A one-step, template-free synthesis, characterization, optical and magnetic properties of Zn1-xMnxTe nanosheets Academic Article uri icon

abstract

  • The Zn1−xMnxTe nanosheets were synthesized by the one-pot RAPET (reaction under autogenic pressure at elevated temperature) approach. The efficient replacement of Zn by Mn within the Zn1−xMnxTe lattice was confirmed from electron paramagnetic resonance (EPR) experiments. The (111) facets form the main surfaces of the ∼38 nm thick nanosheet structures. Mn catalyzes the formation of a small amount of nanorods (diameter ∼2.6 nm) alongside the nanosheet structures. The magnetic measurements (EPR and SQUID) confirm the +II state of manganese in all the products. Two local environments with strong parallel or antiparallel coupling of the Mn spins exist, specially in the case of Mn:Zn = 0.01 (T1). T1 exhibits a relatively large magnetic moment of 0.12 μB at μ0H = 1.0 T and reflects the contribution of a paramagnetic phase (with antiferromagnetic interactions) and of a ferromagnetic phase. Variable temperature cathodoluminescence measurements were performed for all samples and showed distinct ZnTe near-band edge ...

publication date

  • January 1, 2009