Registration Number
0220U100058,
0118U003714
, R & D reports
Title
Functional elements of high-frequency magnetoelectrics on the basis of textured materials with controlled phase separation.
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Head
Dzhezherya Yuriy I., Доктор фізико-математичних наук
Registration Date
08-01-2020
Organization
Institute of Magnetism of the National Academy of Sciences of Ukraine and Ministry of Education and Sciences of Ukraine
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Flexoelectric and flexomagnetic effects can be important in ferromagnetic or antiferromagnetic thin films, nanoparticles, magnetic vortices, skyrmions, and other curved domain structures. Using a direct matrix method we establish the structure, including the number of nonzero independent elements, of the static flexoelectric coupling tensor for all 32 point groups, and the poorly studied flexomagnetic coupling tensor for all 90 magnetic classes. For several point symmetries most important for applications we visualize the effective flexoelectric/flexomagnetic response of the bended plate, analyze its anisotropy, and angular dependences for arbitrary orientation of the sample. With known angular dependence, there is no need to measure effective flexoresponse by continuously changing orientation of the crystal; it is enough to measure it along several crystallographic directions. Obtained results open the way for unambiguous determination of flexoelectric/flexomagnetic tensors from bending and scattering experiments, opening the way for its novel applications.
The second section is devoted to the study of the line width of the ferromagnetic resonance (FMR) and anisotropy in multilayered layers of SAF arrays (Synthetic Antiferromagnetic) with a square cell. The focus here is on developing a promising way of managing the phase state, both of the individual storage cell and the array as a whole. As well as determining the frequency of the equilibrium state.
Product Description
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Джежеря Юрій Іванович
Pashchenko Oleksandr V.
Titenko Anatolii M.
Кhist Viktoriia V.
Cherepov Serhii V.
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2020-04-02
