Magnetoresistance of the spin-state-transition compound La1-xSrxCoO3
Creators
- 1. Department of Physics, Indian Institute of Science, Bangalore--560 012 (India)
Description
We have investigated the magnetoresistance (MR) of the perovskite oxide La1-xSrxCoO3 for 0 ≤x≤0.4 which shows a spin-state transition from low-spin CoIII to high-spin Co3+ as a function of temperature. In the metallic compositions (x≥0.25) appreciable MR occurs only near the ferromagnetic Curie temperature. For the most metallic composition x=0.4, there is a small positive contribution to the MR near the Tc. In the insulating samples (x≤0.2) the MR shows a large hysteresis which depends on the temperature. The value of the MR is negative and large in the insulating compositions and shows a maximum near the temperature where magnetic studies showed a spin-glass-like transition. We also find a strong role of the spin-state transition of the Co3+ ions in the electronic transport leading to a characteristic behavior of the MR in the Co3+-rich insulating samples. copyright 1996 The American Physical Society
Additional details
Publishing Information
- Journal Title
- Physical Review. B, Condensed Matter
- Journal Volume
- 54
- Journal Issue
- 22
- Journal Page Range
- p. 16044-16052.
- ISSN
- 0163-1829
- CODEN
- PRBMDO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 28012437
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- COBALT OXIDES; ELECTRONIC STRUCTURE; EXCHANGE INTERACTIONS; FERROMAGNETIC MATERIALS; LANTHANUM OXIDES; MAGNETIC PROPERTIES; MAGNETORESISTANCE; PHASE TRANSFORMATIONS; STRONTIUM OXIDES; TEMPERATURE DEPENDENCE
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; COBALT COMPOUNDS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; INTERACTIONS; LANTHANUM COMPOUNDS; MAGNETIC MATERIALS; MATERIALS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; STRONTIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS