Zobrazeno 1 - 10
of 82
pro vyhledávání: '"Friedt, O."'
Autor:
Steffens, P., Friedt, O., Sidis, Y., Link, P., Kulda, J., Schmalzl, K., Nakatsuji, S., Braden, M.
Publikováno v:
Phys. Rev. B 83, 054429 (2011)
By inelastic neutron scattering, we have analyzed the magnetic correlations in the paramagnetic metallic region of the series Ca(2-x)Sr(x)RuO(4), 0.2<=x<=0.62. We find different contributions that correspond to 2D ferromagnetic fluctuations and to fl
Externí odkaz:
http://arxiv.org/abs/1004.3957
Autor:
Schlappa, J., Chang, C. F., Schierle, E., Tanaka, A., Feyerherm, R., Hu, Z., Ott, H., Friedt, O., Dudzik, E., Hung, H. -H., Benomar, M., Braden, M., Tjeng, L. H., Schuessler-Langeheine, C.
We studied the stripe phase of La1.8Sr0.2NiO4 using neutron diffraction, resonant soft x-ray diffraction (RSXD) at the Ni L2,3 edges, and resonant x-ray diffraction (RXD) at the Ni K threshold. Differences in the q-space resolution of the different t
Externí odkaz:
http://arxiv.org/abs/0903.0994
Autor:
Baier, J., Steffens, P., Schumann, O., Kriener, M., Stark, S., Hartmann, H., Friedt, O., Revcolevschi, A., Radaelli, P. G., Nakatsuji, S., Maeno, Y., Mydosh, J. A., Lorenz, T., Braden, M.
Publikováno v:
J. Low Temp. Phys. 147, 405 (2007)
The magnetoelastic coupling in Ca$_{1.8}$Sr$_{0.2}$RuO$_4$ and in Ca$_{1.5}$Sr$_{0.5}$RuO$_4$ has been studied combining high-resolution dilatometer and diffraction techniques. Both compounds exhibit strong anomalies in the thermal-expansion coeffici
Externí odkaz:
http://arxiv.org/abs/cond-mat/0610769
Autor:
Baier, J., Zabel, T., Kriener, M., Steffens, P., Schumann, O., Friedt, O., Freimuth, A., Revcolevschi, A., Nakatsuji, S., Maeno, Y., Lorenz, T., Braden, M.
Publikováno v:
Physica B 378-380, 497 (2006)
We have studied the influence of a magnetic field on the thermodynamic properties of Ca$_{2-x}$Sr$_{x}$RuO$_4$ in the intermediate metallic region with tilt and rotational distortions ($0.2\leq x \leq 0.5$). We find strong and anisotropic thermal exp
Externí odkaz:
http://arxiv.org/abs/cond-mat/0511220
Autor:
Schuessler-Langeheine, C., Schlappa, J., Tanaka, A., Hu, Z., Chang, C. F., Schierle, E., Benomar, M., Ott, H., Weschke, E., Kaindl, G., Friedt, O., Sawatzky, G. A., Lin, H. -J., Chen, C. T., Braden, M., Tjeng, L. H.
Strong resonant enhancements of the charge-order and spin-order superstructure-diffraction intensities in La1.8Sr0.2NiO4 are observed when x-ray energies in the vicinity of the Ni L2,3 absorption edges are used. The pronounced photon-energy and polar
Externí odkaz:
http://arxiv.org/abs/cond-mat/0502357
Autor:
Steffens, P., Friedt, O., Alireza, P., Marshall, W. G., Schmidt, W., Nakamura, F., Nakatsuji, S., Maeno, Y., Lengsdorf, R., Abd-Elmeguid, M. M., Braden, M.
We studied the crystal and magnetic structure of Ca2RuO4 by different diffraction techniques under high pressure. The observed first order phase transition at moderate pressure (0.5 GPa) between the insulating phase and the metallic high pressure pha
Externí odkaz:
http://arxiv.org/abs/cond-mat/0502332
Autor:
Senff, D., Reutler, P., Braden, M., Friedt, O., Bruns, D., Cousson, A., Bouree, F., Merz, M., Buechner, B., Revcolevschi, A.
The crystal and magnetic structure of La_{1-x}Sr_{1+x}MnO_4 (0
Externí odkaz:
http://arxiv.org/abs/cond-mat/0408141
Autor:
Kriener, M., Steffens, P., Baier, J., Schumann, O., Zabel, T., Lorenz, T., Friedt, O., Mueller, R., Gukasov, A., Radaelli, P., Reutler, P., Revcolevschi, A., Nakatsuji, S., Maeno, Y., Braden, M.
Publikováno v:
Phys. Rev. Lett. 95, 267403 (2005)
The crystal structure of Ca_{2-x}Sr_xRuO_4 with 0.2 < x < 1.0 has been studied by diffraction techniques and by high resolution capacitance dilatometry as a function of temperature and magnetic field. Upon cooling in zero magnetic field below about 2
Externí odkaz:
http://arxiv.org/abs/cond-mat/0408015
We have studied the magnetic excitations in Ca$_{2-x}$Sr$_x$RuO$_4$, x=0.52 and 0.62, which exhibit an anomalous high susceptibility and heavy mass Fermi liquid behavior. Our inelastic neutron scattering experiments reveal strongly enhanced magnetic
Externí odkaz:
http://arxiv.org/abs/cond-mat/0311652
In $\rm Sr_2RuO_4$ the spin excitation spectrum is dominated by incommensurate fluctuations at q=(0.3 0.3 q$_z$), which arise from Fermi-surface nesting. We show that upon Ti substitution, known to suppress superconductivity, a short range magnetic o
Externí odkaz:
http://arxiv.org/abs/cond-mat/0107579