Structural and magnetic studies of Ce-Mn doped M-type SrFe12O19 hexagonal ferrites by sol-gel auto-combustion method

• Published in: Journal of magnetism and magnetic materials Vol. 473; pp. 464 - 469
• Main Authors: Yasmin, Nazia, Abdulsatar, Sidra, Hashim, Muhammad, Zahid, Maria, Fatima Gillani, Saher, Kalsoom, Ambreen, Naeem Ashiq, Muhammad, Inam, Iqra, Safdar, Muhammad, Mirza, Misbah
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.03.2019
• Subjects: Ce-Mn substitution; Sol-gel auto-combustion; Strontium hexaferrite; Structural and magnetic properties; Ce-Mn substitution; Strontium hexaferrite; Sol-gel auto-combustion; Structural and magnetic properties
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2018.10.076

•Sol-gel autocombustion method is used to synthesize the samples.•XRD results revealed the hexagonal structure with no secondary phase.•The SEM images showed non-homogeneous grain distribution with some agglomeration.•The magnetic calculations demonstrated the soft magnetic behavior of Ce-Mn doped samples. The M-type hexagonal ferrites having the chemical formula Sr1−xCexFe12−yMnyO19 (x = 0.000, 0.025, 0.050, 0.075, and y = 0.00, 0.25, 0.50, 0.75) are fabricated via sol-gel auto combustion technique. We observed the effect of substitution of rare earth elements on structural and magnetic properties of M-type hexagonal ferrites. Scanning electron microscope (SEM), X-ray diffraction (XRD) strategies were applied for the systematical investigation of micrographs and structures of the samples respectively. Magnetic properties of all the samples were investigated through vibrating sample magnetometer (VSM). It is observed that the values of saturation magnetization (Ms) and remanence (Mr) decline with increasing the rare earth ions substitution. This decrease may follow the spin canting and magnetic dilution which results in dislocation of super exchange interactions. Synthesized samples having the value of coercivity of few hundred Oersteds show soft magnetic behavior. The synthesized samples may be applied for magnetic recording media and microwave absorbing materials.