Ferromagnetic TM₂BC (TM = Cr, Mn) monolayers for spintronic devices with high Curie temperature

Abstract

Transition metal boro-carbide (TM2BC) structures crystalize in the layered orthorhombic structure in their bulk phases. In this study, however, we find that TM2BC (TM = Cr, Mn) prefer tetragonal (t)...

Monolayer gadolinium halides, GdX2 (X = F, Cl, Br): intrinsic ferrovalley materials with spontaneous spin and valley polarizations

“…2(d–f) which shows the dependence of the MAE on both in-plane polar angle φ ∈ [0°, 360°) and out-of-plane azimuthal angle θ . For systems with high symmetry, the MAE complies with the following expression 53,54 MAE( θ ) = K 1 sin 2 θ + K 2 sin 4 θ where K 1 and K 2 are the anisotropy constants. It is noted that the MAE is independent of the polar angle φ .…”

Effects of the Hubbard U correction on the electronic and magnetic properties of the tetragonal V2P2 sheet

“…10 Moreover, a series of TM 2 BC in bulk and monolayer forms have been shown to exhibit metallic properties with potential applications for superconducting, ceramic, and high T c ferromagnetic spintronics. [11][12][13][14] It should be noted that these reported MnX (X ¼ As, P), Ti 2 BN and Ti 2 BC materials have similar MBene building blocks in 2D and bulk forms. Therefore, it will be interesting to extend the search to other new 2D materials (similar to MBene).…”

“…19,20 In a similar tetragonal phase, a T C high above ambient temperature was observed with a considerable MAE for TM 2 BC (TM ¼ Cr, Mn) sheets. 14 These high T N and T C , potentials for 2D tetragonal structures mentioned above 14,19,20 prompted us to investigate the t-V 2 P 2 sheet through a correct choice of computational method and symmetry.…”

“…However, previous reports have shown that most MBene and related structures prefer the tetragonal phase as the ground state. 14,22 We are also aware that isotropic 2D materials which consist of TM atoms are among the most promising candidates for spintronics application. [22][23][24] It is known that the spin-polarized DFT 15 within the framework of generalized-gradient approximations (GGA) for the exchange-correlation (xc) functional fail to provide reasonable results for the transition metal (TM) systems.…”

Layer-dependent magnetic phase diagram in FenGeTe2 (3≤n≤7) ultrathin films: coexistence of localized and itinerant electronic states of Fe with variable valence

“…10 The reported metallic ferromagnets, such as Cr2BC, FeSe2, FeTe, MnSe and FenGeTe2, shown robust ferromagnetism with higher TC (130846 K). 11,12,13,14,15,16,17,18,19 Especially, 2D metallic Fe-Ge-Te ternary compounds (FGT) with high TC and huge MAE along the c axis have attracted attention. Among the FGT thin films, 2D Fe3GeTe2 was first achieved by cleaving Fe3GeTe2 bulk crystal onto a gold film evaporated on top of SiO2/Si substrate.…”