The Critical Behaviour and Magnetism of MnCoGe0.97Al0.03 Compounds

Abdul Rashid Abdul Rahman; Muhamad Faiz Md Din; Norinsan Kamil Othman; Jianli Wang; Nur Sabrina Suhaimi; Shi Xue Dou; Noor Fadzilah Mohamed Sharif; Nazrul Fariq Makmor

doi:10.3390/cryst12020205

Crystals (Jan 2022)

The Critical Behaviour and Magnetism of MnCoGe0.97Al0.03 Compounds

Abdul Rashid Abdul Rahman,
Muhamad Faiz Md Din,
Norinsan Kamil Othman,
Jianli Wang,
Nur Sabrina Suhaimi,
Shi Xue Dou,
Noor Fadzilah Mohamed Sharif,
Nazrul Fariq Makmor

Affiliations

Abdul Rashid Abdul Rahman: Department of Electrical & Electronic Engineering, Faculty of Engineering, National Defence University of Malaysia, Kuala Lumpur 57000, Malaysia
Muhamad Faiz Md Din: Department of Electrical & Electronic Engineering, Faculty of Engineering, National Defence University of Malaysia, Kuala Lumpur 57000, Malaysia
Norinsan Kamil Othman: Department of Applied Physics, Faculty of Science and Technology, The National University of Malaysia, 43600 UKM, Bangi 43600, Malaysia
Jianli Wang: Institute for Superconductivity and Electronic Materials, University of Wollongong, Wollongong, NSW 2522, Australia
Nur Sabrina Suhaimi: Department of Electrical & Electronic Engineering, Faculty of Engineering, National Defence University of Malaysia, Kuala Lumpur 57000, Malaysia
Shi Xue Dou: Institute for Superconductivity and Electronic Materials, University of Wollongong, Wollongong, NSW 2522, Australia
Noor Fadzilah Mohamed Sharif: Department of Electrical & Electronic Engineering, Faculty of Engineering, National Defence University of Malaysia, Kuala Lumpur 57000, Malaysia
Nazrul Fariq Makmor: Department of Electrical & Electronic Engineering, Faculty of Engineering, National Defence University of Malaysia, Kuala Lumpur 57000, Malaysia

DOI: https://doi.org/10.3390/cryst12020205
Journal volume & issue: Vol. 12, no. 2
p. 205

Abstract

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The critical behaviour associated with the field-induced martensitic transformation heavily relies on the vacancy and transition of the magnetic phase in MnCoGe based-compounds. Due to this revelation, an intensive investigation was brought forth to study the substitution of Ge (atomic radius = 1.23 Å) by Al (atomic radius = 1.43 Å) in MnCoGe0.97Al0.03 alloy compound. The room-temperature X-ray diffraction indicated that the reflections were identified with the orthorhombic structure (TiNiSi-type, space group Pnma) and minor hexagonal structure (Ni2In-type, space group P63/mmc). The substitution of Al in the supersession of Ge transmuted the crystal structure from TiNiSi-type to Ni2In-type structure. The MnCoGe0.97Al0.03 compound’s magnetism was driven by interactions that are long in range, as indicated by the study of the critical behaviour in the proximity of TC. The magnetic measurement and neutron diffraction revealed that the structural transition took place with the decrease in temperature. The results from neutron diffraction signify that the transformation of the magnetic field-induced martensitic has a crucial function in producing the immense effect of magnetocaloric systems such as these. This outcome serves a critical function for investigations in the future.

Published in Crystals

ISSN: 2073-4352 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry: Crystallography
Website: http://www.mdpi.com/journal/crystals/

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