Giant magnetoresistance at 300 K in single crystals of La0.65(PbCa)0.35MnO3
1995; American Institute of Physics; Volume: 66; Issue: 23 Linguagem: Inglês
10.1063/1.113728
ISSN1520-8842
AutoresJ. Z. Liu, Ing-Chau Chang, S. H. Irons, P. Klavins, R.N. Shelton, Kibaek Song, S.R. Wasserman,
Tópico(s)Advanced Thermoelectric Materials and Devices
ResumoGiant 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.
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