Nonquasiparticle states in half-metallic ferromagnets

Anomalous magnetic and electronic properties of the half-metallic ferromagnets (HMF) have been discussed. The general conception of the HMF electronic structure which take into account the most important correlation effects from electron-magnon interactions, in particular, the spin-polaron effects, is presented. Special attention is paid to the so called non-quasiparticle (NQP) or incoherent states which are present in the gap near the Fermi level and can give considerable contributions to thermodynamic and transport properties. Prospects of experimental observation of the NQP states in core-level spectroscopy is discussed. Special features of transport properties of the HMF which are connected with the absence of one-magnon spin-flip scattering processes are investigated. The temperature and magnetic field dependences of resistivity in various regimes are calculated. It is shown that the NQP states can give a dominate contribution to the temperature dependence of the impurity-induced resistivity and in the tunnel junction conductivity. First principle calculations of the NQP-states for the prototype half-metallic material NiMnSb within the local-density approximation plus dynamical mean field theory (LDA+DMFT) are presented.Comment: 27 pages, 9 figures, Proceedings of Berlin/Wandlitz workshop 2004; Local-Moment Ferromagnets. Unique Properties for Moder Applications, ed. M. Donath, W.Nolting, Springer, Berlin, 200

Electrohydrodynamics and Convective Diffusion in Solutions of Electrolytes, Superfluid and Polar Liquids

Available from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio

Radiofrequency renal arteries denervation: effectively and safely

Objective. To determine the possibility of radio frequency denervation of the renal arteries (RDN) in the treatment of patients with refractory essential hypertension (GRA). Materials and methods. The study included 57 patients with a diagnosis of the guide RAG. According to the results of surveys conducted by RDA was performed of 25 patients diagnosed with essential RAG. Within 12 months after the procedure was carried out monitoring of clinical blood pressure (BP), BP monitoring (ABPM), and laboratory evaluation of renal function and renal artery ultrasound. Statistical analysis was performed using Statistica 6.1 program, significant differences were recognized when p<0.05. Results. Within 12 months after the RDN with the group there was a significant decrease in blood pressure (p<0.01) according to the data of the clinical measurements, and the results of ABPM. There were no complications in the place of performance of radio-frequency effects or violation of renal excretory function has been reported. According to the results of the analysis, predictors of effectiveness RDN not identified. Conclusion. Radiofrequency denervation of the renal arteries is a safe and effective non-drug methods in complex treatment of refractory essential hypertension