Magnetoresistance and Thermal Transformation Arrest in Pd2Mn1.4Sn0.6 Heusler Alloys

Xiao Xu; Hironari Okada; Yusuke Chieda; Naoki Aizawa; Daiki Takase; Hironori Nishihara; Takuo Sakon; Kwangsik Han; Tatsuya Ito; Yoshiya Adachi; Takumi Kihara; Ryosuke Kainuma; Takeshi Kanomata

doi:10.3390/ma12142308

Magnetoresistance and Thermal Transformation Arrest in Pd₂Mn_1.4Sn_0.6 Heusler Alloys

Materials (Basel). 2019 Jul 19;12(14):2308. doi: 10.3390/ma12142308.

Authors

Xiao Xu¹, Hironari Okada², Yusuke Chieda², Naoki Aizawa², Daiki Takase², Hironori Nishihara³, Takuo Sakon⁴, Kwangsik Han⁵, Tatsuya Ito⁵, Yoshiya Adachi⁴, Takumi Kihara⁶, Ryosuke Kainuma⁵, Takeshi Kanomata^{2

7}

Affiliations

¹ Department of Materials Science, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan. xu@material.tohoku.ac.jp.
² Faculty of Engineering, Tohoku Gakuin University, Tagajo 985-8537, Japan.
³ Faculty of Science and Technology, Ryukoku University, Otsu 520-2194, Japan.
⁴ Graduate School of Science and Engineering, Yamagata University, Yonezawa 992-8510, Japan.
⁵ Department of Materials Science, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan.
⁶ Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.
⁷ Research Institute for Engineering and Technology, Tohoku Gakuin University, Tagajo 985-8537, Japan.

Abstract

The magnetization, electric resistivity, and magnetoresistance properties of Pd 2 Mn 1 . 4 Sn 0 . 6 Heusler alloys were investigated. The Curie temperature of the parent phase, martensitic transformation temperatures, and magnetic field dependence of the martensitic transformation temperatures were determined. The magnetoresistance was investigated from 10 to 290 K, revealing both intrinsic and extrinsic magnetoresistance properties for this alloy. A maximum of about - 3 . 5 % of intrinsic magnetoresistance under 90 kOe and of about - 30 % of extrinsic magnetoresistance under 180 kOe were obtained. Moreover, the thermal transformation arrest phenomenon was confirmed in the Pd 2 Mn 1 . 4 Sn 0 . 6 alloy, and an abnormal heating-induced martensitic transformation (HIMT) behavior was observed.

Keywords: Heusler alloy; Pd–Mn–Sn; electric resistivity; magnetoresistance; martensitic transformation; thermal transformation arrest.