Magnetic properties of lead ferrite nanoparticles prepared by the polymerized complex method

Effect of Ni2+substitution on the Structural, Magnetic and Dielectric Properties of PbFe12-xNixO19 Nanoparticles

“…Among them, M-type hexaferritehas attracted more attention than others because of its application in permanent magnet, microwave devices, and high-density magnetic recording media, particularly for perpendicular magnetic recording [2][3][4]. In addition, these materials are well known because of excellent chemical stability, corrosion resistivity, large saturation magnetization and magnetic coercivity, high Curie temperature, good thermal durability, and mechanical hardness [5][6][7][8][9][10].In recent years, many attempts have been made to enhance the structural, dielectric and magnetic properties of lead hexaferrite.One such attempt was to use the substitution of cations such as Cr 3+ , Al 3+ , Ga 3+ , and Co 2+ for Fe 3+ sites of hexaferrites to enhance the above mentioned properties [7,11,12].…”

“…Ni is a good candidate for the substitution of Fe in lead hexaferrites due to similar ionic radii and electronic configuration of Ni and Fe [19]. Many preparation conditions have been developed to synthesize nanoparticles of M-type hexaferrite, such as compositions, annealing temperatures and times, atmospheres, types and quantities of dopants, heat treatment, and different preparation methods, including co-precipitation, glass crystallization, and the sol-gel methods [2,20].…”

Fabrication of PbFe12O19 nanoparticles and study of their structural, magnetic and dielectric properties

“…M-type hexaferrites are well known and have been used for many years in the electrical, magnetic, dielectric and electronic industries [3]. The unit cell of Lead hexaferrite (PbFe 12 O 19 ) contains two formula units; comprising ten hexagonally closed-packed oxygen layers stacked along the hexagonal basal plane (c-axis).The divalent ion, Pb 2+ , is substituted for an oxygen atom at every fifth layer and Fe 3+ ions are distributed on five different crystallographic sites [4,5]. The structural, magnetic, and dielectric properties of hexaferrites are very much sensitive to methodology adopted and conditions synthesis such as composition, annealing temperature and annealing time, atmosphere, heat treatment and operational procedures [6,7,8,9].…”

Coercivity Enhancement of Hexagonal Ferrites

“…Wet routes such as sol-gel and self-combustion methods have been successful in producing homogeneous nanosized ferrite crystallites at much lower calcination temperatures than other methods [5,6]. It is widely accepted that calcination temperature is closely related to grain size, secondary phases, site occupancy, magnetocrystalline anisotropy and coercivity.…”