A strong magneto-optical activity in rare-earth La3+ substituted M-type strontium ferrites

作者：Hu Feng; Fernandez Garcia Lucia; Liu Xian Song^*; Zhu De Ru; Suarez Marta; Luis Menendez Jose

来源：Journal of Applied Physics, 2011, 109(11): 113906.

DOI：10.1063/1.3587181

M-type strontium ferrites with substitution of Sr2+ by rare-earth La3+ were prepared by conventional ceramic technology. The structure, magnetic properties, and magneto-optical Kerr activity of Sr1-xLaxFe12O19 (x=0, 0.05, 0.10, 0.15, 0.20) were investigated by x-ray diffraction (XRD), vibrating sample magnetometer (VSM), and magneto-optical ellipsometry, respectively. X-ray diffraction showed that the samples sintered at 1290 degrees C for 3 h were single M-type hexagonal ferrites. The magnetic properties were remarkably changed due to the valence change of Fe ions induced by the substitution of La ions. Most significantly, an important magneto-optical activity was induced in the La3+ substituted M-type strontium ferrites around 3 eV.

• 出版日期2011-6-1
• 单位安徽大学