中国物理B ›› 2024, Vol. 33 ›› Issue (7): 77201-077201.doi: 10.1088/1674-1056/ad39d3

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Electronic transport evolution across the successive structural transitions in Ni50-xFexTi50 shape memory alloys

Ping He(何萍)1,2, Jinying Yang(杨金颖)1,2, Qiusa Ren(任秋飒)1,3, Binbin Wang(王彬彬)1, Guangheng Wu(吴光恒)1, and Enke Liu(刘恩克)1,†   

  1. 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
  • 收稿日期:2024-02-14 修回日期:2024-03-20 接受日期:2024-04-03 出版日期:2024-06-18 发布日期:2024-06-18
  • 通讯作者: Enke Liu E-mail:ekliu@iphy.ac.cn
  • 基金资助:
    This work was 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), and the Scientific Instrument Developing Project of CAS (Grant No. ZDKYYQ20210003).

Electronic transport evolution across the successive structural transitions in Ni50-xFexTi50 shape memory alloys

Ping He(何萍)1,2, Jinying Yang(杨金颖)1,2, Qiusa Ren(任秋飒)1,3, Binbin Wang(王彬彬)1, Guangheng Wu(吴光恒)1, and Enke Liu(刘恩克)1,†   

  1. 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
  • Received:2024-02-14 Revised:2024-03-20 Accepted:2024-04-03 Online:2024-06-18 Published:2024-06-18
  • Contact: Enke Liu E-mail:ekliu@iphy.ac.cn
  • Supported by:
    This work was 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), and the Scientific Instrument Developing Project of CAS (Grant No. ZDKYYQ20210003).

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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$_{x}$Ti$_{50}$ across the MT. A phase diagram of Ni$_{50-x}$Fe$_{x}$Ti$_{50}$ 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

Abstract: 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$_{x}$Ti$_{50}$ across the MT. A phase diagram of Ni$_{50-x}$Fe$_{x}$Ti$_{50}$ 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.

Key words: martensitic transformation, electronic behavior, transport properties, first-principles calculations

中图分类号:  (Electronic conduction in metals and alloys)

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