A theoretical and experimental investigation on the structure and magnetic properties of Mn2CrGa

Zhang, H.G.; Chen, J.; Liu, E.K.; Yue, Ming; Liu, G.D.; Lu, Qingmei; Wang, W.H.; Wu, Guangheng

doi:10.1016/j.intermet.2018.12.012

Cited by 3 publications

(4 citation statements)

References 33 publications

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“…This tetragonal phase is different from the tetrag-017102-3 onal Heusler structure, which has a space group I4/mmm or I 4m2. [41] The ratio of Co 1.9 V 3.1 -type tetragonal phase in the XRD pattern for x = 32 increases compared with x = 30. Further increasing x to 34, except for the tetragonal phase, the peak intensity of fcc weakens greatly and the peaks of the bcc structure appear.…”

Section: Resultsmentioning

confidence: 93%

Formation of quaternary all-d-metal Heusler alloy by Co doping fcc type Ni₂MnV and mechanical grinding induced B2-fcc transformation

Lu¹,

Zhang²,

Wang³

et al. 2023

Chinese Phys. B

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The structure of the all-d-metal alloy Ni50-x Co x Mn25V25 (x = 0-50) was investigated by theoretical and experimental methods. The first-principles calculations indicate that the most stable structure of Ni2MnV alloy is face-centered cubic (fcc) type structure with ferrimagnetic state and the equilibrium lattice constant is 3.60 Å, which is in agreement with the experimental result. It is remarkable that replacing partial Ni with Co can turn the alloy from fcc structure to B2-type Heusler structure as Co content x > 37 by using melting spinning method, implying that the d-d hybridization between Co/Mn elements and low-valent elements V stabilizes the Heusler structure. The Curie temperature T C of all-d-metal Heuser alloy Ni50-x Co x Mn25V25 (x > 37) increases almost linearly with the increase of Co due to that the interaction of Co-Mn is stronger than Ni-Mn. A magnetic transition from ferromagnetic state to weak magnetic state accompanying with grinding stress induced transformation from B2 to the dual-phase of B2 and fcc has been observed in these all-d-metal Heusler alloys. This phase transformation and magnetic change provide a guide to overcome the brittleness and make the all-d-metal Heusler alloy interesting in stress and magnetic driving structural transition.

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Section: Resultsmentioning

confidence: 93%

Formation of quaternary all-d-metal Heusler alloy by Co doping fcc type Ni₂MnV and mechanical grinding induced B2-fcc transformation

Lu¹,

Zhang²,

Wang³

et al. 2023

Chinese Phys. B

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“…for x = 1) may extend the tuning range of T M . We choose and alloy Mn-Ru-Ga with V be-cause Mn 2 VGa was known to be a cubic Heusler with a high Curie temperature of 783 K. [43] In contrast, since Mn 2 CrGa does not crystallize into cubic structure, [42] and there is, to the best of our knowledge, no experimental report on Mn 2 TiGa, alloying with Cr and Ti may not be as favorable as V in terms of phase stability. By fixing the Ru concentration at x = 0.75, we systematically investigate Mn 2 Ru 0.75 V y Ga and Mn 2.25−y Ru 0.75 V y Ga quaternary systems.…”

Section: Structural Characterizationsmentioning

confidence: 99%

Tailoring-compensated ferrimagnetic state and anomalous Hall effect in quaternary Mn–Ru–V–Ga Heusler compounds

Liang 梁,

Xi 郗,

Wang 王

et al. 2024

Chinese Phys. B

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Cubic Mn2Ru x Ga Heusler compound is a typical example of compensated ferrimagnet with attractive potential for high-density, ultrafast, and low-power spintronic applications. In the form of epitaxial thin films, Mn2Ru x Ga was shown to exhibit high spin polarization and high tunability of compensation temperature by freely varying the Ru content x over a broad range (0.3 < x < 1.0). Here, we systematically studied Mn-Ru-Ga-based polycrystalline bulk buttons prepared by arc melting and found that, in equilibrium bulk form, the cubic structure is unstable when x < 0.75. To overcome this limitation, we alloyed Mn-Ru-Ga with a fourth element V. By adjusting the content of V in the Mn2Ru0.75V y Ga and Mn2.25-y Ru0.75V y Ga quaternary systems, the magnetic compensation temperature was regulated. Compensation was achieved near 300 K which was confirmed by both the magnetic and anomalous Hall effect measurements. Analyses of the anomalous Hall effect scaling in quaternary Mn-Ru-V-Ga alloys revealed the dominant role of skew scattering, notably that contributed by the thermally excited phonons, in contrast to many other 3d ferromagnets and Heusler compounds. We further showed that the Ga antisites and V content can simultaneously control the residual resistivity ratio (RRR) as well as the relative phonon and defect contribution to the anomalous Hall effect a’’/a’ in Mn-Ru-V-Ga, leading to a scaling relation a’’/a’ ∝ RRR1.8.

