Tuning of the magneto-caloric effects in Ni43Mn46In11magnetic shape memory alloys by substitution of boron

Senem Saritaş; Mert Miraç Çiçek; Eyup Kavak; Kubra Gurpinar; Oğuz Yildirim; Suheyla Yuce; Orhan Atakol; Baris Emre

doi:10.1088/1361-648X/ad0a13

Tuning of the magneto-caloric effects in Ni₄₃Mn₄₆In₁₁magnetic shape memory alloys by substitution of boron

J Phys Condens Matter. 2023 Nov 15;36(7). doi: 10.1088/1361-648X/ad0a13.

Authors

Senem Saritaş¹, Mert Miraç Çiçek^{1

2}, Eyup Kavak¹, Kubra Gurpinar³, Oğuz Yildirim⁴, Suheyla Yuce⁵, Orhan Atakol³, Baris Emre¹

Affiliations

¹ Faculty of Engineering, Department of Engineering Physics, Ankara University, 06100 Beşevler, Ankara, Turkey.
² REHIS LTCC and Thin Film Department, Aselsan Inc., Ankara 06830, Turkey.
³ Department of Chemistry, Faculty of Science, Ankara University, Ankara 06100, Turkey.
⁴ Empa-Swiss Federal Laboratories for Material Science and Technology, CH, 8600 Dübendorf, Switzerland.
⁵ Department of Physics, Science and Literature Faculty, Ondokuz Mayis University, Kurupelit, 55139 Samsun, Turkey.

PMID: 37931322
DOI: 10.1088/1361-648X/ad0a13

Abstract

In this study, we report the structural, magnetic, and magnetocaloric properties of B substitution on the Mn site in Ni₄₃Mn_46-xB_xIn₁₁(x= 0.5, 1.0) Heusler alloys. Crystal structure analysis using room-temperature x-ray diffraction data reveals both samples have mixed phases composed of cubic and tetragonal phases. The structural and magnetic phase transition characteristic temperatures are determined using differential scanning calorimetry, isothermal magnetization (MT), and isofield magnetization (MH) measurements. Both alloys exhibit inverse and direct magnetocaloric effects in the vicinity of their magnetostructural transition and Curie temperature (T_C), respectively. For Ni₄₃Mn_45.0B_1.0In₁₁a maximum magnetic entropy change of 25.06 J kg^-1K^-1is observed at 250 K for a magnetic field change of 5 T.

Keywords: Heusler alloys; inverse magnetocaloric effect; magnetic shape memory alloys; magnetocaloric effect; martensitic transformation.

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