Phase equilibria in the Mn-rich portion of Mn–Ga binary system

Minakuchi, Kazuhiro; Umetsu, Rie Y.; Ishida, K.; Kainuma, Ryosuke

doi:10.1016/j.jallcom.2012.04.065

Cited by 57 publications

(22 citation statements)

References 18 publications

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“…A Mn-Ga alloy with 20-40% Ga commonly consists of the D0 19 -type Mn 3 Ga phase because of its stability, and the formation of the D0 22 -type Mn 3 Ga phase requires a time-consuming process [21][22][23]. Although the D0 22 -type phase can be obtained by annealing a Mn-Ga alloy that includes the D0 19 -type phase at 750 K for a week [21], we determined the optimum condition for easily obtaining the D0 22 -type phase [17].…”

Section: Resultsmentioning

confidence: 99%

New hard magnetic phase in Mn–Ga–Al system alloys

Saito

Nishio–Hamane

2015

Journal of Alloys and Compounds

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Section: Resultsmentioning

confidence: 99%

New hard magnetic phase in Mn–Ga–Al system alloys

Saito

Nishio–Hamane

2015

Journal of Alloys and Compounds

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“…[1][2][3][4][5] Several intermetallic compounds exist in the Mn-Ga system alloy. Among these intermetallic compounds, L1 0 -MnGa and D0 22 -Mn 3 Ga have been intensively studied as promising candidates for rare-earth-free magnets. The L1 0 -MnGa intermetallic compound, which is also known as the AuCu-type MnGa phase, has a tetragonal structure (P4/mmm) and has been prepared in the form of film and powder.…”

Section: Introductionmentioning

confidence: 99%

“…[6][7][8][9][10][11] The D0 22 -Mn 3 Ga intermetallic compound, known as the Al 3 Ti-type MnGa phase, also has a tetragonal structure (I4/mmm). 12 Three different Mn 3 Ga intermetallic compounds are known to exits: the tetragonal D0 22 -Mn 3 Ga intermetallic compound, hexagonal D0 19 -Mn 3 Ga intermetallic compound, and cubic L2 1 -Mn 3 Ga intermetallic compound. 13 The tetragonal D0 22 -Mn 3 Ga intermetallic compound is not the most stable of these compounds.…”

Section: Introductionmentioning

confidence: 99%

High coercivity in Mn-Ga-Cu alloys

Saito

Nishio–Hamane

2016

AIP Advances

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Mn-Ga-Cu alloys were produced by melt-spinning and subsequent annealing. The coercivity of the Mn-Ga-Cu alloys was dependent on the Cu content and the annealing conditions. The coercivity of the Mn65Ga20Cu15 alloy annealed at 573 K for 10 h, iHc = 23.8 kOe, was comparable to that of rare-earth-based magnets. The hard magnetic phase of the Mn65Ga20Cu15 alloy was found to be fine D022-Mn3Ga grains, formed from the fcc phase during annealing.

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“…1,2 The L1 0 -ordered ferromagnetic Mn x Ga with 0.76≤x≤1.8 is of particular interests for its high magnetic performance. 3 The L1 0 -MnGa was first reported by Tsuboya and Sugihara to appear in the Mn composition ranging from 66 to 68.5 at.%.…”

Section: Introductionmentioning

confidence: 99%

“…4 It is interesting that the L1 0 -phase appears in two individual composition ranges of 65-68 at.% Mn and 58-61 at.%, respectively. 2 At the Ga-rich side of the binary phase diagram, the bcc ϕ-phase Mn-Ga lies in a very narrow homogeneity range around 77 at.% Ga. 1 The ϕ-phase is known to be ferromagnetic but the previous reports on its preparation and magnetic properties were much less than that of the L1 0-phase.…”

Section: Introductionmentioning

confidence: 99%

Structure and magnetic properties of L1-MnGa nanoparticles prepared using direct reactions between Mn nanoparticles and Ga

et al. 2018

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The tetragonal L10-Mn1+xGa (x<0.8) nanoparticles and bcc-Mn23Ga77 nanoparticles with large coercivity were prepared using direct reactions between Mn nanoparticles and Ga at elevated temperatures. The Mn23Ga77 phase was formed at ∼573 K while the L10-structured Mn1+xGa was formed at ∼850 K. After ball-milling, the L10-Mn1+xGa nanoparticles transformed into nano-flakes with enhanced coercivity. The size of the as-prepared Mn23Ga77 nanoparticles is comparable to that of the precursor Mn nanoparticles. An aggregation of the nanoparticles and thus a larger particle size were observed in the L10-Mn1+xGa nanoparticles obtained at 850 K. The size of the L10-Mn1+xGa nano-flakes is reduced to about 200-400 nm with a thickness of ∼20 nm. The coercivity of the Mn23Ga77 nanoparticles and the L10-Mn1+xGa nanoparticles at 300 K reached up to 0.2 T and 0.43 T, respectively. The coercivity of L10-Mn1+xGa ball-milled nano-flakes is 0.59 T at 300 K.

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Phase equilibria in the Mn-rich portion of Mn–Ga binary system

Cited by 57 publications

References 18 publications

New hard magnetic phase in Mn–Ga–Al system alloys

New hard magnetic phase in Mn–Ga–Al system alloys

High coercivity in Mn-Ga-Cu alloys

Structure and magnetic properties of L1-MnGa nanoparticles prepared using direct reactions between Mn nanoparticles and Ga

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