May 2, Monday
2 PM
Sumwalt 120A
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Vladimir Golub
Institute of Magnetism, National Academy of Sciences of Ukraine

Applications of ferromagnetic resonance

In spite of a big progress in modernization of conventional magnetic 
measurements techniques such as VSM and SQUID magnetometries FMR is 
widely used for characterization and investigation of different magnetic 
materials. This is connected with the following advantages of FMR technique:
1.	High sensitivity of this technique even in comparison with modern SQUID 
magnetometers.
2.	The possibility to separate contribution from different magnetic phases 
and magnetic structure units (different magnetic layers, granules, etc.) 
3.	No influence of diamagnetic subsystems (such as substrates of films, 
diamagnetic matrix, etc.) and possibility to separate a contribution from 
paramagnetic ones.
4.	The possibility to obtain data about exchange interaction inside 
magnetic materials or between magnetic components of magnetic materials.
5.	FMR measurement is one of the easiest way to determine a saturation 
magnetization of magnetic samples of nonspherical shape (especially for thin films).
6.	The power of FMR technique for magnetic anisotropy and magnetostatic 
interaction investigation.
7.	Spin wave study of the magnetic samples.

To demonstrate the possibility of FMR technique some resent results obtained 
in the Institute of Magnetism on different magnetic materials (perofskite and 
Heisler alloys thin films, granular films and multilayers, ensembles of magnetic 
nanodots, etc.) will be shown in this presentation.