Martensitic Transformation Temperatures and Hall Effect in Ni47-xMn41+xIn12 (x = 0, 1, 2) Alloys

Vyacheslav V Marchenkov; Sabina M Emelyanova; Elena B Marchenkova

doi:10.3390/ma16020672

Martensitic Transformation Temperatures and Hall Effect in Ni_47-xMn_41+xIn₁₂ (x = 0, 1, 2) Alloys

Materials (Basel). 2023 Jan 10;16(2):672. doi: 10.3390/ma16020672.

Authors

Vyacheslav V Marchenkov¹, Sabina M Emelyanova¹, Elena B Marchenkova¹

Affiliation

¹ M.N. Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences, 620108 Ekaterinburg, Russia.

Abstract

At present, the question of the relationship between the characteristic martensitic transformation temperatures (MTT) and the electronic parameters of a system has not been fully studied. In the present work, an attempt to establish a similar relationship using the example of the concentration of charge carriers, n, was made. The field dependences of Hall resistivity ρ_H and magnetization M of the magnetocaloric Ni_47-xMn_41+xIn₁₂ (x = 0, 1, 2) alloys were measured at T = 4.2 K and in magnetic fields of up to 80 kOe. The MTT were obtained from the temperature dependences of electrical resistivity and magnetization. It was observed that the MTT correlate strongly with both the valence electron concentration e/a and the electronic transport characteristics, which are the coefficient of the normal (NHE) R₀ and anomalous (AHE) R_S Hall effect and the concentration of charge carriers n.

Keywords: Hall effect; Heusler alloys Ni-Mn-In; concentration of charge carriers n; magnetocaloric effect; valence electron concentration e/a.

Grants and funding

This work was supported by the state assignment of the Ministry of Science and High Education of the Russian Federation (theme “Spin” No. 122021000036-3).