Zobrazeno 1 - 10
of 113
pro vyhledávání: '"D. Petitgrand"'
Publikováno v:
Physical Review B. 94
The damping $(\mathrm{\ensuremath{\Gamma}}a)$ of the transverse acoustic (TA) phonon in single crystals of the relaxor $\mathrm{KT}{\mathrm{a}}_{1\ensuremath{-}x}\mathrm{N}{\mathrm{b}}_{x}{\mathrm{O}}_{3}$ with $x=0.15--0.17$ was studied by means of
Autor:
P. Bourges, Matteo d'Astuto, M. Loewenhaupt, Alexandre Ivanov, N. Pyka, H. Casalta, D. Petitgrand, A. Metz
Publikováno v:
Physical Review B. 61:14311-14314
Model predictions for the Nd spin-wave dispersion in ${\mathrm{Nd}}_{2}{\mathrm{CuO}}_{4}$ have been tested with high-resolution inelastic neutron scattering on a single crystal at $T=0.5\mathrm{K}.$ A Heisenberg model in the random phase approximati
Publikováno v:
Physical Review B. 59:1079-1104
It is shown that pseudodipolar interaction allows one to explain static and dynamic properties of the noncollinear antiferromagnets, ${R}_{2}{\mathrm{CuO}}_{4},$ in the temperature range where the rare-earth (RE) angular momenta are slightly polarize
Publikováno v:
Physical Review B. 57:471-475
A neutron-scattering investigation of the static and low-energy $(\ensuremath{\Elzxh}\ensuremath{\omega}l~2\mathrm{meV})$ magnetic signals in undoped single-crystalline ${\mathrm{Nd}}_{2}{\mathrm{CuO}}_{4}$ is presented from 1.5 K to room temperature
Publikováno v:
Physical Review B. 55:983-993
Autor:
Werner Paulus, Martin Meven, Ph. Bourges, Gernot Heger, D.I. Zhigunov, D. Petitgrand, P. Adelamann, Alain Cousson, Markus Braden, P. Vigoureux, S. N. Barilo, J. P. Lauriat, Arsen Gukasov
Publikováno v:
Physica C: Superconductivity. 273:239-247
The structural phase transition in Gd 2− x Ce x CuO 4 ( x = 0, 0.12) characterized by the rotation of the CuO 4 -squares around the c axis has been studied by different diffraction techniques. The order parameter of this transition is found to incr
Publikováno v:
Solid State Communications. 100:683-686
We present inelastic neutron scattering measurements of the low temperature magnetic excitations associated with Nd ordering in single crystalline Nd2CuO4. At T = 1.5 K, four distinct, weakly dispersive, low lying modes around 0.05, 0.09, 0.14, and 0
Publikováno v:
High Pressure Research. 14:29-34
Uniform high pressure experiments up to 5 kbar on quasi one-dimensional singlet ground state and the induced magnetic moment systems AFeX3 are reported. The pressure-induced changes in the magnetic ordering vector are related to induced structural ph
Autor:
D. Petitgrand, I.A. Zobkalo, L. Boudarene, D.N. Zhigunov, Arsen Gukasov, P. Bourges, V.A. Polyakov, S. N. Barilo
Publikováno v:
Solid State Communications. 95:533-536
The results of polarized neutron scattering confirm that the magnetic structure of Sm 2 CuO 4 is of the La 2 CuO 4 -type. No magnetic moment of the Sm-ions induced by the Sm-Cu coupling has been found in the temperature range 4.2–300K. Two-dimensio
Publikováno v:
Physical Review B. 85
We present an inelastic neutron-scattering study of phonon line shapes in the vortex state of the type II superconductor YNi${}_{2}$B${}_{2}$C. In a previous study [Phys. Rev. Lett. 101, 237002 (2008)] it was shown that certain phonons exhibit a clea