Generation of diluted magnetic semiconductor nanostructures by pulsed laser ablation in liquid

Ol. A. Savchuk; A. I. Savchuk; I. D. Stolyarchuk; P. M. Tkachuk; V. I. Garasym

doi:10.1117/12.2228919

30 November 2015 Generation of diluted magnetic semiconductor nanostructures by pulsed laser ablation in liquid

Ol. A. Savchuk, A. I. Savchuk, I. D. Stolyarchuk, P. M. Tkachuk, V. I. Garasym

Proceedings Volume 9809, Twelfth International Conference on Correlation Optics; 98090Y (2015) https://doi.org/10.1117/12.2228919
Event: 12th International Conference on Correlation Optics, 2015, Chernivsti, Ukraine

Abstract

Results of study of two members of diluted magnetic semiconductor (DMS) family, namely Cd_1-xMn_xTe and Zn_1-xMn_xO, which are in form of micro- and nanoparticles generated by pulsed laser ablation in liquid medium (PLAL), have been presented. The structural analysis using X-ray diffraction (XRD) of nanocrystals indicated that Mn has entered the A^IIB^VI lattice without changing the crystal structure and systematically substituted the A²⁺ ions in the lattice. Atomic force microscopy (AFM) gives information about surface morphology of the formed nanostructures. The scanning electron microscopy (SEM) clearly illustrates flower-like particles of Zn_1-xMn_xO, which consist of nanosheets and nanoleaves with average thickness about (5-8) nm. Obviously, these nanoobjects are responsible for the observed blue shift of the absorption edge in DMS nanostructures. In magneto-optical Faraday rotation spectra of both Cd_1-xMn_xTe and Zn_1-xMn_xO nanostructures there were exhibited peculiarities associated with s,p-d spin exchange interactions and confinement effect. It was observed almost linear dependence of the Faraday rotation as function of magnetic field strength for nanoparticles in contrast to the dependence with saturation in bulk case.

Citation Download Citation

Ol. A. Savchuk, A. I. Savchuk, I. D. Stolyarchuk, P. M. Tkachuk, and V. I. Garasym "Generation of diluted magnetic semiconductor nanostructures by pulsed laser ablation in liquid", Proc. SPIE 9809, Twelfth International Conference on Correlation Optics, 98090Y (30 November 2015); https://doi.org/10.1117/12.2228919

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