Microstructure and magnetic microstructure of La + Co doped strontium hexaferrites

Structural, dielectric and magnetic properties of Cr–Zn doped strontium hexa-ferrites for high frequency applications

“…From the viewpoint of microwave devices, ferrites are used into an alternating magnetic field because of their high electrical resistivity, low eddy current loss and excellent magnetic property in high frequency as compared with metal magnetic materials. M-type hexa-ferrites are more useful, for high frequency (GHz) applications than soft ferrites due to their high magneto crystalline anisotropy which resulted in very low residual losses [9][10][11][12]. Several synthesis techniques have been used to prepare and tailor the properties of strontium hexa-ferrite nanoparticles [13][14][15][16][17].…”

Magnetic properties of Sn–Mg substituted strontium hexaferrite nanoparticles synthesized via coprecipitation method

“…Among them, coprecipitation as a simple and low cost method has been recently attracted much attention [11,12]. For improvement of magnetic properties of strontium hexaferrites the substitution of several cations such as Al 3+ -Ga 3+ , Zr 4+ -Zn 2+ , Zr 4+ -Ni 2+ at five interstitial sites of hexaferrite have been investigated [13][14][15][16]. In the case of M-type hexaferrites, it was known that the crystalline anisotropy could be reduced by Sn 4+ -Zn 2+ , Sn 4+ -Co 2+ , Sn 4+ -Mn 2+ and Sn 4+ -Ni 2+ substitution of Fe 3+ ions [17][18][19].…”

Magnetic properties of chemical coprecipitated Sr0.8La0.2Fe11.8Co0.2O19 powders

“…According to micromagnetic calculations [4,5], the critical diameter for single domain particles is estimated above 600 nm, so the material under study can be characterized as a single domain particle powder.…”

“…Their magnetic properties are qualitatively interpreted based on micromagnetic models, but there is still some research interest [2][3][4][5][6][7], focused on the development of a cheaper manufacturing process that will not affect the enhanced magnetic properties of these materials.…”