Sh. M. Aliev

Remanent Magnetizations of Gadolinium Iron Garnet Sublattices near the Compensation Point

Gadolinium iron garnet Gd3Fe5O12 has been studied near the compensation point Tcm by Mössbauer spectroscopy. It has been shown that the remanent magnetizations of the ferrite sublattices abruptly increase near Tcm. The phenomenon has been explained by the increase in the domain sizes in the ferrite with approaching Tcm. The Mössbauer spectroscopy can be used to investigate the magnetization and magnetization reversal processes in individual sublattices of a ferrimagnet.

A method for determining the texture scattering angle and the relative remanent magnetization of anisotropic permanent magnets

A Mössbauer-spectroscopy method for determining the texture scattering angle and the relative remanent magnetization of anisotropic permanent magnets is described. The method has been experimentally verified on powder-based permanent magnets made of barium ferrite BaFe12O19.

A magnetic field sensor based on the mechanoelectric effect in semiconductors

A highly sensitive magnetic field transducer based on the mechanoelectric effect in semiconductors is proposed.

A study of the domain structure of ferrites in the vicinity of the compensation point by Mössbauer spectroscopy

A single-crystal sample of gadolinium ferrite garnet Gd3Fe5O12 was studied by Mössbauer spectroscopy near compensation point Tcm (Tcm = 286 K). The relative intensities of absorption lines in 57Fe Mössbauer spectra allow it to be concluded that the domain sizes in ferrite grow with the temperature approaching Tcm, with domain structure in the sample disappearing at compensation point Tcm.

A method for determining a uniaxial magnetic anisotropy constant of monodomain particles of powdered permanent magnets

A method for determining the uniaxial magnetic anisotropy constant of monodomain particles of powdered permanent magnets is based on the Mössbauer spectroscopy. The method is experimentally verified on a powdered permanent magnet made of barium ferrite BaFe12O19.

Determination of the magnetic anisotropy constant in microparticles of powder-based permanent magnets by Mössbauer spectroscopy

A new Mössbauer technique for determining the uniaxial magnetic anisotropy constant in microparticles of powder-based permanent magnets has been developed and experimentally verified.

A special feature in the magnetic moment orientation of highly magnetic phase particles in magnetically hard Fe-Co-Ni-Al alloys

Orientation of the magnetic moments of the particles of a highly magnetic phase in a magnetically hard Fe-Co-Ni-Al alloy (YuN15DK25BA grade) was studied by Mössbauer spectroscopy. The results indicate that the magnetic moments, instead of being oriented along the axes of anisotropy of the particles, fluctuate with an average amplitude of θ=45° and a characteristic time τs ≈ 6×10−9 s relative to these axes.

Method of determining the single-domain property of magnetic powder particles

A method of determining the single-domain property of magnetic powder particles based on Mossbauer spectroscopy is proposed and checked experimentally.