Abstract
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.
Original language | English (US) |
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Article number | 206002 |
Journal | Journal of Physics Condensed Matter |
Volume | 26 |
Issue number | 20 |
DOIs | |
State | Published - May 21 2014 |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- General Materials Science
Keywords
- diluted ferromagnetic semiconductor
- ferromagnetism