Abstract
A study of the relationship between structural parameters and principal magnetic characteristics of nanosized powders of hexagonal ferrimagnetics produced via mechanoactivation has been carried out. The models describing the influence of the size effects on temperatures of magnetic phase transformations, saturation magnetization and magnetic anisotropy of similar materials are discussed.
Highlights
In the last few years the behavior features of the basic magnetic properties of polycrystalline and powdered magnetics with submicron and nanosized crystals and particles has drawn the attention of researchers
Aside the well-known effects of material transition into single-domain and superparamagnetic states, other magnetic effects are observed connected to the increasing role of surface effects in small size magnetic particles, namely, the fluctuations of exchange interactions for atoms belonging to the surface and disturbed in the near-surface layer, the change of the local symmetry of the crystalline field and, of the magnetic crystallographic anisotropy (MCA)
The present paper gives the findings of the investigation into the influence of size effects on the magnetic properties of ultradisperse powders of oxide ferrimagnetics with a hexagonal structure produced via mechanoactivation
Summary
In the last few years the behavior features of the basic magnetic properties of polycrystalline and powdered magnetics with submicron and nanosized crystals and particles has drawn the attention of researchers. Aside the well-known effects of material transition into single-domain and superparamagnetic states, other magnetic effects are observed connected to the increasing role of surface effects in small size magnetic particles, namely, the fluctuations of exchange interactions for atoms belonging to the surface and disturbed in the near-surface layer, the change of the local symmetry of the crystalline field and, of the magnetic crystallographic anisotropy (MCA). The present paper gives the findings of the investigation into the influence of size effects on the magnetic properties of ultradisperse powders of oxide ferrimagnetics with a hexagonal structure produced via mechanoactivation. During mechanoactivation of powders of multisublattice oxide ferromagnetic compounds dispersion may be followed by some other effects capable of influencing the magnetic properties of the material. One of the primary research goals is selection of activation modes, under which mainly grinding of particles of the powdered materials takes place, with the other effects playing a small part
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
