Magnetic properties of doped Mn-Ga alloys made by mechanical milling and heat treatment | Zendy

Daniel R. Brown | Zendy; Ke Han | Zendy; Theo Siegrist | Zendy; Tiglet Besara | Zendy; Rongmei Niu | Zendy

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Magnetic properties of doped Mn-Ga alloys made by mechanical milling and heat treatment

Author(s) -

Daniel R. Brown,

Ke Han,

Theo Siegrist,

Tiglet Besara,

Rongmei Niu

Publication year - 2016

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4943931

Subject(s) - materials science , coercivity , remanence , ternary operation , metallurgy , alloy , doping , magnet , rare earth element , magnetization , rare earth , analytical chemistry (journal) , condensed matter physics , magnetic field , chemistry , optoelectronics , physics , chromatography , quantum mechanics , computer science , programming language

Mn-Ga alloys have shown hard magnetic properties, even though these alloys contain no rare-earth metals. However, much work is needed before rare-earth magnets can be replaced. We have examined the magnetic properties of bulk alloys made with partial replacement of both the Mn and Ga elements in the Mn0.8Ga0.2 system. Bulk samples of Mn-Ga-Bi, Mn-Ga-Al, Mn-Fe-Ga and Mn-(FeB)-Ga alloys were fabricated and studied using mechanically milling and heat treatments while altering the atomic percentage of the third element between 2.5 and 20 at%. The ternary alloy exhibits all hard magnetic properties at room temperature with large coercivity. Annealed Mn-Ga-X bulk composites exhibit high coercivities up to 16.6 kOe and remanence up to 9.8 emu/g, that is increased by 115% over the binary system

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