Electronic transport evolution across the successive structural transitions in Ni_(50-x)Fe_xTi_(50) shape memory alloys  

作　　者：何萍 杨金颖 任秋飒 王彬彬 吴光恒 刘恩克 Ping He;Jinying Yang;Qiusa Ren;Binbin Wang;Guangheng Wu;Enke Liu(Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;School of Materials Science and Engineering,University of Science and Technology of Beijing,Beijing 100083,China)

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [2]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [3]School of Materials Science and Engineering,University of Science and Technology of Beijing,Beijing 100083,China

出　　处：《Chinese Physics B》2024年第7期529-536,共8页中国物理B（英文版）

基　　金：supported by the State Key Development Program for Basic Research of China(Grant Nos.2019YFA0704900 and 2022YFA1403800);the Fundamental Science Center of the National Natural Science Foundation of China(Grant No.52088101);the Strategic Priority Research Program(B)of the Chinese Academy of Sciences(CAS)(Grant No.XDB33000000);the Synergetic Extreme Condition User Facility(SECUF);the Scientific Instrument Developing Project of CAS(Grant No.ZDKYYQ20210003)。

摘　　要：TiNi-based shape memory alloys have been extensively investigated due to their significant applications,but a comprehensive understanding of the evolution of electronic structure and electrical transport in a system with martensitic transformations(MT) is still lacking.In this work,we focused on the electronic transport behavior of three phases in Ni_(50-x)Fe_xTi_(50)across the MT.A phase diagram of Ni_(50-x)Fe_xTi_(50) 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 calculations.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.

关 键 词：martensitic transformation electronic behavior transport properties first-principles calculations 

分 类 号：O469[理学—凝聚态物理]