Abstract
The magnetic and conductive properties of polycrystalline La0.5Pb0.5MnO3 containing ∼13at.% of a second phase Pb3Mn6O13, were investigated. The studies reported include measurements of magnetization, electrical resistivity and magnetoresistance, in a temperature range 10 ÷ 400 K and at applied magnetic fields up to 5 Tesla It was found that the sample exhibits a ferromagnetic ordering with relatively low coercive field at room temperature. Measurements of field-cooled and reversed-field-cooled magnetization support models of coexisting magnetic phases in ferromagnetic La-based manganites The resistivity measured exhibits a maximum at ∼ 230 K and a broad shallow minimum at ∼ 20÷25 K. These features are also attributed to the temperature dependence of the magnetic inhomogeneities. Measurements of magnetoresistance show a characteristic giant effect at low temperatures.
| Original language | English |
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| Pages (from-to) | Pr2-359-Pr2-362 |
| Journal | Journal De Physique. IV : JP |
| Volume | 8 |
| Issue number | 2 |
| DOIs | |
| State | Published - Jun 1998 |