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“…However, Wei et al [18] found that the metallic character of Fe 2 NiTe alloy originates from the contribution of Fe-and Ni 3d states around the Fermi level. Although, Zhang et al [19] and Wei [20] found that a pseudogap occurs below the Fermi level for minority-spin states and the Fermi level gradually moves from the shoulder of minority-spin states to the pseudogap [20].…”

Section: Introductionmentioning

confidence: 98%

“…Several researchers have found that some full-Heusler alloys are not half-metals, but they exhibit a metallic character due to the metallic nature of their spinpolarized electronic structures [16][17][18][19][20]. The Rh 2 FeAl [16] * corresponding author; e-mail: mabrekmoued22@gmail.com and Fe 2 NiZ (Z = Al, Ga, In) [17] full-Heusler alloys revealed metallic nature because the valence and the conduction bands dominate the Fermi level for two spins channels.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Investigation of Electronic Structures, Elastic, and Magnetic Properties of Rh₂CrGe Full-Heusler Alloy

et al. 2019

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In this paper, we have investigated the structural, elastic, electronic, and magnetic properties of Rh2CrGe full-Heusler alloy in the regular type (Cu2MnAl, prototype L21) phase by using the first-principle methods of density functional theory with local spin-density approximation. We have found that Rh2CrGe is stable in the ferromagnetic configuration. This result is confirmed by the calculated cohesive energies. The stability criteria show that Rh2CrGe is mechanically stable in L21 structure. The spin-polarized electronic structures depicted a metallic character. The calculated total magnetic moment of 3.78 µB is not in agreement to the value of 4 µB of the Slater-Pauling rule. Therefore the Rh2CrGe full-Heusler alloy is metallic ferromagnet in nature.

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A theoretical and experimental investigation on the structure and magnetic properties of Mn2CrGa

Cited by 3 publications

References 33 publications

Formation of quaternary all-d-metal Heusler alloy by Co doping fcc type Ni₂MnV and mechanical grinding induced B2-fcc transformation

Formation of quaternary all-d-metal Heusler alloy by Co doping fcc type Ni₂MnV and mechanical grinding induced B2-fcc transformation

Tailoring-compensated ferrimagnetic state and anomalous Hall effect in quaternary Mn–Ru–V–Ga Heusler compounds

Theoretical Investigation of Electronic Structures, Elastic, and Magnetic Properties of Rh₂CrGe Full-Heusler Alloy

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A theoretical and experimental investigation on the structure and magnetic properties of Mn2CrGa

Cited by 3 publications

References 33 publications

Formation of quaternary all-d-metal Heusler alloy by Co doping fcc type Ni2MnV and mechanical grinding induced B2-fcc transformation

Formation of quaternary all-d-metal Heusler alloy by Co doping fcc type Ni2MnV and mechanical grinding induced B2-fcc transformation

Tailoring-compensated ferrimagnetic state and anomalous Hall effect in quaternary Mn–Ru–V–Ga Heusler compounds

Theoretical Investigation of Electronic Structures, Elastic, and Magnetic Properties of Rh2CrGe Full-Heusler Alloy

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Formation of quaternary all-d-metal Heusler alloy by Co doping fcc type Ni₂MnV and mechanical grinding induced B2-fcc transformation

Formation of quaternary all-d-metal Heusler alloy by Co doping fcc type Ni₂MnV and mechanical grinding induced B2-fcc transformation

Theoretical Investigation of Electronic Structures, Elastic, and Magnetic Properties of Rh₂CrGe Full-Heusler Alloy