Unusual perpendicular anisotropy in Co<sub>2</sub>TiSi films

Jin, Yunlong; Valloppilly, Shah R.; Kharel, Parashu; Pathak, Rohit; Kashyap, Arti; Skomski, Ralph; Sellmyer, David J.

doi:10.1088/1361-6463/aae80f

Cited by 4 publications

(1 citation statement)

References 41 publications

(60 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Meanwhile, magnetic tunnel junctions (MTJs) with PMA are beneficial for obtaining sufficiently high thermal stability and low critical switching current in nonvolatile magnetic random-access memories. As a result, much effort has been invested to investigate the PMA of 2D intrinsic ferromagnets, heterostructures, and MTJs. − As known, lower Curie temperatures of monolayer CrI 3 and bilayer Cr 2 Ge 2 Te 6 limit their application in high-density magnetic storage and spintronic devices. Hence, it is desirable to search for 2D intrinsic ferromagnets with high Curie temperature.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Novel 2D Intrinsic Ferromagnetic Materials with High Curie Temperature and Large Perpendicular Magnetic Anisotropy

2020

View full text Add to dashboard Cite

Two-dimensional intrinsic ferromagnets with high Curie temperature and large perpendicular magnetic anisotropy (PMA) are promising candidates for data storage and spintronics applications. In this work, first-principle calculations and Monte Carlo simulation are used to investigate the stability, electronic structure, and magnetic anisotropy of monolayers of CrSeX (X = Cl, Br, I). It is found that monolayer CrSeX (X = Cl, Br, I) species are two-dimensional intrinsic ferromagnets and are thermally stable at room temperature. It is worth noting that the Curie temperatures of monolayer CrSeX (X = Cl, Br, I) can reach or even exceed room temperature, and a strong PMA can be obtained in monolayer CrSeI. Interestingly, the PMA of monolayer CrSeI is mainly provided by the nonmetallic I atom with large spin–orbit coupling and magnetic anisotropy of the nonmetallic I atom reaching up to 0.572 meV/I atom, which is comparable to that of metallic Fe atoms at Fe/MgO interfaces. In contrast to monolayer CrSeI, monolayer CrSeCl and CrSeBr possess weak in-plane magnetic anisotropy, and their easily magnetized direction is the [100] axis. By analyzing the projected density of states and the p-orbital-resolved magnetic anisotropy energy of the nonmetallic I atom based on second-order perturbation theory, we find that the large PMA of monolayer CrSeI is mainly provided by the matrix element difference between the spin-up p x and p y states of the nonmetallic I atoms, and the difference between it and the matrix element difference between the spin-up p y and p z states of the nonmetallic I atoms in the case of the magnetic moment aligning [100] and [010] axes is the reason why the energy of monolayer CrSeI for the magnetic moment aligning [100] axis is smaller than the energy for the magnetic moment aligning [010] axis. This study suggests that monolayer CrSeI is a promising candidate for future applications in spintronic devices.

show abstract

Section: Introductionmentioning

confidence: 99%

Prediction of Novel 2D Intrinsic Ferromagnetic Materials with High Curie Temperature and Large Perpendicular Magnetic Anisotropy

2020

View full text Add to dashboard Cite

show abstract

Growth, magnetic, transport and electronic properties of Co2TiSi Heusler alloy thin films

Biswas,

Islam,

Kander

et al. 2023

Journal of Alloys and Compounds

View full text Add to dashboard Cite

Structural, electronic, and magnetic properties of CoFeVGe-based compounds: Experiment and theory

et al. 2023

View full text Add to dashboard Cite

We have carried out a combined theoretical and experimental investigation of both stoichiometric and nonstoichiometric CoFeVGe alloys. In particular, we have investigated CoFeVGe, Co1.25Fe0.75VGe, Co0.75Fe1.25VGe, and CoFe0.75VGe bulk alloys. Our first principles calculations suggest that all four alloys show ferromagnetic order, where CoFeVGe, Co1.25Fe0.75VGe, and Co0.75Fe1.25VGe are highly spin polarized with spin polarization values of over 80%. However, the spin polarization value of CoFe0.75VGe is only about 60%. We have synthesized all four samples using arc melting and high-vacuum annealing at 600 °C for 48 hours. The room temperature x-ray diffraction of these samples exhibits a cubic crystal structure with disorder. All the samples show single magnetic transitions at their Curie temperatures, where the Curie temperature and high field (3T) magnetization are 288 K and 42 emu/g; 305 K and 1.5 emu/g; 238 K and 39 emu/g; and 306 K and 35 emu/g for CoFeVGe, Co1.25Fe0.75VGe, Co0.75Fe1.25VGe, and CoFe0.75VGe, respectively.

show abstract

Unusual perpendicular anisotropy in Co₂TiSi films

Cited by 4 publications

References 41 publications

Prediction of Novel 2D Intrinsic Ferromagnetic Materials with High Curie Temperature and Large Perpendicular Magnetic Anisotropy

Prediction of Novel 2D Intrinsic Ferromagnetic Materials with High Curie Temperature and Large Perpendicular Magnetic Anisotropy

Growth, magnetic, transport and electronic properties of Co2TiSi Heusler alloy thin films

Structural, electronic, and magnetic properties of CoFeVGe-based compounds: Experiment and theory

Contact Info

Product

Resources

About

Unusual perpendicular anisotropy in Co2TiSi films

Cited by 4 publications

References 41 publications

Prediction of Novel 2D Intrinsic Ferromagnetic Materials with High Curie Temperature and Large Perpendicular Magnetic Anisotropy

Prediction of Novel 2D Intrinsic Ferromagnetic Materials with High Curie Temperature and Large Perpendicular Magnetic Anisotropy

Growth, magnetic, transport and electronic properties of Co2TiSi Heusler alloy thin films

Structural, electronic, and magnetic properties of CoFeVGe-based compounds: Experiment and theory

Contact Info

Product

Resources

About

Unusual perpendicular anisotropy in Co₂TiSi films