Zobrazeno 1 - 10
of 433
pro vyhledávání: '"O. Trovarelli"'
Autor:
M. Rams, O. Trovarelli, Paul C. Canfield, Pierre Bonville, K. Królas, J. P. Sanchez, C. Geibel
Publikováno v:
The European Physical Journal B. 55:77-84
We have examined the magnetic properties of the heavy electron compounds YbAgGe and YbPtIn by 170Yb Mossbauer spectroscopy down to 0.1 K, and the crystal field properties of YbAgGe by Perturbed Angular Correlations (PAC) measurements up to 900 K. In
Autor:
Piers Coleman, Steffen Wirth, Philipp Gegenwart, T. Lühmann, Silke Paschen, O. Trovarelli, Qimiao Si, Frank Steglich, C. Geibel
Publikováno v:
Nature. 432:881-885
A quantum critical point (QCP) develops in a material at absolute zero when a new form of order smoothly emerges in its ground state. QCPs are of great current interest because of their singular ability to influence the finite temperature properties
Publikováno v:
Scopus-Elsevier
The heavy fermion compounds CeCu 2 Si 2 , CeRh 2 Si 2 and CePd 2 Si 2 have been intensively investigated due to the non-conventional relation between superconductivity and magnetism. We have studied these compounds as constituents of a ternary system
Autor:
K. Neumaier, Philipp Gegenwart, Frank Steglich, Heribert Wilhelm, Noriaki K. Sato, O. Trovarelli, Naofumi Aso, J. Custers, C. Geibel
Publikováno v:
Physica B: Condensed Matter. :441-445
We discuss recent results obtained for the heavy-fermion metals UPd2Al3 and YbRh2Si2. UPd2Al3 is the first among all superconductors for which tunneling and inelastic neutron-scattering data highlight a non-phononic, i.e., magnetic-exciton mediated,
Publikováno v:
Journal of Physics: Condensed Matter. 14:10731-10736
We present a detailed pressure study of the electrical resistivity ρ(T) and the specific heat C(T) of the non-Fermi-liquid (NFL) compound YbRh2Si2 and of ρ(T) for a single crystal in which 5 at.% of Si is replaced by isoelectronic Ge. The magnetic
Publikováno v:
Physica B: Condensed Matter. 320:380-383
Due to the proximity of CeCu2Si2 to a quantum critical point, the ground state of this compound is extremely sensitive to sample preparation conditions. Small excess of one component can lead to magnetic or superconducting behaviors. We found that in
Publikováno v:
Journal of Alloys and Compounds. :396-399
We present resistivity, magnetoresistance, magnetisation and heat capacity results on EuRh2Si2. Magnetic susceptibility and specific heat data confirm the reported magnetic transition at 25 K and reveal an additional magnetic transition at 23.5 K. Is
Publikováno v:
Journal of Physics: Condensed Matter. 13:L79-L88
We report on the basis of Cu-NQR measurements that superconductivity (SC) and antiferromagnetism (AF) coexist on a microscopic level in CeCu_{2}(Si_{1-x}Ge_{x})_{2}, once a tiny amount of 1%Ge (x = 0.01) is substituted for Si. This coexistence arises
Autor:
O. Trovarelli, Frank Steglich, K. Kashima, K. Obinata, Yu Kawasaki, Yasuo Kitaoka, K. Ishida, K. Tabuchi, C. Geibel
Publikováno v:
Hyperfine Interactions. 133:163-167
We report Cu-NQR results on Ge-doped heavy-fermion superconductor CeCu2(Si1−x Ge x )2 (0
Autor:
J.P. Sanchez, O. Trovarelli, Pierre Bonville, C. Geibel, Mohsen M. Abd-Elmeguid, B. Malaman, Eric Ressouche
Publikováno v:
Europhysics Letters (EPL). 51:427-433
Measurements by 170Yb Mossbauer spectroscopy down to 0.025 K and by neutron diffraction down to 1.7 K have been performed in the heavy electron compound YbPtAl (TN 5.8 K). At 0.025 K, the Mossbauer spectrum evidences a non-square modulation of the ma