Two-dimensional magneto-photoconductivity in non-van der Waals manganese selenide

Abstract

Deficient intrinsic species and suppressed Curie temperatures (Tc) in two-dimensional (2D) magnets are major barriers for future spintronic applications. As an alternative, delaminating non-van der Waals (vdW) magnets can offset...

Composition‐Dependent Magnetic Ordering in Freestanding 2D Non‐van der Waals Cr2TexSe3−x Crystals

“…Using mechanical exfoliation techniques, a series of 2D intrinsic magnetic materials have been synthesized, including CrX 3 (X = Cl, Br, I), CrGe(Si)Te 3 , CrSBr, CrPS 4 , and MPS 3 (M = Mn, Fe, Ni). [1][2][4][5][6][7][8][9][10] Based on first-principles calculations, hundreds of 2D vdW magnets have been predicted for breakthroughs to realize controlled synthesis of 1 and 2 unit-cell CrSe and Cr 2 Te 3 by CVD growth and found these 2D ultrathin films show obvious thickness-dependent Curie temperature, the highest value is 280 K. Xu et al [36] reported that hexagonal CrTe 2 monolayer grown on bilayer graphene substrates by MBE with T C = 200 K. Zhang et al [37] reported that trigonal ultrathin Cr 2 Te 3 films are FM with T C = 195 K and exhibit strong perpendicular magnetic anisotropy with 5 × 10 6 J m −3 , and Li et al [38] prepared 2D nanosheets of α-MnSe 2 with nonstoichiometric surfaces via soft chemical etching, which were found to be a FM semiconductor with T C = 320 K. In addition, the robust FM/AFM order have also been found in 2D non-vdW CrSe 2 , Fe 7 Se 8 , Cr 5 Te 8 , FeTe, CrTe, α-MnSe 2 , and FeSe ultrathin films, their T C is up to 110, 300, 160, 220, 367, 160, and 553 K, respectively. [27,28,31,[38][39][40][41] Compared to 2D vdW magnets, 2D non-vdW ultrathin films have strong interlayer chemical bonding.…”

“…[ 36 ] reported that hexagonal CrTe 2 monolayer grown on bilayer graphene substrates by MBE with T C = 200 K. Zhang et al. [ 37 ] reported that trigonal ultrathin Cr 2 Te 3 films are FM with T C = 195 K and exhibit strong perpendicular magnetic anisotropy with 5 × 10 6 J m −3 , and Li et al [ 38 ] prepared 2D nanosheets of α‐MnSe 2 with nonstoichiometric surfaces via soft chemical etching, which were found to be a FM semiconductor with T C = 320 K. In addition, the robust FM/AFM order have also been found in 2D non‐vdW CrSe 2 , Fe 7 Se 8 , Cr 5 Te 8 , FeTe, CrTe, α‐MnSe 2 , and FeSe ultrathin films, their T C is up to 110, 300, 160, 220, 367, 160, and 553 K, respectively. [ 27,28,31,38–41 ] Compared to 2D vdW magnets, 2D non‐vdW ultrathin films have strong interlayer chemical bonding.…”

Magnetic properties and promising magnetocaloric performances in the antiferromagnetic GdFe2Si2 compound

“…Magnetic materials with promising functional performances have attracted increasing research interests due to their own potential or practical applications in various industries and our daily life aspects [1][2][3][4][5][6][7][8][9][10]. The magnetocaloric (MC) effect-based solid-state magnetic refrigeration (MR) technology has been well recognized as an alternative technology to the presently used commercialized gas compression technology [5][6][7][8][9].…”

Enhanced magnetocaloric performances and tunable martensitic transformation in Ni35Co15Mn35−xFexTi15 all-d-metal Heusler alloys by chemical and physical pressures

“…In recent years, various magnetic materials with outstanding performances have been developed and attracted extensive research interest [1][2][3][4][5][6][7][8]. Among them, the solid-state magnetic cooling (MC) method based on the magnetocaloric effect (MCE) of magnetic solids has been recognized as one of the most potential promising environmentally friendly and high-efficiency alternative methods to the well-used state-of-the-art gas compression cooling technique [1][2][3].…”