Preparation and characterization of compounds of the system Fe(Sb1−xTex)2 (0 ⩽ x ⩽ 1.0)

Magnetism and metal-insulator transition inFe(Sb1−xTex)2Hu1, Mitrović2, Petrović3 2009Phys. Rev. B205330View full textAdd to dashboardCite

“…For x Ͼ 0.5, it is predicted that the addition of an electron in the ⌶ state of the low-spin configuration would contribute negatively to the effective moment. 9 Our observation confirms this prediction.…”

“…The crystal structure changes from marcasite-type orthorhombic to arsenopyrite-type monoclinic at x = 0.4 and restores to marcasite above x = 0.5. Yamaguichi et al 9 found that the arsenopyrite phase existed for 0.4Յ x Յ 0.6. The discrepancy with our result may be due to the different synthesis route used in analysis of polycrystalline material in Ref.…”

“…FeTe 2 is reported to be a semiconductor with an antiferromagnetic transition at about 83 K. 7 Mössbauer measurements on Te-doped FeSb 2 indicate that Fe has 3d 6 configuration in pure FeTe 2 and one electron is added per antimony atom to the conduction band in the Fe͑Sb 1−x Te x ͒ 2 compounds. 8,9 It is also revealed that the Fe ion is tuned from Fe 4+ to Fe 2+ by addition of Te. 9 In this work we report the magnetism and electrical transport properties of Fe͑Sb 1−x Te x ͒ 2 single crystals.…”

“…8,9 It is also revealed that the Fe ion is tuned from Fe 4+ to Fe 2+ by addition of Te. 9 In this work we report the magnetism and electrical transport properties of Fe͑Sb 1−x Te x ͒ 2 single crystals. A systematic study of the effects of Te doping on FeSb 2 is presented.…”

57Fe Mössbauer study of ternary alloy systems Fe(Sb1−x Te x )2 for 0.5≤x≤1.0 at 4.2K

“…Yamaguchi et a/. 57Fe MSssbauer studies of these alloys at room temperature and 77 K [5,6] yielded broadened quadrupole doublets for the alloys with 0.2 ~< x ~< 0.7. The alloys with 0.7 ~< x ~< 1.0 again have the marcasite-type orthorhombic structure and are paramagnetic semiconductors with Eg = 0.1-0.4 eV.…”