Enhanced magneto-optical Kerr effects in nanocrystalline Sc-doped CoFe2O4 thin films
✍ Scribed by Biao Zhou; Yawen Zhang; Chunsheng Liao; Chunhua Yan; Liangyao Chen; Songyou Wang
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- English
- Weight
- 193 KB
- Volume
- 126
- Category
- Article
- ISSN
- 0038-1098
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✦ Synopsis
Nanocrystalline CoFe 22x Sc x O 4 ðx ¼ 0 -0:4Þ thin films were prepared on silicon substrates at reduced temperature by a solgel process, and the doping effects of scandium on the microstructure, magnetism and polar magneto-optical Kerr effects of the as-deposited films were examined. It was shown that the intensities of both of the Kerr rotation peaks increase with the doping content x of Sc 3þ . The increase for the peak at 540 nm is due to the decrease of the electrostatic polarization of O 22 resulting from the relatively large radius of Sc 3þ , and that for the peak at 620 nm was a result of the migration of Co 2þ from octahedral to tetrahedral sites in the presence of the dopant of Sc 3þ .