the electronic band structure near T M is magnetic history dependent. C 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License. [http://dx

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High Contrast Thermal Conductivity Change in Ni–Mn–In Heusler Alloys near Room Temperature

Zheng

Zhu²,

Diao³

et al. 2019

Adv Eng Mater

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Materials with an abrupt transition between a low and a high thermal conductance state at a critical temperature would be useful for thermal regulation applications. Here, the authors report a high contrast reversible thermal conductivity change through the thermally‐induced martensitic transition (MT) in Ni–Mn–In alloys. The authors measure the thermal conductivity of a wide temperature range 130 < T < 530 K using time‐domain thermoreflectance (TDTR). The thermal conductivity of these alloys increases from ≈7.0–8.5 W m−1 K−1 to ≈11.5–13.0 W m−1 K−1 through the MT near 300 K as temperature rises, with a rate of change among the highest yet reported in solid‐state materials with thermally‐induced phase transitions. Based on Hall resistivity measurements, the authors further show that the change of thermal conductivity is dominated by the electronic contribution, which results from a unique carrier mobility change through the MT. Their findings highlight the interplay between the structural disorders and the thermal transport in alloys through solid‐state phase transitions and open a new avenue in the search of high‐performance materials for thermal regulation.

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Anomalous transport and thermal properties of NiTi and with Cu and Fe-doped shape memory alloys near the martensitic transition

Cited by 40 publications

References 30 publications

Cu-substitution effect on thermoelectric properties of the TiNi-based shape memory alloys

Cu-substitution effect on thermoelectric properties of the TiNi-based shape memory alloys

Magnetic field dependence of electrical resistivity and thermopower in Ni50Mn37Sn13 ribbons

High Contrast Thermal Conductivity Change in Ni–Mn–In Heusler Alloys near Room Temperature

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