[PDF] Top 20 Lattice, magnetic excitations and their coupling in multiferroic materials

... The multiferroic Multiferroics, dened as the multifunctional materials in which two or more kinds of fundamental ferroicities coexist, have became one of the hot topics of condensed matter physics ... Voir le document complet

... used in industry and have huge potential for novel device applications thanks to the rich physical behaviour displayed in these ...new lattice mode couplings that can provide exactly this ... Voir le document complet

... goes in the same direction as two other first- principles approaches, namely, ...ferromagnetic and the disor- dered paramagnetic states. In this paper, we show explicitly how temperature reduces the ... Voir le document complet

... magnetism in matter, which is routinely used to investigate diverse structures and phase diagrams in magnetic materials [ 1 ...] and those possessing competing interactions may ... Voir le document complet

... new multiferroic compounds exhibiting a strong magneto-electric coupling has aroused great interest since the beginning of the century, justified both by the fundamental issues involved and the ... Voir le document complet

... 1. MULTIFERROIC BIF EO 3 Exchange-striction For a one-dimensional system, the Peierls' theorem states that a one-dimensional equally spaced chain with one electron per ion is ...the lattice where every ion ... Voir le document complet

... reported in Ref [ ��� ], which indicates that at least for low temperatures there is no coupling between the ionic vibrations and the electronic ...explore in this ...present in the ... Voir le document complet

... Strong coupling between magnetism and electricity in matter has become a central issue of condensed- matter physics from both fundamental and technological points of ...view. In ... Voir le document complet

... responses. In fact the efficient use of the "2n+1" theorem [8], using only by-products of a first-order perturbation calculation, in principle gives the second and third-order derivatives of ... Voir le document complet

... follows. In Sec. II A we present a model of the ferromagnetic superconductor and review the result for the magnetic excitations spectrum in the Meissner state (see ...dynamics. ... Voir le document complet

... ion and the material is important for two reasons: First, such kind of interaction occurs directly during the nuclear reactor operation: Due to the nuclear reactions, the charged particles (for example, the ... Voir le document complet

... hydrogel and therefore smaller than the sum of the osmotic pressures of the two components ...cross-term in the total osmotic pressure, we can conclude on the existence of attractive interactions between ... Voir le document complet

... holes and electrons become 33 and 880 meV ...(Cs) and rotational strain (MA) can cooperate to small polaron formation indicates that the best way to reduce polaron formation, would be to use a larger ... Voir le document complet

... Introduction Magnetic fields are found to occur in a wide variety of stars, including pre-main se- quence T Tau stars and Herbig AeBe stars, upper main sequence O, B and A stars, rapidly ... Voir le document complet

... deposit and dissemination of sci- entific research documents, whether they are pub- lished or ...teaching and research institutions in France or abroad, or from public or private research ... Voir le document complet

... Figure 1.1: This schematic emphasizes the interconnections between structure, properties, processing and performance. The defect placed at the center of the pyramid can hav[r] ... Voir le document complet

... desired magnetic field in each ...the magnetic field of a TLA in ...loops and the magnetic field of a TLA is the superposition of fields due to each ...the magnetic field ... Voir le document complet

... only in the P state whereas it shows a curious nonlinear dependence in the AP state that cannot be related to the linewidth ...current and on voltage are compared 共Figs. 8 and 9 ...smaller ... Voir le document complet

... (b) and (c) The Coulomb interaction between electrons is included as in ...electron and Mn .... In ususal conditions (see Ref. 15 ) both the OPW and IPW propagate below the SF-SPE ... Voir le document complet

... studied and from comparison to available experimental band- gaps, we confirm the subtle interplay between SOC, many-body effects and structural ...structure and in turn to the band-gap. ... Voir le document complet