METHOD FOR PRODUCING 2D GERMANIUM-BASED FERROMAGNETIC MATERIALS EUGE AND GDGE Russian patent published in 2020 - IPC C30B23/08 C30B23/06 C30B29/10 C01F17/10 C23C14/06 C23C14/34 C23C14/54 H01L21/20 H01F41/30 B82B3/00 B82Y30/00 B82Y40/00 

FIELD: technological processes.

SUBSTANCE: invention relates to production of two-dimensional ferromagnetic materials EuGe₂ or GdGe₂, which can be used in creation of compact spintronic devices. Method for producing 2D germanene-based EuGe₂ and GdGe₂ ferromagnetic materials involves precipitation of an atomic flow of europium with pressure P_Eu=(0.1÷100)⋅10^-8 Torr or gadolinium with pressure P_Gd=(0.1÷10)⋅10^-8 Torr on Ge(111) pre-cleaned substrate surface, heated to 290 °C<T_s<510 °C for europium or 400 °C<T_s<510 °C for gadolinium, to formation of a europium germanide film with thickness of not more than 5 nm or a gadolinium germanide film with thickness of not more than 13 nm with subsequent optional annealing of obtained films to temperature not exceeding T_s=530 °C.

EFFECT: invention enables to perform topotactic synthesis of two-dimensional ferromagnetic EuGe₂ or GdGe₂ films of crystalline modification of hP3 with a structure of intercalated europium or gadolinium of multilayer germanene on germanium substrates; produced films do not contain extraneous phases and contain germanene layers parallel to substrate surface.

1 cl, 6 dwg, 4 ex