Giant magnetoresistance in bulk samples of La{sub 1-x}A{sub x}MnO{sub 3} (A = Sr or Ca)
Journal Article
·
· Journal of Solid State Chemistry
- Indian Inst. of Science, Bangalore (India)
Magnetoresistance measurements have been carried out on bulk samples of several members of the La{sub 1-x}A{sub x}MnO{sub 3} family (A = Sr and Ca) with varying x or Mn{sup 4+} content. The magnitude of magnetoresistance (MR) is highest at the insulator-metal (I-M) transition when the transition temperature is relatively low ({approx_lt}250 K). The relative Mr (%MR) is essentially the same (40-50%) at 4.2 K for all the compositions showing the I-M transition, namely {approximately}15% at T {approx_gt} 300 K. Insulating compositions (small or large x) show smaller %MR than the compositions that undergo the I-M transition.
- OSTI ID:
- 552745
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 1 Vol. 114; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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