Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1814281 | Physica B: Condensed Matter | 2007 | 4 Pages |
Abstract
Bulk polycrystalline layered perovskite sample La2Sm0.4Sr0.6Mn2O7 was prepared by the conventional solid-state reaction technique. Temperature dependence of magnetization measurements in the zero-field-cooled and field-cooled conditions with an applied magnetic field of 100Â Oe indicates that layered manganite La2Sm0.4Sr0.6Mn2O7 undergoes a paramagnetic to ferromagnetic transition at Curie temperature Tcâ¼355Â K. The magnetic transition temperature (Tc) is much higher than metal-insulator transition temperature (Tp) obtained from temperature dependence resistivity measurement. The anisotropic exchange interaction may be one of the reasons resulting in a large deviation between Tc and Tp. Field dependence of magnetization measurements showed a high value of magnetization (62Â emu/g at 5Â K and 42Â emu/g at 300Â K) in an applied magnetic field of 1Â T. At 78Â K, a sharp increase of magnetoresistance was observed at low magnetic fields followed by a weak and linear dependence at high fields.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
M.A. Basith, Sk. Manjura Hoque, Md. Shahparan, M.A. Hakim, M. Huq,