Optical and magneto-optical properties of epitaxial Mn2GaC MAX phase thin film

Substitution Effects in Spin-Polarized (Cr4-xFex)0.5AC (A = Ge, Si, Al) MAX Phases

“…The growth of the binding and substitution energies during the gradual transition from chromium to iron demonstrates the complexity of iron substitution and explains the fact that the iron-containing MAX phases have not yet been obtained. For example, the Cr 2 GeC MAX phase was synthesized [9,20,21], while all attempts to obtain the Fe 2 GeC MAX phase failed. As can be seen (Figures 2c and S5), the lattices that are favorable with respect to energy are single-substituted like (Cr 3 Fe 1 ) 0.5 AC (A = Ge, Si, Al).…”

“…that the iron-containing MAX phases have not yet been obtained. For example, the Cr2GeC MAX phase was synthesized [9,20,21], while all attempts to obtain the Fe2GeC MAX phase failed. As can be seen (Figures 2c and S5), the lattices that are favorable with respect to energy are single-substituted like (Cr3Fe1)0.5AC (A = Ge, Si, Al).…”

“…The few magnetic MAX compounds that have been synthesized to date exhibit outstanding properties attractive for both fundamental research and advanced applications. The properties include complex magnetism in the bulk rare-earth (Mo 2/3 Re 1/3 ) 2 AlC i-MAX phases [16] and magnetic (Cr,Mn) 2 GaC thin films [17,18], as well as the large uniaxial magnetostriction in the nanolaminated Mn 2 GaC phase [5,19,20].…”

“…The atomic and electronic structure of parent Cr 2 GeC MAX phase was examined theoretically following its experimental synthesis by Nowotny [21] in 1971 and several contemporary works [9,20,21]. Nevertheless, the magnetic properties and the effect of substitution by metal atoms have not yet been studied using theoretical approaches.…”

Synthesis, phase purification and magnetic characterization of the (Cr1−x, Mnx)2AlC MAX-phase

“…14,15 Among the ternary MAX-phases, only Mn 2 GaC shows long-range magnetic ordering up to now. [16][17][18] This material has a first order magnetic phase transition at about 210 K from an antiferromagnetic (AFM) at higher temperatures to the non-collinear AFM spin state and a high Ne ´el temperature of 507 K. 17 The potential to tune such magnetic transitions in quaternary MAX-phases by doping with a 4th element is one of the main ideas underlying the search of magnetism in such systems. Up to date, magnetic quaternary MAX-phases were obtained via doping with rareearth elements (namely, (Mo 2/3 Tb 1/3 ) 2 AlC and (Mo 2/3 Er 1/3 ) 2 AlC compounds 19 ) and doping with manganese ((Mo 1/2 Mn 1/2 ) 2 GaC, (Cr,Mn) 2 GaC, (Cr,Mn) 2 GeC, etc.…”