Giant magnetoresistance in La1−xSrxMnOz films near room temperature
- 17 October 1994
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 65 (16) , 2108-2110
- https://doi.org/10.1063/1.112808
Abstract
We report the observation of giant magnetoresistance near room temperature in ferromagnetic films of La1−xSrxMnOz for 0.16≤x≤0.33. For B=5 T, the maximum magnetoresistance ratio [R(0)−R(B)]/R(0) of an annealed film is 60% at 260 K for x=0.2, and 35% at 330 K for x=0.33. Annealed films have higher Curie temperature (Tc), a larger saturation moment and a larger magnetoresistance effect near Tc than do as‐grown films. The temperature dependence of resistivity for all the samples investigated is unusual, activated above Tc and metallic below Tc. This and the giant magnetoresistance are possibly explained by scattering from magnetic polarons which dominate the transport near Tc.Keywords
This publication has 15 references indexed in Scilit:
- Magnetic compounds with perovskite structure IV Conducting and non-conducting compoundsPublished by Elsevier ,2004
- Ferromagnetic compounds of manganese with perovskite structurePublished by Elsevier ,2004
- Thousandfold Change in Resistivity in Magnetoresistive La-Ca-Mn-O FilmsScience, 1994
- Giant negative magnetoresistance in perovskitelike ferromagnetic filmsPhysical Review Letters, 1993
- Influence of intralayer quantum-well states on the giant magnetoresistance in magnetic multilayersPhysical Review Letters, 1993
- The metal-insulator transition in extrinsic semiconductorsAdvances in Physics, 1972
- Conductivity Studies in Europium OxidePhysical Review B, 1972
- Studies of the ionic ferromagnet (LaPb)MnO3. V. Electric transport and ferromagnetic propertiesCanadian Journal of Physics, 1970
- Effects of Double Exchange in Magnetic CrystalsPhysical Review B, 1960
- Further experimental investigations on some ferromagnetic oxidic compounds of manganese with perovskite structurePhysica, 1954