Crystal Structure, Charge Transport, and Magnetic Properties of MnSb₂Se₄

Abstract

Keywords: Manganese / Antimony / Selenium / Semiconductors / Magnetic properties / Thermoelectricity A single phase of MnSb 2 Se 4 was synthesized by combining high-purity elements at 773 K. Single-crystal X-ray diffraction revealed that MnSb 2 Se 4 is isostructural with FeSb 2 Se 4 crystallizing in the monoclinic space group C2/m with a = 13.076(3) Å, b = 3.965(2) Å, c = 15.236(4) Å, β = 115.1(2)°, Z = 4. MnSb 2 Se 4 melts congruently at 790 K and is thermally stable up to 1000 K. Electronic band structure calculations, infrared diffuse reflectance spectroscopy, and low-temperature electronic transport data indicate that MnSb 2 Se 4 is a narrow-bandgap p-type semiconductor with an energy

Helimagnetism in MnBi2Se4 Driven by Spin-Frustrating Interactions Between Antiferromagnetic Chains

“…This triangulated arrangement of interchain contacts described by the J 2 exchange constant should also contribute to spin frustration. We expect that the same helimagnetic structure should be observed for the isostructural compound MnSb 2 Se 4 that orders AFM at T N = 20 K [28]. These three materials, which belong to the FeSb 2 Se 4 structure type, exhibit gradual decrease in the T N value from MnSb 2 S 4 to MnSb 2 Se 4 to MnBi 2 Se 4 .…”

REFINEMENT OF THE PHASE DIAGRAM OF THE MnTe–In2Te3 SYSTEM

“…Ternary and more complex chalcogenides based on 3d-elements, in particular manganese, are of great practical interest as materials combining magnetic and semiconducting properties [1][2][3][4][5][6][7][8]. Recent studies have shown that some of them are magnetic topological insulators and extremely promising for use in spintronics and quantum computing [9][10][11][12][13][14][15].…”

Crystal Structure of FePb4Sb6Se14 and its Structural Relationship with FePb3Sb4Se10

“…The magnetic substructures are isolated from each other by semiconducting frameworks, with various dimensionalities, containing main‐group metal and chalcogenide elements. Several such compounds, for example, MnSb 2 (S, Se) 4 ,21,22 FePb 3 Sn 4 Sb 2 S 14 ,23 and (Mn, Fe)Pb 4 Sb 6 S 14 ,24–26 are one‐dimensional (1D) anti‐ferromagnetic semiconductors containing quasi‐isolated magnetic single straight chains of edge‐sharing MQ 6 (M = Mn, Fe; Q = S, Se) octahedra separated by the main‐group metal chalcogenide semiconducting framework. Recently, we observed the coexistence of a robust ferromagnetism and semiconductivity above room temperature in the FeSb 2 Se 4 and Fe x Pb 4– x Sb 4 Se 10 compositions 27,28.…”

“…For instance, the band gap of the magnetic and semiconducting chalcogenides can be tuned from values lower than 0.1 eV to values as high as 2.0 eV by altering the nature of the chalcogenide atom (S, Se, or Te) and/or by isoelectronic substitutions at the main‐group metal positions within the crystal structure. For example, the band gap of MnSb 2 Q 4 changes from 0.7 eV22 for Q = S to 0.32 eV for Q = Se 21. In addition, upon substitution of antimony by bismuth in MnSb 2 Se 4 , the band gap of MnBi 2 Se 4 further decreases to less than 0.1 eV, and the electronic conduction in the compound change from p ‐type for MnSb 2 Se 4 to n ‐type for MnBi 2 Se 4 21,29.…”

“…For example, the band gap of MnSb 2 Q 4 changes from 0.7 eV22 for Q = S to 0.32 eV for Q = Se 21. In addition, upon substitution of antimony by bismuth in MnSb 2 Se 4 , the band gap of MnBi 2 Se 4 further decreases to less than 0.1 eV, and the electronic conduction in the compound change from p ‐type for MnSb 2 Se 4 to n ‐type for MnBi 2 Se 4 21,29. A similar situation is observed for the p ‐type ferromagnetic semiconductor FeSb 2 Se 4 27 upon substitution of antimony by bismuth.…”