abstract

• This work reports a systematic study of the effect of neodymium (Nd) on the microstructural, magnetic, and structural properties of strontium hexaferrite (SrFe12O19). Neodymium was incorporated during the hexaferrite fabrication using the sol-gel Pechini method. The results show that neodymium is partially incorporated into the hexaferrite crystal structure, allowing the formation of neodymium orthoferrite as a second phase, which dramatically affects the magnetic properties of the hexaferrite. The temperature in the range of 900 to 1100 degrees C and the variation of the neodymium content were two analytical variables that allowed to study the effects of neodymium on the hexaferrite properties. The behavior of the phases and their structural properties were investigated using X-ray diffraction and the Rietveld refinement method. The magnetic properties were obtained using vibrant sample magnetometry, and the microstructural characteristics were analyzed by electron micro-scopy. For the hexaferrite containing up to 2.85 wt%25 of neodymium orthoferrite, the maximum energy product (BHmax) was 35%25 higher than the one showed by the neodymium-free hexaferrite. The increased magnetic properties have been associated with the incorporation of neodymium in the hexaferrite structure and due to the magnetic interactions between the hexaferrite and neodymium orthoferrite.

authors

• Herrera-González A.M.
• Lobo-Guerrero A.
• Pérez-Juache T.J.

publication date

• 2023-01-01

funding provided via

• Consejo Nacional de Ciencia y Tecnologia (CONACyT); DGAPA-UNAM (Universidad Nacional Autonoma de Mexico) 791363; IN113420  Grant

published in

• Journal of Magnetism and Magnetic Materials  Journal

keywords

• Neodymium-doped; Strontium hexaferrite; Rietveld method; Rare earth; Pechini method

Digital Object Identifier (DOI)

• 10.1016/j.jmmm.2023.170985

PubMed ID

start page

end page

volume

• 582

issue