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Insensitivity of nucleation rate to order-disorder interfaces in reversible thermoelastic martensitic transformations

https://doi.org/10.1103/PhysRevMaterials.8.014411

Lago, J_C; Cho, W.; Salas, D.; Karaman, I.; Shamberger, P_J (January 2024, Physical Review Materials)
Substrate effects in hysteresis of microscale Ni–Mn–Sn Heusler alloy films

https://doi.org/10.1063/5.0159129

Zhang, Yijia; Zhao, Dexin; Lago, Juan C; Xie, Kelvin; Shamberger, Patrick J (August 2023, Applied Physics Letters)

During martensitic phase transformations in thin films, substrates impact hysteresis by introducing an additional interface, which can inhibit martensite/austenite interface motion. In order to reduce hysteresis, we examine 2.9–14.5 μm thick Ni–Mn–Sn films, which in some cases have been delaminated from the substrates before or after annealing. We compare thermal hysteresis and defect densities at the interface. Delaminating films prior to annealing decreases hysteresis, whereas delaminating films after annealing does not significantly impact hysteresis. Substrate effects are attributed to the thermal expansion mismatch between the film and substrate, resulting in the formation of dislocations at the interface and, consequentially, an increase in frictional resistance to martensite/austenite interface motion.
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Thermal Impedance and Dynamics of Phase Change Materials under Pulse Train Heating

https://doi.org/10.1109/ITherm55368.2023.10177585

Lago, JC; Fernandez, V Gonzalez; Barako, MT; Shamberger, PJ (May 2023, IEEE)

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Nucleation site potency distributions in thermoelastic martensitic transformation in ${Ni}_{43} {Co}_{7} {Mn}_{39} {Sn}_{11}$ particles

https://doi.org/10.1103/PhysRevMaterials.5.023401

Zhang, Yijia; Lago, Carlos; Karaman, Ibrahim; Shamberger, Patrick J. (February 2021, Physical Review Materials)
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