[phys4phys] Center for Solid State Physics and New Materials Seminar: Bojan Stojadinovic - Friday 06.03. 2026.-12h

[Jelena Pesic]

Dear colleagues,

You are kindly invited to the Center for Solid State Physics and New 
Materials seminar, which will be held on Friday 6th March 2025 at 12:00, 
in the library reading room "Dr. Dragan Popović" of the Institute of 
Physics Belgrade.

The talk, entitled "Raman Spectroscopy as a tool for studying 
spin–phonon coupling in multiferroic nanomaterials" will be given by Dr. 
Bojan Stojadinović, Center for Solid State Physics and New Materials, 
IPB.

The abstract of the talk:
Spin–phonon interaction is a key mechanism influencing the magnetic, 
ferroelectric, and magnetoelectric properties of nanostructured 
multiferroic systems. Multiferroic materials, such as BiFeO3, exhibit 
multiple ordered states (ferroelectric and antiferromagnetic), while 
related magnetic oxides, such as rare-earth iron garnets, share a 
similar type of interaction between the lattice and magnetic subsystems, 
arising from strongly correlated d- and f-electrons of magnetic ions. In 
nanostructured magnetic materials, this coupling manifests as anomalous 
temperature-dependent shifts of optical phonon frequencies, particularly 
in the region of the magnetic phase transition, where significant 
changes in spin–spin correlations occur. Raman spectroscopy has proven 
to be an extremely sensitive method for detecting these effects, as it 
allows monitoring of deviations of phonon modes from expected anharmonic 
behavior. By analyzing these deviations and applying mean-field theory 
approaches to describe spin–spin correlations, it is possible to 
quantify the strength of spin–phonon coupling. Within these studies, 
both multiferroic and magnetic systems have been considered, and 
interaction parameters for different phonon modes have been determined.

Best Regards,
Jelena Pesic

-- 
Institute of Physics Belgrade
Pregrevica 118, 11080 Belgrade, Serbia
http://www.ipb.ac.rs/