Synthesis and Study of the Lanthanum Substitution in the Lead M-Type Hexaferrite

Effect of pb on the magnetic interactions of the M-type hexaferrites

“…Prior to sintering, the powders were mixed in a stoichiometric ratio with an excess of 33% of lead oxide and pressed into pellets. The added excess of lead oxide was previously calculated to obtain the pure phases, due that lead is lost during the sintering at high temperature, in this sense, the heat-treatment temperature was kept constant at 1200°C for samples (a) and (b), at 1250°C for sample (c) and at 950°C for sample (d) [11][12][13], all samples were calcined during two hours.…”

“…When Sr and Ba hexaferrites are prepared under the same conditions, their crystalline structures and morphologies remain without important changes [7][8][9][10][11][12][13], however, when Pb is present in the hexaferrite, the variations in their magnetic properties are remarkable. Previous works highlight that Pb-hexaferrite has less coercivity and remanence than Ba or Sr hexaferrites.…”

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

“…For example, Albanese et al, synthesized, [16] They found that the saturation magnetization (σS) at 0 K falls with increasing x, from 20 μB for x = 0 to 4.32 μB for x = 6. Guerrero-Serrano et al [17] reported the synthesis and study of the Lanthanum substitution in the lead M-Type Hexaferrite. They observed that the fall of two orders of magnitude in the magnetic coercivity is associated to the change of valence states of the iron cations located nearby of the lanthanum ions due to the substitution.…”