Preferred site occupation and magnetic properties of Ni-Fe-Ga-Co ferromagnetic shape memory alloys by first-principles calculations
Source abstract
Abstract
First-principles calculations have been used to investigate the effects of Co addition on the preferred site occupation and magnetic properties of Ni-Fe-Ga-Co ferromagnetic shape memory alloys. The formation energy results indicate that the excess Ni constituent preferentially occupies the Fe sites in the off-stoichiometric Ni-Fe-Ga ternary alloy. The added Co tends to take the normal-Ni sites in the Ni-Fe-Ga-Co quaternary alloy during composition adjustment process. The total magnetic moment increases with Co content of the Ni36-xFe12Ga16Cox (x=0, 1, 2, 3 and 4) alloys. The difference between the up and down electronic density of states at the Fermi level gives rise to the increased magnetic property.
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Research context
OpenAlex topics: Shape Memory Alloy Transformations · Magnetic Properties and Applications · Microstructure and Mechanical Properties of Steels
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Northeastern University 1 Key Laboratory for Anisotropy and Texture of Materials, , Shenyang 110819, China
Northeastern University at Qinhuangdao 2 School of Resources and Materials, , Qinhuangdao 066004, China
Hebei Provincial Laboratory for Dielectric and Electrolyte Functional Materials 3 , Qinhuangdao 066004, China
Funding
Fundamental Research Funds for the Central Univerites of Ministry of Education of China · National Natural Science Foundation of China · Natural Science Foundation of Hebei Province
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