APPLIED MAGNET TECHNOLOGY
 

Laboratory Of Ferromagnetic Alloys of The Institute Of Metal Physics, Russia

Ural Division of Russian Academy of Science

Field of activity:

  • Synthesis of new multi-component ferromagnetic alloys based on RE - 3d-metal inter-metallic compounds
  • Investigations of fundamental and applied problems of magnetism:
    • Relationship of structure and magnetic properties of multi component RE-3d metals compounds;
    • Structural-physical fundamentals of technology
  • Effect of impurities of hydrogen on the magnetic properties of rare earth compounds of Laves phase type
  • Elaborations of nano-composite high-coercive materials, prepared by melt spinning and methods of intensive plastic deformation
  • Relationship of crystalline and domain structure in ordered alloys
  • Structure and magnetic properties of rare earth manganite

Main projects:

  • Permanent magnets with low values of temperature coefficient of induction
  • High-strength semi-hard magnetic materials for high-speed hysteresis-reluctance motors
  • Original method of manufacturing anisotropic high coercivity powders based on Nd-Fe-B system for bonded permanent magnets
  • Method of manufacturing hot-rolled strip of alloys based on inter-metallic rare earth compounds
  • Method of preparation, analysis and development of optimal magnet systems of given magnetic configuration
  • Development of magnetic systems (e.g. for focusing electron-beam tubes, nuclear magnetic resonance, laser optical electronics, and others)

Some effective results:

  • Discovery (1990) of new monoclinic lattice phase (Z-phase) within R-Fe-M systems, where R-rare earth, M - V, Ti, Re, Si. Studies of structure and magnetic property features of Z - phase (R3(Fe,M)29): its availability as permanent magnet materials
  • Discovery of gigantic anisotropy of spontaneous magnetization both rare earth - and 3d - sub-lattices: theoretical interpretation of the phenomenon
  • Discovery of phenomenon of spontaneous R(Fe,Co)2 powdered absorption of small impurities of hydrogen from atmosphere at normal pressure and its ordering in crystal lattice followed by giant rhombohedral lattice distortion and induced uni-axial magnetic anisotropy

The laboratory has following equipment:

  • Processing equipment for synthesis of alloys and compounds, various heat treatments, rolling, crushing and grinding, pressing in magnet field, and manufacturing of liquid quenched strips and powders
  • Equipment for X-ray analysis in the range of 4.2 - 1000 K
  • Electron and optical microscopy
  • Nuclear magnetic and gamma resonance spectrometers
  • Equipment for investigation of various physical properties: dilatometry and measurements of electrical resistivity, including at impact of high pressure
  • Equipment for wide spectrum of magnetic measurements and investigations: vibrating magnetometers, permeagraphs, squid-magnetometer and others

 


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