Abstract
TiNi-based shape memory alloys have been extensively investigated due to their significant applications,but a compre-hensive understanding of the evolution of electronic structure and electrical transport in a system with martensitic transfor-mations(MT)is still lacking.In this work,we focused on the electronic transport behavior of three phases in Ni50-xFexTi50 across the MT.A phase diagram of Ni50-xFexTi50 was established based on x-ray diffraction,calorimetric,magnetic,and electrical measurements.To reveal the driving force of MT,phonon softening was revealed using first-principles calcula-tions.Notably,the transverse and longitudinal transport behavior changed significantly across the phase transition,which can be attributed to the reconstruction of electronic structures.This work promotes the understanding of phase transitions and demonstrates the sensitivity of electron transport to phase transition.
基金项目
State Key Development Program for Basic Research of China(2019YFA0704900)
State Key Development Program for Basic Research of China(2022YFA1403800)
Fundamental Science Center of the National Natural Science Foundation of China(52088101)
Strategic Priority Research Program(B)of the Chinese Academy of Sciences(CAS)(XDB33000000)
Synergetic Extreme Condition User Facility(SECUF)()
Scientific Instrument Developing Project of CAS(ZD-KYYQ20210003)
NETL
NSTL
万方数据