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Large temperature coefficient of resistance and magnetoresistance of La0.71Ca0.29Mn1-Co O3 polycrystalline ceramics
- Source :
- Ceramics International. 47:32097-32103
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- La0.71Ca0.29MnO3 is a strongly correlated electronic material, which has been extensively researched and has high application value. It is known that improvements of the temperature coefficient of resistance (TCR) and magnetoresistance (MR), which are important parameters for the application of such materials, promote their applications. Using other elements to replace Mn sites is one of the methods to improve the specific properties. Herein, we prepare a series of La0.71Ca0.29Mn1-xCoxO3 (x = 0, 0.01, 0.03, 0.05, 0.1) polycrystalline ceramics via sol-gel method, and explore the effect of Co doping on the properties of La0.71Ca0.29MnO3. The results show that a small amount of Co doping can significantly improve TCR and MR. Under our excellent preparation process, TCR of La0.71Ca0.29MnO3 was 22.5%·K−1 and MR was 52.9% (under 1T magnetic field). When Co doping is 0.01, TCR reaches 35.1%·K−1 value and MR reaches 64.8%. This can provide critical information for the future application of such materials in bolometers and magnetic sensors.
- Subjects :
- Materials science
Magnetoresistance
Condensed matter physics
Process Chemistry and Technology
Doping
Bolometer
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
law.invention
Magnetic field
Excellent preparation
law
visual_art
Materials Chemistry
Ceramics and Composites
visual_art.visual_art_medium
Crystallite
Ceramic
Temperature coefficient
Subjects
Details
- ISSN :
- 02728842
- Volume :
- 47
- Database :
- OpenAIRE
- Journal :
- Ceramics International
- Accession number :
- edsair.doi...........80436bc09e71dc72a07ba6bd7d87e401
- Full Text :
- https://doi.org/10.1016/j.ceramint.2021.08.099