Laboratory of Magnetic Semiconductors

Current directions of work

Main research activity is conducted within the state assignment of Ministry of Science and Higher Education of the Russian Federation in the topic "Spin": spin, charge and thermal kinetic phenomena in magnetically ordered condensed materials and magnetic nanoheterostructures.

The Laboratory participated in the program of the Ural Branch of the Russian Academy of Sciences in the project "Functional magnetic materials and based on them nanostructures for spintronics". The project included:

• Development of the technology for preparing composite, thin-film and nanostructures based on 3d- and 4f-metal compounds;
• Experimental investigation of microwave, magnetic, electrical, structural and magneto-optical properties of the obtained compounds;
• Studying the mechanisms of spin-dependent phenomena and the peculiarities of magnetism in the obtained structures;
• Developing and studying new functional magnetic materials for spintronics and optoelectronics.

 The main results are laid out in the following areas:

• Layered cobaltites based on RBaCo₂O_5+d (R is a rare-earth element). Study of the influence of local distortions caused by the replacement of a rare-earth ion, deviation from stoichiometry in the cation sublattices, varying the oxygen content, and nanostructuring on the spin states of cobalt ions; study of the unidirectional anisotropy of magnetoresistance, mechanisms of phase separation of phases, identification of interrelations between the magnetic and electronic subsystems.
• Creation of optical composites based on doped manganites and study of the effect of external (crystallite size, matrix used, introduction of an additional component into the composite) and internal (doping, stoichiometry) parameters of a material with improved magneto-optical properties.
• Development of technology and creation of heterostructures for spin injection in ferromagnet-semiconductor film nanoheterostructures.
• Experimental and theoretical study of the propagation of spin waves in magnets with low damping in thin-film magnets, the issues of conservation of momentum, angular momentum and energy in the processes of excitation and damping of the magnetic subsystem in magnetically ordered materials.

New directions: 1) strain-magneto-optics. Study of magneto-optical effects in single crystals of ferrite-spinel, arising due to magnetoelastic deformations, which is important for the creation of new optoelectronic devices. 2) photoinduced effects in permanent and variable magnetic and electric fields in magnetic semiconductors.