Giant magnetoresistance at 300 K in single crystals of La0.65(PbCa)0.35MnO3
- 5 June 1995
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 66 (23) , 3218-3220
- https://doi.org/10.1063/1.113728
Abstract
Giant magnetoresistance (GMR) at 300 K and 5.5 T with ΔR/R(0)=74% was observed in single crystals of La0.65(PbCa)0.35MnO3. The maximum GMR occurs exactly at the ferromagnetic–paramagnetic phase transition temperature (Tc). For T<Tc, the R(T) curve is closely related to the M(T) curve. A sign change in the curvatures of R(H) curves below and above Tc has been observed, indicating that two different mechanisms are responsible for the magnetic scatterings of the carriers in two separate temperature regions.Keywords
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