Abstract 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.

中文翻译：

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Ce-Mn掺杂M型SrFe12O19六方铁氧体的溶胶-凝胶自燃法的结构和磁性研究

摘要 具有化学式 Sr1−xCexFe12−yMnyO19 (x = 0.000, 0.025, 0.050, 0.075, and y = 0.00, 0.25, 0.50, 0.75) 的 M 型六方铁氧体是通过自燃技术制备的 我们观察了稀土元素的取代对 M 型六方铁氧体的结构和磁性能的影响。分别采用扫描电子显微镜 (SEM)、X 射线衍射 (XRD) 策略对样品的显微照片和结构进行了系统研究。通过振动样品磁强计（VSM）研究了所有样品的磁性。观察到饱和磁化强度（Ms）和剩磁（Mr）值随着稀土离子取代度的增加而下降。这种减少可能是由于自旋倾斜和磁稀释导致超级交换相互作用的错位。具有几百奥斯特矫顽力值的合成样品显示出软磁行为。合成的样品可用于磁记录介质和微波吸收材料。