J. Mater. Sci. Technol. ›› 2020, Vol. 58: 145-154.DOI: 10.1016/j.jmst.2020.05.009

• Research Article • Previous Articles     Next Articles

Magnetic-field-driven reverse martensitic transformation with multiple magneto-responsive effects by manipulating magnetic ordering in Fe-doped Co-V-Ga Heusler alloys

Kai Liua,b, Shengcan Maa,*(), Yuxi Zhanga, Hai Zenga,b, Guang Yua,b, Xiaohua Luoa, Changcai Chena, Sajjad Ur Rehmana,b, Yongfeng Huc, Zhenchen Zhonga   

  1. aJiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices/Institute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, China
    bSchool of Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
    cCanadian Light Source, University of Saskatchewan, Saskatoon, Saskatchewan S7N 2V3, Canada
  • Received:2020-02-16 Accepted:2020-04-07 Published:2020-12-01 Online:2020-12-17
  • Contact: Shengcan Ma

Abstract:

Nowadays, searching for the materials with multiple magneto-functional properties and good mechanical properties is vital in various fields, such as solid-state refrigeration, magnetic actuators, magnetic sensors and intelligent/smart devices. In this work, the magnetic-field-induced metamagnetic reverse martensitic transformation (MFIRMT) from paramagnetic martensite to ferromagnetic austenite with multiple magneto-responsive effects is realized in Fe-doped Co-V-Ga Heusler alloys by manipulating the magnetic ordering. The martensitic transformation temperature Tm reduces quasi-linearly with increasing Fe-content. In strikingly contrast with the Fe-free alloys, the magnetization difference (ΔM') across martensitic transformation increases by three orders of magnitude for Fe-doped alloys. The increased ΔM' should be ascribed to the reduction of Tm, almost unchanged Curie temperature of austenite and the increased magnetic moment in the samples with higher Fe-content. The large ΔM' provides strong driving force to realize the MFIRMT and accordingly multiple magneto-responsive effects, such as magnetocaloric, magnetoresistance and magnetostriction effects. Meanwhile, giant Vickers hardness of 518 HV and compressive strength of 1423 MPa are achieved. Multiple magneto-responsive effects with exceptional mechanical properties make these alloys great potential candidates for applications in many fields.

Key words: Magneto-functional properties, Mechanical properties, Ferromagnetic ordering, Reverse martensitic transformation, Multiple magneto-responsive effects, Co-based Heusler alloys