Cwik, M., Benomar, M., Finger, T., Sidis, Y., Senff, D., Lorenz, T., ...
Spin correlations in LSCO have been studied by neutron scattering. The commensurate antiferromagnetic order of the parent compound persists on a very short range up to a Sr content of x=0.3, whereas...
Anisotropic Susceptibility of La_2-xSr_xCoO_4 related to the Spin States of Cobalt (2008)
Hollmann, N., Haverkort, M. W., Cwik, M., Benomar, M., Reuther, M., Tanaka, A., ...
We present a study of the magnetic susceptibility of La_2-xSr_xCoO_4 single crystals in a doping range 0.3=0.5. This includes the pronounced kinks observed in the inverse magnetic susceptibility,...
Magnetoelastic coupling in RETiO3 (RE = La, Nd, Sm, Gd, Y) (2007)
Komarek, A. C., Roth, H., Cwik, M., Baier, J., Kriener, M., ...
A detailed analysis of the crystal structure in RETiO3 with RE = La, Nd, Sm, Gd, and Y reveals an intrinsic coupling between orbital degrees of freedom and the lattice which cannot be fully...
Raman scattering in the Mott insulators LaTiO3 and YTiO3: Evidence for orbital excitations (2006)
Ulrich, C., Gössling, A., Grüninger, M., Guennou, M., Roth, H., Cwik, M., ...
Raman scattering is used to observe pronounced electronic excitations around 230 meV-well above the two-phonon range-in the Mott insulators LaTiO3 and YTiO3. Based on the temperature, polarization,...
Orbital excitations in titanates (2005)
Ulrich, C., Gössling, A., Grüninger, M., Guennou, M., Roth, H., Cwik, M., ...
Raman scattering is used to observe pronounced electronic excitations around 230 meV - well above the two-phonon range - in the Mott insulators LaTiO$_3$ and YTiO$_3$. Based on the temperature,...
Determination of the orbital moment and crystal field splitting in LaTiO$_{3}$ (2004)
Haverkort, M. W., Hu, Z., Tanaka, A., Ghiringhelli, G., Roth, H., Cwik, M., ...
Utilizing a sum-rule in a spin-resolved photoelectron spectroscopic experiment with circularly polarized light, we show that the orbital moment in LaTiO$_3$ is strongly reduced both below and above...
Wolfram,H., Otto,H. H., Cwik,M., Braden,M., André,G., Bourée,F., ...
Structure, Magnetization and Resistivity of La$_{1-x}$M$_x$CoO$_3$ (M = Ca, Sr, and Ba) (2004)
Kriener, M., Zobel, C., Reichl, A., Baier, J., Cwik, M., Berggold, K., ...
We present an investigation of the influence of structural distortions in charge-carrier doped \lmco by substituting La$^{3+}$ with alkaline earth metals of strongly different ionic sizes, that is M...
Wolfram, H., Otto, H. H., Cwik, M., Braden, M., André, G., Bourée, F., ...
Crystal and magnetic structure of LaTiO3 : evidence for non-degenerate $t_{2g}$-orbitals (2003)
Cwik, M., Lorenz, T., Baier, J., Mueller, R., Andre, G., Bouree, F., ...
The crystal and magnetic structure of LaTiO3 ~ has been studied by x-ray and neutron diffraction techniques using nearly stoichiometric samples. We find a strong structural anomaly near the...