5 papers · 1 filter
Intermediate-valence behavior of the transition-metal oxide CaCuRuO
A. Krimmel, A. Günther, W. Kraetschmer +7
The transition--metal oxide CaCuRuO with perovskite--type structure shows characteristic properties of an intermediate--valence system. The temperature--dependent su…
Magnetic and magnetoelectric excitations in TbMnO
A. Pimenov, A. Shuvaev, A. Loidl +5
Magnetic and magnetoelectric excitations in the multiferroic TbMnO_3 have been investigated at terahertz frequencies. Using different experimental geometries we can clearly separat…
Optical Spectroscopy in CoO: Phonons, Electric, and Magnetic Excitations
Ch. Kant, T. Rudolf, F. Schrettle +5
The reflectivity of single-crystalline CoO has been studied by optical spectroscopy for wave numbers ranging from 100 to 28,000\wn and for temperatures 8 325 K\@. A splitti…
Relaxations as key to the magnetocapacitive effects in the perovskite manganites
F. Schrettle, P. Lunkenheimer, J. Hemberger +4
We present a detailed dielectric study of the relaxation effects that occur in several perovskite rare-earth manganites, including the multiferroics TbMnO3 and DyMnO3. We demonstra…
Optical properties of ZnCr2Se4 - Spin-phonon coupling and electronic d-d-like excitations
T. Rudolf, Ch. Kant, F. Mayr +4
We studied the optical properties of antiferromagnetic ZnCr2Se4 by infrared spectroscopy up to 28,000 cm-1 and for temperatures from 5 to 295 K. At the magnetic phase transition at…