title: Simultaneous enhancement of magnetic and mechanical properties in Ni-Mn-Sn alloy by Fe doping.
abstract: Both magnetic-field-induced reverse martensitic transformation (MFIRMT) and mechanical properties are crucial for application of Ni-Mn-Sn magnetic shape memory alloys. Here, we demonstrate that substitution of Fe for Ni can simultaneously enhance the MFIRMT and mechanical properties of Ni-Mn-Sn, which are advantageous for its applications. The austenite in Ni44Fe6Mn39Sn11shows the typical ferromagnetic magnetization with the highest saturation magnetization of 69 emu/g at 223 K. The result shows that an appropriate amount of Fe substitution can really enhance the ferromagnetism of Ni50Mn39Sn11alloy in austenite, which directly leads to the enhancement of MFIRMT. Meanwhile, the mechanical property significantly improves with Fe doping. When there is 4 at.% Fe added, the compressive and maximum strain reach the maximum value (approximately 725.4 MPa and 9.3%). Furthermore, using first-principles calculations, we clarify the origin of Fe doping on martensitic transformation and magnetic properties.
authors.affiliation: College of Applied Science, Harbin University of Science and Technology, Harbin 150080, China.
authors.forename: Changlong
authors.initials: C
authors.lastname: Tan
authors.affiliation: College of Applied Science, Harbin University of Science and Technology, Harbin 150080, China.
authors.forename: Zhipeng
authors.initials: Z
authors.lastname: Tai
authors.affiliation: College of Applied Science, Harbin University of Science and Technology, Harbin 150080, China.
authors.forename: Kun
authors.initials: K
authors.lastname: Zhang
authors.affiliation: College of Applied Science, Harbin University of Science and Technology, Harbin 150080, China.
authors.forename: Xiaohua
authors.initials: X
authors.lastname: Tian
authors.affiliation: School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Cai