Enhanced magneto-optical Kerr effects and decreased Curie temperature in Co–Mn ferrite thin films

Zhou, Biao; Zhang, Ya-Wen; Liao, Chun-Sheng; Cheng, Fu-Xiang; Yan, Chun-Hua; Chen, Liang-Yao; Wang, Song-You
September 2001
Applied Physics Letters;9/17/2001, Vol. 79 Issue 12, p1849
Academic Journal
Co–Mn ferrite thin films were prepared on a monocrystalline silicon substrate by a sol–gel process, and the influences of Mn[sup 3+] on the microstructure, magnetism, and polar magneto-optical Kerr effects of the as-deposited films were examined. The results reveal that doping of Mn[sup 3+] ions could effectively lower the T[sub C] of Co ferrite, and the Mn[sup 3+] substitution caused enhanced Kerr rotations due to the migration of Co[sup 2+] from the octahedral site to the tetrahedral site. A maximum rotation of 2.7° was produced by the stress in the metastable cubic structure of CoFe[sub 0.6]Mn[sub 1.4]O[sub 4] films. © 2001 American Institute of Physics.


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