Electronic, magnetic, and structural properties of CrMnSb0.5Si0.5

Stuelke, Lukas; Margaryan, Lilit; Kharel, Parashu; Shand, Paul; Lukashev, Pavel

doi:10.1016/j.jmmm.2022.169267

Cited by 4 publications

(2 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here we show that while the electronic structure of NiFeMnAl indeed has SGSlike characteristics, this material is half-metallic in its ground state. At the same time, it may undergo a transition to an SGS state under negative pressure (expansion), which may, at least in principle, be achieved by atomic substitution [33,34]. The practical feasibility and thermodynamic stability of the considered compound is confirmed by synthesizing bulk samples of NiFeMnAl, as discussed in the experimental section of this work.…”

Section: Introductionmentioning

confidence: 70%

Electronic, magnetic, and structural properties of NiFeMnAl

Lukashev,

Wysong,

McFadden

et al. 2023

J. Phys.: Condens. Matter

Self Cite

View full text Add to dashboard Cite

Half-metallic Heusler compounds have been extensively studied in the recent years, both experimentally and theoretically, for potential applications in spin-based electronics. Here, we present the results of a combined theoretical and experimental study of the quaternary Heusler compound NiFeMnAl. Our calculations indicate that this material is half-metallic in the ground state and maintains its half-metallic electronic structure under a considerable range of external hydrostatic pressure and biaxial strain. NiFeMnAl crystallizes in the regular cubic Heusler structure, and exhibits ferromagnetic alignment. The practical feasibility of the proposed system is confirmed in the experimental section of this work. More specifically, a bulk ingot of NiFeMnAl was synthesized in A2 type disordered cubic structure using arc melting. It shows a high Curie temperature of about 468 K and a saturation magnetization of 2.3 μ B / f .u . The measured magnetization value is smaller than the one calculated for the ordered structure. This discrepancy is likely due to the A2 type atomic disorder, as demonstrated by our calculations. We hope that the presented results may be useful for researchers working on practical applications of spin-based electronics.

show abstract

Section: Introductionmentioning

confidence: 70%

Electronic, magnetic, and structural properties of NiFeMnAl

Lukashev,

Wysong,

McFadden

et al. 2023

J. Phys.: Condens. Matter

Self Cite

View full text Add to dashboard Cite

show abstract

“…The electronic band properties of Heusler alloys can be modified by external factors, such as mechanical strain and atomic substitution/doping [19][20][21][22][23][24][25][26]. In thin film structures, interface engineering has also been used to tune and restore half-metallic properties [27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Electronic, magnetic and structural properties of CoFeVAl and CoFeV_0.5Mn_0.5Al

Kharel,

Baker,

Wieberdink

et al. 2024

J. Phys. D: Appl. Phys.

Self Cite

View full text Add to dashboard Cite

In this study, we present results of a comprehensive computational and experimental study of CoFeVAl and CoFeV0.5Mn0.5Al Heusler alloys. It is shown that while CoFeVAl exhibits a fairly large degree of spin polarization, this material is not half-metallic due to the presence of the vanadium spin-down states at the Fermi level. However, replacing 50% of vanadium with manganese results in a nearly half-metallic transition, largely due to the shift of the Fermi level towards occupied states. Moreover, the half-metallicity of CoFeV0.5Mn0.5Al is rather robust in a wide range of considered mechanical strain and under experimentally observed B2-type atomic disorder, thus making this alloy potentially suitable for practical spintronic applications. Both considered alloys exhibit ferromagnetic alignment at larger lattice constants, aside from a relatively small magnetic moment of vanadium which is anti-aligned with the magnetic moments of Co, Fe and Mn. We have synthesized both CoFeVAl and CoFeV0.5Mn0.5Al alloys in cubic structure with some structural disorder using arc melting and annealing. The structural and magnetic properties of the synthesized CoFeV0.5Mn0.5Al alloy are in good agreement with the theoretical calculations but vary slightly from the parent compound.

show abstract