Electrical and magnetic properties of chemically derived nanocrystalline cobalt ferrite
作者： N. Sivakumar , A. Narayanasamy , K. Shinoda , C. N. Chinnasamy , B. Jeyadevan
DOI: 10.1063/1.2752098
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摘要: Nanocrystalline cobalt ferrite particles of 8nm grain size were synthesized by coprecipitation technique and subsequently suitably heat treated to obtain higher sizes. The experimentally observed changes in the dc electrical conductivity Curie temperature with treatment have been attributed cation distributions as obtained from Mossbauer extended x-ray absorption fine structure (EXAFS) measurements size. activation energies for conduction determined Arrhenius plots suggest that is due hopping both electrons holes. decrease when increased 8to92nm clearly predominant effect migration some Fe3+ ions octahedral tetrahedral sites, evident in-field EXAFS measurements. But 102 123nm compared 92nm ...
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sci-hub.se 参考文章(29)
Zhenyu Wu, Zhongxing Bao, Li Cao, Cuixia Liu, Qianshu Li, Sishen Xie, Bingsuo Zou, Electrical properties and phase transition of CoFe2O4 nanocrystals under pressure Journal of Applied Physics. ,vol. 93, pp. 9983- 9987 ,(2003) , 10.1063/1.1570950
J. Ding, Y. J. Chen, Y. Shi, S. Wang, High coercivity in SiO2-doped CoFe2O4 powders and thin films Applied Physics Letters. ,vol. 77, pp. 3621- 3623 ,(2000) , 10.1063/1.1328374
L. G. Van Uitert, dc Resistivity in the Nickel and Nickel Zinc Ferrite System The Journal of Chemical Physics. ,vol. 23, pp. 1883- 1887 ,(1955) , 10.1063/1.1740598
V. Blaskov, V. Petkov, V. Rusanov, Ll.M. Martinez, B. Martinez, J.S. Muñoz, M. Mikhov, Magnetic properties of nanophase CoFe2O4 particles Journal of Magnetism and Magnetic Materials. ,vol. 162, pp. 331- 337 ,(1996) , 10.1016/S0304-8853(96)00277-6
J.G. Na, T.D. Lee, S.J. Park, Y.J. Tang, H.L. Luo, Effects of cation distribution on superexchange interaction in cobalt ferrites IEEE Transactions on Magnetics. ,vol. 31, pp. 3970- 3972 ,(1995) , 10.1109/20.489833
Bernard Dennis Cullity, Elements of X-ray diffraction ,(1956)
Y. Suzuki, R. B. van Dover, E. M. Gyorgy, Julia M. Phillips, V. Korenivski, D. J. Werder, C. H. Chen, R. J. Cava, J. J. Krajewski, W. F. Peck, K. B. Do, Structure and magnetic properties of epitaxial spinel ferrite thin films Applied Physics Letters. ,vol. 68, pp. 714- 716 ,(1996) , 10.1063/1.116601
G. A. Sawatzky, F. VAN DER Woude, A. H. Morrish, Cation Distributions in Octahedral and Tetrahedral Sites of the Ferrimagnetic Spinel CoFe2O4 Journal of Applied Physics. ,vol. 39, pp. 1204- 1205 ,(1968) , 10.1063/1.1656224
M Grigorova, HJ Blythe, V Blaskov, V Rusanov, V Petkov, V Masheva, D Nihtianova, Ll M Martinez, JS Munoz, M Mikhov, None, Magnetic properties and Mössbauer spectra of nanosized CoFe2O4 powders Journal of Magnetism and Magnetic Materials. ,vol. 183, pp. 163- 172 ,(1998) , 10.1016/S0304-8853(97)01031-7
C. N. Chinnasamy, B. Jeyadevan, K. Shinoda, K. Tohji, D. J. Djayaprawira, M. Takahashi, R. Justin Joseyphus, A. Narayanasamy, Unusually high coercivity and critical single-domain size of nearly monodispersed CoFe2O4 nanoparticles Applied Physics Letters. ,vol. 83, pp. 2862- 2864 ,(2003) , 10.1063/1.1616655