Shinde V S, Dahotre S G, Singh L N
Department of Physics, K.E.S. Anandibai Pradhan Science College, Nagothane M.S., India.
Department of Physics, Dr. Babasaheb Ambedkar Technological University, Lonere M.S., India.
Heliyon. 2020 Jan 17;6(1):e03186. doi: 10.1016/j.heliyon.2020.e03186. eCollection 2020 Jan.
Al substituted M type Ca hexaferrite with composition CaAlFeO (x = 0, 0.2, 0.4, 0.6, 0.8) were synthesized by sol gel auto combustion method. The prepared samples were characterized by XRD, SEM, FTIR and VSM. X ray diffraction study shows that the with increasing aluminum ion concentration lattice parameter a decreases from 5.87 to 5.83 while the lattice parameter c decreases from 22.15 Å to 22.00 Å are well within the range of M type of hexaferrite. The crystallite size of the particles decreases from 74.36nm to 62.12nm are suitable for magnetic recording. Morphology of the particles from SEM images was hexagonal platelet. The absorption band between 580 and 440cm in FTIR confirm the formation of hexaferrite. The magnetic properties of the samples changes with Al ion substitution make the material suitable for low density longitudinal and perpendicular magnetic recording.
采用溶胶 - 凝胶自燃烧法合成了Al取代的M型Ca铁氧体，其组成式为CaAlFeO（x = 0, 0.2, 0.4, 0.6, 0.8）。通过X射线衍射（XRD）、扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）和振动样品磁强计（VSM）对制备的样品进行了表征。X射线衍射研究表明，随着铝离子浓度的增加，晶格参数a从5.87 减小到5.83 ，而晶格参数c从22.15 Å减小到22.00 Å，均在M型铁氧体的范围内。颗粒的微晶尺寸从74.36nm减小到62.12nm，适合磁记录。扫描电子显微镜图像显示颗粒形态为六角形片状。傅里叶变换红外光谱中580至440cm之间的吸收带证实了铁氧体的形成。样品的磁性能随Al离子取代而变化，使该材料适用于低密度纵向和垂直磁记录。
