Valeriy Mikhailovich Fedosyuk (b. 17.06.1954, Maryina Gorka, Minsk region) - a scientist in the field of solid state physics. Corresponding Member (2014), Doctor of Physico-Mathematical Sciences (1992). Professor Emeritus of the University of Santiago de Compostela (Spain, 1995). Honored Scientist of the Republic of Belarus (2014).
He carried out systematic studies of the structure and magnetic properties of amorphous and nanocrystalline soft magnetic and hard magnetic films of alloys of the iron group with a number of metalloids and refractory metals. He modeled and experimentally confirmed the process of magnetization reversal of two-layer exchange-coupled films, as well as films with a columnar type of microstructure and perpendicular magnetic anisotropy. He created a priority direction in obtaining and researching nanoscale multilayer magnetic structures with a thickness of up to several atomic layers by means of pulsed electrolytic deposition. As a result of studies of multilayer systems Co/Cu, Fe/Cu, CoNiW/Cu, CoFeP/Cu, Co/Ag and others, revealed the role of "surface" anisotropy of the interface between the layers in the manifestation of the physical properties of nanoscale multilayer films. He discovered the effect of isotropic “giant” magnetoresistance, due to the predominant scattering of conduction electrons with different spin directions on the magnetic moments of neighboring nanolayers with repeating antiparallel orientation. Received and investigated systems consisting of a diamagnetic matrix and nanoscale magnetically ordered clusters. Using quantum magnetometry, he found out the role of the interaction of magnetic clusters in the manifestation of the superparamagnetic properties of such systems and the effect on the magnitude of their “giant” magnetoresistance. He developed methods for obtaining and studying multilayer and granular nanowires with the maximum effect of “giant” magnetoresistance. Received nanoscale multilayer structures of a new “spin-valve” type with unique magnetoresistive properties. Developed and patented a number of nanoscale magnetic structures that are promising for practical use.
Author of more than 300 scientific papers, including 14 author and collective monographs, more than 30 copyright certificates and patents.
State Prize of the Republic of Belarus (2004) for the work “Magnetic structures and physical properties of multicomponent systems with transition and rare-earth elements, development of new magnetic materials, creation and production of elements and devices of electronic equipment”. Prize of the RAS and the National Academy of Sciences of Belarus (2015) for the series of works “Materials and film heterostructures for spintronics and magnonics devices”.
Awarded with the Francisk Skaryna Medal (2004), other medals.