Coupled Magnetic and Structural Transitions in Fe-Doped MnNiSi Compounds

Author

Li, Y. ; Wei, Z.Y. ; Liu, E.K. ; Liu, G.D. ; Luo, H.Z. ; Xi, X.K. ; Wang, W.H. ; Wu, G.H.

Author_Institution

Beijing Nat. Lab. for Condensed Matter Phys., Inst. of Phys., Beijing, China

Volume

51

Issue

11

fYear

2015

Firstpage

1

Lastpage

4

Abstract

In this paper, we obtained a ferromagnetic (FM) Mn_0.36Fe_0.6Ni_0.98Si compound in which magnetic and structural transitions are coupled together. By combining Fe doping and Mn depletion, the magnetostructural coupling was realized, with a magnetostructural transition happening at 337 K from paramagnetic hexagonal phase to FM orthorhombic phase. The magnetocaloric effect was measured across the transition, showing a wide temperature span and a zero magnetic hysteresis loss. The maximum values of magnetic entropy change and refrigeration capacity near reverse martensitic transition (~367 K) are -2.52 J kg^-1 K^-1 and 108 J kg^-1, respectively, under a field change of ΔH = 0 ~ 50 kOe.

Keywords

ferromagnetic-paramagnetic transitions; iron alloys; magnetic hysteresis; magnetocaloric effects; manganese alloys; martensitic transformations; nickel alloys; refrigeration; silicon alloys; Mn_0.36Fe_0.6Ni_0.98Si; coupled magnetic transition; ferromagnetic compound; magnetic entropy change; magnetic refrigeration; magnetocaloric effect; magnetostructural coupling; martensitic transition; paramagnetic hexagonal phase-FM orthorhombic phase magnetostructural transition; structural transition; zero magnetic hysteresis loss; Compounds; Cooling; Magnetic field measurement; Magnetic fields; Magnetic hysteresis; Magnetization; Temperature measurement; Magnetocaloric effect (MCE); MnNiSi; magnetocaloric effect; magnetostructural transition; magnetostructural transition (MST);

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2015.2438857

Filename

7115148