Research
My research experience in condensed matter physics spans more than 15 years.
This experience covers a wide range of problems in the physics of magnetism and magnetic materials and
it is reflected in more than 40 publications
in archival journals and conference proceedings, and more than 25 authored and co-authored
presentations at international conferences and colloquia.
My graduate and PhD studies at the Slovak University of Technology were related to the study of ferromagnetic hysteresis and magnetic loss in low-frequency applications, such as power transmission and magnetic sensors. In particular, my PhD thesis "Influence of scattering effects on complex permeability in oriented materials" was related to the connection between the magnetic hysteresis and the relaxation processes in the grain-oriented SiFe materials. I have also participated in the project of synthesis and study of magneto-composite materials. These materials consisted of ferrite particles embedded in a polymer matrix. The frequency range of their application depends on the type of used materials, and it varies from tens of kHz up to tens of MHz.
In 2003 I joined the Department of Physics at the Colorado State University in Fort Collins, Colorado. Here I started work on linear and nonlinear magnetic excitations in GHz range. These include parametric spin wave excitations in thin magnetic films, relaxation mechanisms, and spin wave modes in small magnetic structures. I was responsible for the development of theoretical models and the data analysis in close collaboration with experimentalists. This team collaboration resulted in several exciting papers, such as the reports on the first quantitative description of the spin wave instability processes in metallic films (An et al., J. Appl. Phys. 96, 1572 (2004); Olson et al., J. Appl. Phys. 102, 023904 (2007); Gerrits et al., Phys. Rev. Lett. 98, 207602 (2007)), or the development of a concise model of two-magnon relaxation in ferromagnetic systems (McMichael and Krivosik, IEEE Trans. Magn. 40, 2 (2004); Krivosik et al., J. Appl. Phys. 101, 083901 (2007)). In a meantime, I particularly enjoyed to create visualizations of the physical concepts behind our work.
In May 2009 I joined the Center for Magnetism and Magnetic Nanostructures of the Department of Physics and Energy Science at the University of Colorado at Colorado Springs (UCCS) as a Senior Research Associate. My research program at UCCS is focused on the development and characterization of advanced microwave signal processing devices based on novel technologies such as metallic thin film microstrip lines and liquid crystals. Expected working frequencies for these devices lie in 10-100 GHz range. My work at the UCCS is mainly experimental and I utilize all my theoretical knowledge for the experimental design. Currently I am working on the detection of parametrically excited spin waves in metallic films using Brillouin light scattering.