Search Results - (Author, Cooperation:A. Revcolevschi)
-
1Latest Papers from Table of Contents or Articles in PressA. J. Achkar ; M. Zwiebler ; C. McMahon ; F. He ; R. Sutarto ; I. Djianto ; Z. Hao ; M. J. Gingras ; M. Hucker ; G. D. Gu ; A. Revcolevschi ; H. Zhang ; Y. J. Kim ; J. Geck ; D. G. Hawthorn
American Association for the Advancement of Science (AAAS)
Published 2016Staff ViewPublication Date: 2016-02-26Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsPublished by: -
2Latest Papers from Table of Contents or Articles in PressJ. Schlappa ; K. Wohlfeld ; K. J. Zhou ; M. Mourigal ; M. W. Haverkort ; V. N. Strocov ; L. Hozoi ; C. Monney ; S. Nishimoto ; S. Singh ; A. Revcolevschi ; J. S. Caux ; L. Patthey ; H. M. Ronnow ; J. van den Brink ; T. Schmitt
Nature Publishing Group (NPG)
Published 2012Staff ViewPublication Date: 2012-04-24Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsPublished by: -
3Articles: DFG German National LicensesPinsard-Gaudart, L. ; Surynarayanan, R. ; Revcolevschi, A.
[S.l.] : American Institute of Physics (AIP)
Published 2000Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: The double perovskite Ca2FeMoO6 is a poor metal which orders magnetically at 345 K. The 57Fe Mössbauer hyperfine field and isomer shift at 4.2 K (48 T and 0.70 mm/s relative to α-Fe) indicate an Fe3+ configuration 3d5↑ which is strongly hybridized with the Mo 4d↓t2g orbitals. The saturation magnetization of 3.6μB/formula is consistent with neutron diffraction measurements which indicate iron and molybdenum moments of 4.0(1) and −0.2(3)μB per iron or molybdenum, respectively. The sample exhibits approximately 6% cation disorder relative to the ideal NaCl-type order of Fe and Mo in the double perovskite structure. © 2000 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
4Articles: DFG German National LicensesAnane, A. ; Dupas, C. ; Le Dang, K. ; Renard, J. P. ; Veillet, P. ; de Leon Guevarra, A. M. ; Millot, F. ; Pinsard, L. ; Revcolevschi, A.
[S.l.] : American Institute of Physics (AIP)
Published 1996Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: Single crystals of La1−xSrxMnO3 with x ranging from 0.06 to 0.42 have been investigated by various techniques: resistivity and magnetoresistance, superconducting quantum interference device magnetometry, and 55Mn nuclear magnetic resonance. In addition, for two Sr concentrations, x=0.13 and 0.25, the I(V) characteristic of the oxide-metal junction has been measured versus temperature. Semiconductor-metal transition occurring just below the Curie temperature Tc was observed for x≥0.175 whereas, for x≤0.15, the crystals exhibits only semiconducting behavior, in agreement in the previous studies. These transport properties are closely connected with the electron transfer mediated by the double exchange interaction between Mn3+ and Mn4+, as revealed by 55Mn spin-echo experiments. A cusp in the magnetoresistance (MR) was observed near Tc for the crystals with x≥0.13 with typical maximum resistivity ratio R(0)/R(10 T)≈10; for the sample with x=0.1, the huge MR persists well below Tc≈140 K, which is probably due to a noncollinear spin configuration. The I(V) characteristic of the oxide-aluminum junction is strongly dependent on temperature and applied magnetic field. In the semiconducting phase, a nonlinear behavior reminiscent to that of a strongly doped dirty semiconductor is observed. © 1996 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
5Articles: DFG German National LicensesPalme, W. ; Ambert, G. ; Boucher, J. P. ; Dhalenne, G. ; Revcolevschi, A.
[S.l.] : American Institute of Physics (AIP)
Published 1996Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: Electron spin resonance on single crystals of the spin-Peierls compound CuGeO3 has been performed in magnetic fields up to 17 T in the temperature range 1.8–20 K. Using far-infrared laser frequencies of 245 and 525 GHz we could observe resonance conditions in the three different magnetic phases, i.e., the uniform, the dimerized, and the incommensurate phases for a magnetic field applied parallel to the a axis of the crystal. So for the first time data on electron spin dynamics in the incommensurate phase are reported for fields far from the transition to the dimerised phase. Striking effects concerning the g factor, linewidth, and hysteresis are observed. © 1996 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
6Articles: DFG German National LicensesRenard, J. P. ; Le Dang, K. ; Veillet, P. ; Regnault, L. P. ; Dhalenne, G. ; Revcolevschi, A.
[S.l.] : American Institute of Physics (AIP)
Published 1996Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: The effect of substitution of Si to Ge in CuGe1−xSixO3 single crystals has been studied by magnetic susceptibility, Cu nuclear magnetic resonance, and neutron scattering measurements. The phase diagram in the (x,T)-plane is characterized by an initial rapid decrease of the spin-Peierls temperature, TSP, on increasing x and by the occurrence of a three-dimensional long range ordered antiferromagnetic phase at T=TN in the range 0.005≤x≤0.05. This phase diagram is qualitatively discussed. The neutron scattering data for x=0.007 show that the dimerization which takes place below TSP is not suppressed below TN. © 1996 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
7Articles: DFG German National Licensesvan Loosdrecht, P. H. M. ; Boucher, J. P. ; Martinez, G. ; Dhalenne, G. ; Revcolevschi, A.
