Effect of Co substitution on the magnetic and transport properties of the half-metallic ferrimagnet Mn2VGa

Kumar, K. Ramesh; Chelvane, J. Arout; Markandeyulu, G.; Malik, S.K.; Kumar, Naveen

doi:10.1016/j.ssc.2009.10.003

Cited by 26 publications

(13 citation statements)

References 23 publications

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“…The moment found on the C/D sites is small as is the moment 0.3 μ B on the Ni atoms in the C/D sites of Ni 2 MnGa. Slightly larger moments per formula unit of ≈1.9 μ B have been reported in Mn 2 VAl [15] and Mn 2 VGa [16] and a much larger value of 4.2 μ B in Mn 2 NiSb [17]. None of these systems are reported to have a structural phase transition.…”

Section: Discussionmentioning

confidence: 96%

Atomic and magnetic order in the shape memory alloy Mn₂NiGa

Brown

Kanomata

Neumann

et al. 2010

J. Phys.: Condens. Matter

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Magnetization and high resolution neutron powder diffraction measurements on the magnetic shape memory alloy Mn(2)NiGa have confirmed that it is ferromagnetic with a Curie temperature above 500 K. The compound undergoes a broad structural phase transformation ΔT ∼ 90 K with a mean transition temperature T(M) ∼ 270 K. The high temperature parent phase is cubic (a = 5.937 Å) and has a modified L 2(1) structure. At 500 K the ordered magnetic moment essentially all on the 4a site is 1.35 μ(B)/Mn. The low temperature martensite has space group I4/mmm and is related to the cubic phase through a Bain transformation a(tet) = (a(cub) + b(cub))/2, b(tet) = (a(cub) - b(cub)) and c(tet) = c(cub) in which the change in cell volume is < 2.6%. In this structure at 5 K the ordered moment of ≈2.3 μ(B) is again found to be confined to the sites with full Mn occupation and is aligned parallel to c. Neutron diffraction patterns obtained at 5 K suggested the presence of a weak incommensurate antiferromagnetic phase characterized by either a ((1/3)0(1/3)) or (00(1/3)) propagation vector.

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Section: Discussionmentioning

confidence: 96%

Atomic and magnetic order in the shape memory alloy Mn₂NiGa

Brown

Kanomata

Neumann

et al. 2010

J. Phys.: Condens. Matter

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“…x Co x VGa (x = 0.5; 0.75; 1), вплоть до 171 К для MnCoVGa [13]. В рамках приближения среднего поля было обнаружено, что антиферромагнитная связь Mn-V является наиболее сильным взаимодействием и вносит больший вклад в температуру Кюри, чем ферромагнитные связи Mn-Mn и V-V [14].…”

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STRUCTURAL, ELECTRONIC AND MAGNETIC PROPERTIES OF VANADIUM DOPED Mn2CoZ(Al/Ga)

Abuova¹,

Inerbaev²,

Abuova³

et al. 2021

SPM

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“…Experimentally, the resistivity of CoMnVAl [? ] and CoMnVGa [42] dependent temperature curves show kink behaviors around 200 K and 235 K, respectively. Above these kink points, small negative temperature coefficients of resistance were observed.…”

Section: Electronic Structurementioning

confidence: 97%

“…This atomic configuration gives rise of non-zero magnetic moment. For nominal CoMnVGa bulk sample, [42] the experimental atomic percent of Co, Mn, V and Ga are 25.7%, 26.5%, 20.7% and 26.9%, respectively. The atomic ratio is not equal any more.…”

Section: Origin Of Vanished Magnetism In Comnval/gamentioning

confidence: 98%

Density functional theory investigation on lattice dynamics, elastic properties and origin of vanished magnetism in Heusler compounds CoMnVZ (Z = Al, Ga)*

Li¹,

Liu²,

Liu³

et al. 2021

Chinese Phys. B

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The lattice dynamics, elastic properties and the origin of vanished magnetism in equiatomic quaternary Heusler compounds CoMnVZ (Z = Al, Ga) are investigated by first principle calculations in this work. Due to the similar constituent atoms in CoMnVAl and CoMnVGa compounds, they are both stable in LiMgPdSn-type structure with comparable lattice size, phonon dispersions and electronic structures. Comparatively, we find that CoMnVAl is more structurally stable than CoMnVGa. Meanwhile, the increased covalent bonding component in CoMnVAl enhances its mechanical strength and Vickers hardness, which leads to better comprehensive mechanical properties than those of CoMnVGa. Practically and importantly, structural and chemical compatibilities at the interface make non-magnetic semiconductor CoMnVAl and magnetic topological semimetals Co2MnAl/Ga more suitable to be grown in heterostructures. Owing to atomic preferential occupation in CoMnVAl/Ga, the localized atoms Mn occupy C (0.5, 0.5, 0.5) Wyckoff site rather than B (0.25, 0.25, 0.25) and D (0.75, 0.75, 0.75) Wyckoff sites in LiMgPdSn-type structure, which results in symmetric band filling and consequently drives them to be non-magnetic. Correspondingly, by tuning localized atoms Mn to occupy B (0.25, 0.25, 0.25) or/and D (0.75, 0.75, 0.75) Wyckoff sites in off-stoichiometric Co–Mn–V–Al/Ga compounds and keeping the total valence electrons as 24, newly compensated ferrimagnetic compounds are theoretically achieved. We hope that our work will provide more choices for spintronic applications.

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Effect of Co substitution on the magnetic and transport properties of the half-metallic ferrimagnet Mn2VGa

Cited by 26 publications

References 23 publications

Atomic and magnetic order in the shape memory alloy Mn₂NiGa

Atomic and magnetic order in the shape memory alloy Mn₂NiGa

STRUCTURAL, ELECTRONIC AND MAGNETIC PROPERTIES OF VANADIUM DOPED Mn2CoZ(Al/Ga)

Density functional theory investigation on lattice dynamics, elastic properties and origin of vanished magnetism in Heusler compounds CoMnVZ (Z = Al, Ga)*

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Effect of Co substitution on the magnetic and transport properties of the half-metallic ferrimagnet Mn2VGa

Cited by 26 publications

References 23 publications

Atomic and magnetic order in the shape memory alloy Mn2NiGa

Atomic and magnetic order in the shape memory alloy Mn2NiGa

STRUCTURAL, ELECTRONIC AND MAGNETIC PROPERTIES OF VANADIUM DOPED Mn2CoZ(Al/Ga)

Density functional theory investigation on lattice dynamics, elastic properties and origin of vanished magnetism in Heusler compounds CoMnVZ (Z = Al, Ga)*

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Atomic and magnetic order in the shape memory alloy Mn₂NiGa

Atomic and magnetic order in the shape memory alloy Mn₂NiGa