R2Pt7MnP4-x (R = Ca, Eu): Intrinsic heterostructures based on a combination of AuCu3- and CaBe2Ge2-type fragments with chemically switchable magnetic interplay

Авторы: Makhaneva Anastasiia Yu, Zakharova Elena Yu, Nesterenko Sergey N., Kazakov Sergey M., Lyssenko Konstantin A., Efimov Nikolay N., Bogach Alexey V., Kuznetsov Alexey N.
Журнал: Journal of Alloys and Compounds
Том: 1010
Год издания: 2025
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Номер статьи: 177448
DOI: 10.1016/j.jallcom.2024.177448
Аннотация: Two quaternary phosphide platinides, Eu2Pt7MnP2.96 (I4/mmm, a = 4.0453(7) Å, c = 26.745(4) Å, V = 437.67(17) Å3, Z = 2, R1 = 0.0262, wR2 = 0.0527) and Ca2Pt7MnP3.02 (I4/mmm, a = 4.0027(5) Å, c = 26.735(5) Å, V =428.34(14) Å3, Z = 2, R1 = 0.0280, wR2 = 0.0673) were synthesized as single crystals and bulk samples, their crystal structures were established from single-crystal X-ray diffraction data and confirmed by powder diffraction and elemental analysis. The compounds crystallize in the tetragonal system, and represent heterostructures built from the alternating layers of AuCu3- and CaBe2Ge2-type fragments. Both compounds are metallic based on the DFT calculations. Chemical bonding analysis reveals a pattern of covalent and ionic interactions within each compound. Magnetic measurements show both compounds to be ferromagnetic, and reveal an interplay betweeneuropium and manganese magnetic lattices, indicative of an exchange bias effect.
Добавил в систему: Кузнецов Алексей Николаевич

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