Spin-flop in transition-metal-doped SnO2 quantum dots

Transition-metal-doped SnO2 quantum dots were synthesized by chemical co-precipitation technique and investigated experimentally. The dots have the chemical composition Sn1-xTxO2, where T = Cr, Mn, Fe, Co, and Ni (x = 0.02 and 0.04), and were capped by polyvinylpyrrolidone. X-ray diffraction analysis has confirmed an impurity-phase-free rutile structure of the samples and the size of the synthesized particles is of the order of 2.5 nm which is...