CORDIS provides links to public deliverables and publications of HORIZON projects.
Links to deliverables and publications from FP7 projects, as well as links to some specific result types such as dataset and software, are dynamically retrieved from OpenAIRE .
Exploitable results
1. Mr. H. Schmid, Co-ordinator, University of Geneva Single crystals of the magnetoelectric phosphates LiCoPO4 and LiNiPO4 have been grown (part of a Swiss FNRS-project) and studied magnetoelectrically up to 20 T and optically in collaboration with Mr. I. Kornev and the High Magnetic Field Laboratory, Grenoble.
2. Mr. P. Wyder, Max-Planck-Institut für Festkörperforschung, High Magnetic Field Laboratory, Grenoble. The contribution of the Laboratory consisted in putting the high static magnetic field facilities and related know-how at the disposal of the participants.
3. Group of Mr. N.F. Kharchenko, B.I. Verkin Institute for Low Temperature Physics & Engineering, Kharkov, Ukraine. 1) Intermediate magnetic field-sensitive structures have been revealed in the antiferrodistortive Jahn-Teller crystal KDy-molybdate. 2) The H-T-phase diagram has been constructed. 3) The possibility of inducing regular and chaotic motions of crystal lattice excitations by strong microwave fields in a paramagnetic ferroelastic JahnTeller crystal has been demonstrated using KEr-molybdate. 4) Elementary excitations of KDy-, (KY-KEr)- and (CsDy-CsGd)-molybdates have been identified and electron - phonon band interaction has been revealed. 5) In classic antiferromagnetic MnF2 the dichroism, odd in magnetic field, has been revealed in linearly polarised light. 6) The ferroelastic, ferroelectric and optical properties of the magnetoelectric Tb-molybdate crystals have been described theoretically and new magneto-optical effects have been predicted.
4. Group of Mr. B. Ponomarev, Institute of Solid State Physics, Chernogolovka, Russia. 1) The non-linear magnetoelectric effect (and its anisotropy) has been investigated in orthorhombic ferroelectriciferroelastic single crystals of Sm, Gd-, Tb-, Tb/Gd- and Dy/Gd-molybdate in fields up to 20T and down to 0.4K. 2). In Tb-molybdate a sharp jump in the angular dependence of the electric polarisation was observed at 0.4K and constant magnetic field, due to an orientational phase transition between the paramagnetic and antiferromagnetic state. 3) Two new types of magnetoelectric effect have been discovered: The dynamic and the low kinetic magnetoelectric effect. 4) For Tb-molybdate a strong influence of the optical radiation on the electric polarisation was observed. Laser radiation of wavelength 4880 Angstrom generates a green photoluminescence of wavelength 5425 Angstrom with a quantum efficiency of 2O%.
5. Mr. I. Kornev, Department of Physics Engineering, Novgorod State University, Russia. 1) The magnetic, optical and magnetoelectric properties of antiferromagnetic LiCoPO4 have been analysed by phenomenological macroscopic theory and microscopic theory. 2) On single crystals of LiNiPO4 the magnetoelectric effect has been studied in detail near the Néel temperature in magnetic fields up to 20 T. Anomalous temperature dependence of the magnetoelectric susceptibility during the phase transition and the field dependence of the magnetic field induced polarisation were observed. The phase transition is studied using the renormalisation-group technique.
6. Group of Mrs. A. Kadomtseva, Moscow State University, Russia. 1) In the magnetic ferroelectrics RxBi1-xFeO3 (R=La, Nd, Dy) and EuMn2O5 the induced phase transition from the space modulated spin structure (SMSS) to the homogeneous antiferromagnetic state (HAFS) has been investigated. 2) On single crystals of the system (FexCr1-x)2O3 the magnetoelectric effect and magnetic phase transitions have been studied. 3) For x=0.05 a cascade of magnetic field induced magnetic phase transitions was observed, in agreement with the predictions of a "home-made" theory. 4) On crystals of CrFeO3 an unusual phenomenon - weak ferrimagnetism - has been discovered, generated by antisymmetrical exchange interaction of the 3d-ions. 5) On crystals of GaFeO3 a new type of magnetic order - toroidal order - has been discovered experimentally and justified theoretically. The linear magnetoelectric effect of GaFeO3 is stipulated by the toroidal moment and not by magnetostriction.
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