Phase transitions and magnetic properties of Cu and Fe doped Ni2Mn0.55Cu0.35Fe0.10Ga Heusler alloy
Year: 2025
Type: article
Abstract: The phase transitions and associated magnetic properties of Ni2Mn0.55Cu0.35Fe0.10Ga have been studied by dc magnetization and electrical resistivity measurements. A tetragonal crystal structure was identified at room temperature by powder x-ray diffraction measurements. The temperature dependence of magnetization data obtained while heating revealed two distinct transitions at 338 K and 368 K. On cooling the transitions were observed at 334 K and 355 K. The lower temperature transition showed a thermal hysteresis of ≈4 K, while the higher temperature transition exhibited a thermal hysteresis of ≈13 K. The temperature dependence of the electrical resistivity and isothermal entropy changes obtained data indicated that the transition at 338 K is a second order transition while the one at 368 K is a first order phase transition. For a field change of 5 T, a maximum entropy change of −3.5 J kg−1 K−1 has been observed. The experimental data showed that for both heating and cooling the martensitic phase transition occurred in a paramagnetic state in Ni2Mn0.55Cu0.35Fe0.10Ga.
Source: AIP Advances
DOI: 10.1063/9.0000943
Authors: Hauwa Adedo, Jemma R. DeFeo, Venkateswara Yenugonda, Sumaiya Rahman, Arjun K. Pathak, Mahmud Khan
Institutions: Miami University, Buffalo State University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,350
Funder: National Science Foundation
OpenAlex ID: W4408359578