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Raman spectroscopy of alpha-FeOOH (goethite) near antiferromagnetic to paramagnetic phase transition
M. V. Abrashev, V. G. Ivanov, B. S. Stefanov +3
Synthetic powder, ore samples and mineral single crystals of goethite (FeOOH) were investigated with polarized Raman spectroscopy at temperatures from 300 K to 473 K. The symme…
Ferromagnetic spinel CuCr2Se4 studied by Raman spectroscopy and lattice dynamics calculations
V. G. Ivanov, M. N. Iliev, Y. -H. A. Wang +1
The lattice dynamics of the ferromagnetic spinel CuCr2Se4 (Tc = 430K) was studied experimentally by measuring the Raman spectra and theoretically by calculation of zone center phon…
Short-Range B-site Ordering in Inverse Spinel Ferrite NiFe2O4
V. G. Ivanov, M. V. Abrashev, M. N. Iliev +3
The Raman spectra of single crystals of NiFe2O4 were studied in various scattering configurations in close comparison with the corresponding spectra of Ni0.7Zn0.3Fe2O4 and Fe3O4. T…