Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1801086 | Journal of Magnetism and Magnetic Materials | 2009 | 4 Pages |
Abstract
Temperature dependence of the magnetic properties of magnetite thin film across the Verwey transition has been investigated. As the temperature is decreased, the magnetization of the film in a fixed field showed a sharp decrease close to the Verwey transition temperature (Tv). The M–H loops of the film have been recorded at various temperatures below and above Tv. It is found that film does not saturate at any temperature and saturation becomes more difficult below Tv. While cooling through Tv, the extrapolated value of magnetization to infinite field (Q), calculated from the numerical fit 4πM=Q [1−(H*/H)1/2], does not show a drop, but the coefficient indicating difficulty in saturation (H*) shows a sharp rise as does the coercivity.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Murtaza Bohra, Shiva Prasad, N. Venketaramani, Naresh Kumar, S.C. Sahoo, R. Krishnan,