[S.l.] : American Institute of Physics (AIP)
Published 1996Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: Raman spectra of the magnetic fluctuation spectrum of CuGeO3 are presented for 4〈T〈300 K and B≤20 T. For B=0 the results show good agreement with theoretical expectations for a one-dimensional isotropic Heisenberg antiferromagnet which exhibits a spin–Peierls transition. In the presence of a magnetic field the phase transition to the incommensurately modulated phase is observed around B=12.8 T at T=4.2 K. The spectra obtained in the high field phase clearly show evidence for a well-defined spin fluctuation spectrum, which appears to present an intermediate case between the dimerized phase and the short-range order regime of the uniform phase. © 1996 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
8Articles: DFG German National LicensesAnane, A. ; Dupas, C. ; Le Dang, K. ; Renard, J. P. ; Veillet, P. ; Pinsard, L. ; Revcolevschi, A.
Woodbury, NY : American Institute of Physics (AIP)
Published 1996Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: Substitution of magnesium for manganese in mixed perovskite La1−xSrxMnO3was found to reduce the electrical conductivity and the Curie temperature Tc. A remarkable jump in the resistivity ρ was observed in the 6% Mg-doped crystal with x=0.175. This sample remains semiconducting at low temperatures, contrary to the Mg-free crystal. The abrupt change of ρ reflects a first-order structural transition at a temperature Ts just below Tc. An applied magnetic field decreased Ts, leading to an enhancement of the magnetoresistance between Ts (0) and Ts (H). The microscopic properties of Mn3+ and Mn4+ ions due to Sr2+and Mg2+ substitutions were illustrated by 55Mn nuclear magnetic resonance study. © 1996 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
9Articles: DFG German National LicensesRückamp, R. ; Windt, M. ; Reutler, P. ; Zobel, C. ; Lorenz, T. ; Freimuth, A. ; Revcolevschi, A. ; Grüninger, M.
[s.l.] : Nature Publishing Group
Published 2002Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] One challenge in condensed-matter physics is the experimental confirmation of a new kind of elementary excitation — orbital waves, or orbitons, which are predicted to exist in an orbitally ordered state. Saitoh et al. have observed three peaks at 160, 144 and 126 meV in the Raman ...Type of Medium: Electronic ResourceURL: -
10Articles: DFG German National LicensesStaff View
ISSN: 0921-4526Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: PhysicsType of Medium: Electronic ResourceURL: -
11Articles: DFG German National LicensesStaff View
ISSN: 0921-4534Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: PhysicsType of Medium: Electronic ResourceURL: -
12Articles: DFG German National LicensesTorron, C. ; Diaz, A. ; Jegoudez, J. ; Pomar, A. ; Ramallo, M.V. ; Revcolevschi, A. ; Veira, J.A. ; Vidal, F.
Amsterdam : ElsevierStaff ViewISSN: 0921-4534Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: PhysicsType of Medium: Electronic ResourceURL: -
13Articles: DFG German National LicensesBianconi, A. ; Budnick, J. ; Chamberland, B. ; Clozza, A. ; Dartyge, E. ; Demazeau, G. ; De Santis, M. ; Flank, A.M. ; Fontaine, A. ; Revcolevschi, A. ; Raveau, B. ; Michel, C. ; Otter, F.A. ; Tolentino, H. ; Jegoudez, J. ; Lynds, L.L. ; Lagarde, P.
Amsterdam : ElsevierStaff ViewISSN: 0921-4534Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: PhysicsType of Medium: Electronic ResourceURL: -
14Articles: DFG German National LicensesElectron-position momentum distribution measurements of high-T"c superconductors and related systemsWachs, A.L. ; Turchi, P.E.A. ; Howell, R.H. ; Jean, Y.C. ; Fluss, M.J. ; West, R.N. ; Kaiser, J.H. ; Rayner, S. ; Revcolevschi, A. ; Haghighi, H. ; Merkle, K.L. ; Wang, Z.Z.
Amsterdam : ElsevierStaff ViewISSN: 0921-4534Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: PhysicsType of Medium: Electronic ResourceURL: -
15Articles: DFG German National LicensesStaff View
ISSN: 0022-0248Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Chemistry and PharmacologyGeosciencesPhysicsType of Medium: Electronic ResourceURL: -
16Articles: DFG German National LicensesStaff View
ISSN: 0022-0248Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Chemistry and PharmacologyGeosciencesPhysicsType of Medium: Electronic ResourceURL: -
17Articles: DFG German National LicensesStaff View
ISSN: 0022-0248Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Chemistry and PharmacologyGeosciencesPhysicsType of Medium: Electronic ResourceURL: -
18Articles: DFG German National LicensesStaff View
ISSN: 0022-0248Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Chemistry and PharmacologyGeosciencesPhysicsType of Medium: Electronic ResourceURL: -
19Articles: DFG German National LicensesStaff View
ISSN: 0022-0248Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Chemistry and PharmacologyGeosciencesPhysicsType of Medium: Electronic ResourceURL: -
20Articles: DFG German National LicensesStaff View
ISSN: 0022-0248Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: Chemistry and PharmacologyGeosciencesPhysicsType of Medium: Electronic ResourceURL: