Ferromagnetism in Mn-doped Sb(2)Te.
We report that Sb2Te, a natural superlattice phase consisting of two elemental Sb2 layers interleaved with single Sb2Te3 layers, becomes ferromagnetic at low temperatures on doping with small percentages of Mn. Ferromagnetism appears for Mn concentrations as low as Sb1.98Mn0.02Te, where a ferromagnetic Tc of ~8.6 K is observed. Tc decreases with increasing Mn content in the stoichiometric materials but increases with increasing Te excess in materials of the type Sb1.93-yMn0.07Te1+y, starting at ~3 K at y = 0 and reaching a Tc of ~8.9 K at y = 0.06.
Department of Chemistry, Princeton University, Princeton, New Jersey, 08544, USA.
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Cava
D000965:Antimony / Q000737:chemistry*; D003198:Computer Simulation; D017097:Electric Impedance; D060526:Magnetic Fields; D059346:Magnets; D008345:Manganese / Q000737:chemistry*; D008956:Models, Chemical; D013691:Tellurium / Q000737:chemistry*
D008345:Manganese; D000965:Antimony; D013691:Tellurium