Bibliographic Details
| Title: |
Structure, magnetic and magnetoresistive properties of La0.7Sr0.3Mn1−x Sn x O3 samples (0≤ x ≤0.20) |
| Authors: |
Kallel, N.1,2 nabil.kallel@fsm.rnu.tn, Fröhlich, K.3, Pignard, S.2, Oumezzine, M.1, Vincent, H.2 |
| Source: |
Journal of Alloys & Compounds. Aug2005, Vol. 399 Issue 1/2, p20-26. 7p. |
| Subjects: |
Electric resistance, Magnetic fields, Magnetoresistance, Ions |
| Abstract: |
Abstract: Structural, magnetic, and transport properties of polycrystalline La0.7Sr0.3Mn1−x Sn x O3 have been experimentally investigated. Single-phase samples were obtained in the range 0≤ x ≤0.20 by a conventional solid-state reaction method in air. The substitution of Sn4+ at the Mn site results in a significant lattice expansion, a reduction in the Curie temperature T C and in the magnetic moment per Mn ion. In addition, gradual changes in the resistivity behaviour are observed in the Sn-doped samples leading to an enhancement of the magnetoresistance at low doping ratio. The results are analysed in relation to the variation in the Mn3+–O2−–Mn4+ network and to the magnetic disorder caused by the presence of the large and nonmagnetic Sn4+ ions in the Mn sublattice. [Copyright &y& Elsevier] |
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| Database: |
Engineering Source |
