283 citations
- Bulgarian Academy of SciencesBG18 papers
- Georgi Nadjakov Institute of Solid State PhysicsBG13 papers
- Centre National de la Recherche ScientifiqueFR11 papers
- Joint Institute for Nuclear ResearchRU10 papers
- Lyon 1 UniversitéFR9 papers
- Centre de Recherche Astrophysique de LyonFR8 papers
- Observatoire de LyonFR8 papers
- CEA Paris-SaclayFR6 papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR6 papers
- Galaxies, Etoiles, Physique et InstrumentationFR6 papers
- Institute for Nuclear Research and Nuclear EnergyBG6 papers
- Observatoire de ParisFR6 papers
4 papers · 1 filter
Ferrimagnetism of MnV_2O_4 spinel
Naoum Karchev
The spinel MnV_2O_4 is a two-sublattice ferrimagnet, with site A occupied by the Mn^{2+} ion and site B by the V^{3+} ion. The magnon of the system, the transversal fluctuation of…
Towards the theory of ferrimagnetism
N. Karchev
Two-sublattice ferrimagnet, with spin- operators at the sublattice site and spin- operators at the sublattice site, is considered. The…
Two Ferromagnetic Phases in Spin-Fermion Systems
Naoum Karchev
We consider spin-fermion systems which get their magnetic properties from a system of localized magnetic moments being coupled to conducting electrons. The dynamical degrees of fre…
Curie temperature of the two band double exchange model for manganites
Vasil Michev, Naoum Karchev
We consider two-band double exchange model and calculate the critical temperature in ferromagnetic regime (Curie temperature). The localized spins are represented in terms of the S…