Magnetic Properties of the CoCr0.5Ga1.5S4 Compound

Шабунина, Г. Г.; Busheva, E. V.; Vasil’ev, P. N.; Ефимов, Н. Н.

doi:10.1134/s0020168522060139

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“…Furthermore, moderate values of U induce weak ferromagnetism, which is confirmed by the magnetization measurements in FeAl 2 S 4 . 11 The presence of strong electronic correlations can be unveiled, for example, by modification of the chemical composition, as in the case of CoCr 0.5 Ga 1.5 S 4 compound, where the ferrimagnetic state appears below the Curie temperature of T C = 205 K. 19 Thus, the family of TM 2 Ch 4 compounds demonstrate rich physical properties, including spin-glass behavior and strong electronic correlations, on the 2D triangular arrangement of transition-metal atoms. Introduction of these functional and structural properties into novel spintronic devices may foster the field.…”

Section: ■ Introductionmentioning

confidence: 99%

Layered van der Waals Chalcogenides FeAl₂Se₄, MnAl₂S₄, and MnAl₂Se₄: Atomically Thin Triangular Arrangement of Transition-Metal Atoms

et al. 2023

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Layered van der Waals (vdW) chalcogenides of 3d transition metals are a rich source of two-dimensional (2D) nanomaterials, in which atomically thin layers with the terminating chalcogen atoms exhibit promising functionality for novel spintronic devices. Here, we report on the synthesis, crystal growth, and magnetic properties of FeAl2Se4, MnAl2S4, and MnAl2Se4 ternary chalcogenides. Crystal structures are probed by powder X-ray diffraction, Mössbauer spectroscopy, and high-resolution transmission electron microscopy. We improve the structural models of FeAl2Se4 and MnAl2S4 and show that isostructural MnAl2S4 and MnAl2Se4 crystallize in the centrosymmetric R3̅̅m space group. In the crystal structure, transition metal and Al atoms mutually occupy the octahedral and tetrahedral voids of four close-packing chalcogen layers terminated by vdW gaps. The transition-metal atoms form a triangular arrangement inside the close-packing layers. As a result, FeAl2Se4 and MnAl2S4 show no long-range magnetic order in the studied temperature range. In the paramagnetic state, Fe and Mn possess effective magnetic moments of 4.99(2) and 5.405(6) μB, respectively. Furthermore, FeAl2Se4 enters a frozen spin-disordered state below 12 K.

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Section: ■ Introductionmentioning

confidence: 99%

Layered van der Waals Chalcogenides FeAl₂Se₄, MnAl₂S₄, and MnAl₂Se₄: Atomically Thin Triangular Arrangement of Transition-Metal Atoms

et al. 2023

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Magnetic Properties of the CoCr0.5Ga1.5S4 Compound

Cited by 1 publication

References 28 publications

Layered van der Waals Chalcogenides FeAl₂Se₄, MnAl₂S₄, and MnAl₂Se₄: Atomically Thin Triangular Arrangement of Transition-Metal Atoms

Layered van der Waals Chalcogenides FeAl₂Se₄, MnAl₂S₄, and MnAl₂Se₄: Atomically Thin Triangular Arrangement of Transition-Metal Atoms

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Magnetic Properties of the CoCr0.5Ga1.5S4 Compound

Cited by 1 publication

References 28 publications

Layered van der Waals Chalcogenides FeAl2Se4, MnAl2S4, and MnAl2Se4: Atomically Thin Triangular Arrangement of Transition-Metal Atoms

Layered van der Waals Chalcogenides FeAl2Se4, MnAl2S4, and MnAl2Se4: Atomically Thin Triangular Arrangement of Transition-Metal Atoms

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Layered van der Waals Chalcogenides FeAl₂Se₄, MnAl₂S₄, and MnAl₂Se₄: Atomically Thin Triangular Arrangement of Transition-Metal Atoms

Layered van der Waals Chalcogenides FeAl₂Se₄, MnAl₂S₄, and MnAl₂Se₄: Atomically Thin Triangular Arrangement of Transition-Metal Atoms