Mads C. Weber

Phonon Raman scattering of RCrO_{3} perovskites (R=Y, La, Pr, Sm, Gd, Dy, Ho, Yb, Lu)

We report a systematic investigation of orthorhombic perovskite-type RCrO3 powder samples by Raman scattering for nine different rare earth R3+ cations (R = Y, La, Pr, Sm, Gd, Dy, Ho, Yb, and Lu). The room-temperature Raman spectra and the associated phonon mode assignment provide reference data for structural investigation of the whole series of RCrO3 orthochromites and phonon ab-initio calculations. The assignment of the chromite spectra and comparison with Raman data on other orthorhombic perovskites allows correlating the phonon modes with the structural distortions in the RCrO3 series. In particular, two Ag modes are identified as octahedra rotation soft modes, as their positions scale linearly with the octahedra tilt angle of the CrO6 octahedra.

Raman spectroscopy of rare-earth orthoferrites RFeO3 (R=La, Sm, Eu, Gd, Tb, Dy)

We report a Raman scattering study of six rare-earth orthoferrites

Structures and Magnetism of the Rare-Earth Orthochromite Perovskite Solid Solution LaxSm1–xCrO3

R{\mathrm{FeO}}_{3}

Direct observation of polar tweed in LaAlO3.

, with

Multiple strain-induced phase transitions inLaNiO3thin films

R

Interplay of chemical structure and magnetic order coupling at the interface between Cr2O3 and Fe3O4 in hybrid nanocomposites

= La, Sm, Eu, Gd, Tb, Dy. The use of extensive polarized Raman scattering of

Temperature evolution of the band gap in BiFeO3 traced by resonant Raman scattering

{\mathrm{SmFeO}}_{3}

Probing Individual Layers in Functional Oxide Multilayers by Wavelength-Dependent Raman Scattering

and first-principles calculations enable the assignment of the observed phonon modes to vibrational symmetries and atomic displacements. The assignment of the spectra and their comparison throughout the whole series allow correlating the phonon modes with the orthorhombic structural distortions of

Suppression of the cooperative Jahn-Teller distortion and its effect on the Raman octahedra-rotation modes of TbMn1-&ITx&ITFe&ITx&ITO3

R{\mathrm{FeO}}_{3}

ELECTRONIC AND STRUCTURAL PROPERTIES OF BISMUTH- AND RARE-EARTH-FERRITES

perovskites. In particular, the positions of two specific