Composition dependence of giant magnetoresistance in La1−xCaxMnO3 (0.1≤x≤0.9)

Mahendiran, R. ; Mahesh, R. ; Raychaudhuri, A. K. ; Rao, C. N. R. (1995) Composition dependence of giant magnetoresistance in La1−xCaxMnO3 (0.1≤x≤0.9) Solid State Communications, 94 (7). pp. 515-518. ISSN 0038-1098

Full text not available from this repository.

Official URL:

Related URL:


We have studied the resistivity (ρ) and the magnetoresistance (MR) in sintered samples of La1−xCaxMnO3 for 0.1≤x≤0.9 in the temperature range 4.2K≤T≤400K in magnetic fields H≤6T. We have observed giant negative magnetoresistance in the whole composition range, although the magnitude of MR depends on the level of doping, the peak in the magnitude of MR [(ρ(H)-ρ(0))/ρ(0)] at 6T being be as high as 90%. The magnitude of the MR generally increases as the temperature corresponding to the MR peak decreases. All the samples with x≤0.5 show a ferromagnetic transition with the temperature dependence of ρ showing a metallic behavior (dρ/dT>0) below the Curie temperature. The sample with x=0.9 shows insulating behavior over the entire temperature range but the MR shows a peak at low temperatures.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Giant Magnetoresistance; Perovskite Oxides
ID Code:42278
Deposited On:02 Jun 2011 09:55
Last Modified:05 Jul 2012 03:54

Repository Staff Only: item control page