Magnetic Properties of Mn-Ga Alloys with a High Coercive Force

Tsuboya, Ichiro; Sugihara, Makoto

doi:10.1143/jpsj.20.170

Cited by 16 publications

(4 citation statements)

References 3 publications

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“…(0, 0, 0) and (1/2, 1/2, 0) sites [12,13]. The saturation magentisation therefore decreases with increasing Mn content [9]. An anisotropy constant K 1 of about 1.4 MJ m À 3 was measured for the composition Mn 54.5 Ga 45.5 but the coercivity (H c ) of the melt spun ribbons was only 0.1 T [10].…”

Section: Introductionmentioning

confidence: 95%

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Formation and magnetic properties of the L10 phase in bulk, powder and hot compacted Mn–Ga alloys

Mix

Müller

Schultz

et al. 2015

Journal of Magnetism and Magnetic Materials

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Section: Introductionmentioning

confidence: 95%

“…Depending on the composition, either the L1 0 (tP4; P4/mmm; AuCu) or D0 22 (tI8; I4/mmm; Al 2 Ti) tetragonal structures can be produced [6][7][8][9]. Note that in this paper, the tP4 description of the L1 0 phase will be used but that strictly, the unit cell of the L1 0 structure is tP2, P4/mmm, AuCu.…”

Section: Introductionmentioning

confidence: 99%

Formation and magnetic properties of the L10 phase in bulk, powder and hot compacted Mn–Ga alloys

Mix

Müller

Schultz

et al. 2015

Journal of Magnetism and Magnetic Materials

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“…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.%. 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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“…In the Mn-Ga binary system, there are many intermetallic compounds and especially, two compounds, MnGa-L1 0 and Mn 3 Ga-D0 22 , with ordered fct structures are known to exhibit a ferromagnetic or ferrimagnetic properties with high coercivity [8]. The L1 0 phase was first reported by Tsuboya and Sugihara to appear in the Mn composition ranging from 66 to 68.5 at.% [9]. On the other hand, the fct phase, actually corresponding to the D0 22 phase, was first mentioned by Zwicker to appear in 77.5 at.% Mn alloy annealed at 400°C after quenching from 850°C [10].…”

Section: Introductionmentioning

confidence: 99%