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Title: | Interface effects on magnetoresistance and magnetic-field-reduced Raman scattering in magnetite | Authors: | Li, J.-M. Huan, A.C.H. Wang, L. Du, Y.-W. Feng, D. |
Issue Date: | 1-Mar-2000 | Citation: | Li, J.-M.,Huan, A.C.H.,Wang, L.,Du, Y.-W.,Feng, D. (2000-03-01). Interface effects on magnetoresistance and magnetic-field-reduced Raman scattering in magnetite. Physical Review B - Condensed Matter and Materials Physics 61 (10) : 6876-6878. ScholarBank@NUS Repository. | Abstract: | Our work demonstrates that magnetoresistance of the polycrystalline magnetite decreases with the reduction in average grain size, suggesting that the spin-dependent transporting phenomenon is associated with the interface microstructure. Also, the reducing peak intensity of the Raman spectra near 660 cm-1 was observed while its full width at half-maximum remains invariable, as applied a field. It demonstrates that the phonon mode becomes softening upon applying a field. A possible physical explanation is proposed that magnetic field-induced the enhanced electron-electron correlation. This is consistent with the previous results about magnetite. ©2000 The American Physical Society. | Source Title: | Physical Review B - Condensed Matter and Materials Physics | URI: | http://scholarbank.nus.edu.sg/handle/10635/96958 | ISSN: | 01631829 |
Appears in Collections: | Staff Publications |
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