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Eu2Pt7MP4−x(M = Cr, Fe) phosphide platinides, intrinsic heterostructures with a high degree of tunable magnetic anisotropy for spintronics applications

Journal of Materials Chemistry C. 2025. Vol. 13. No. 46. P. 23202–23212.
Polevik A., Zakharova E., Nesterenko S., Lyssenko K.A., Bogach A., Azarevich A.

Two quaternary phosphide platinides, Eu2Pt7CrP2.80 (I4/mmm, a = 4.0268(3) Å, c = 26.813(3) Å, V = 434.78(8) Å3, Z = 2, R1 = 0.0328, wR2 = 0.0785) and Eu2Pt7FeP3.02 (I4/mmm, a = 4.0359(6) Å, c = 26.641(5) Å, V = 433.94(16) Å3, Z = 2, R1 = 0.0276, wR2 = 0.0741) were synthesized as single crystals by a high-temperature route using metallic fluxes (Pb or Bi), their crystal structures were established from single-crystal X-ray diffraction data and confirmed by elemental analysis. The compounds crystallize in the tetragonal system, and represent heterostructures built from the alternating layers of AuCu3- and CaBe2Ge2-type fragments. Based on the DFT-calculations both compounds are metallic. Chemical bonding analysis reveals a pattern of covalent, metallic and ionic interactions within each compound. Magnetic measurements show both compounds to be ferromagnetic with a high degree of magnetic anisotropy, and reveal an antiferromagnetic exchange between two magnetic sublattices (europium and chromium or iron), which makes such compounds promising objects for use in spintronics.

Research target: Chemistry
Language: English
DOI
Keywords: magnetic anisotropy
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