Back to Search
Start Over
Magnetic and transport properties of Eu1-xSrxCoO3.
- Source :
- Journal of Applied Physics; 8/1/2007, Vol. 102 Issue 3, p033910, 4p, 5 Graphs
- Publication Year :
- 2007
-
Abstract
- We have studied the magnetic and electronic properties of Eu<subscript>1-x</subscript>Sr<subscript>x</subscript>CoO<subscript>3</subscript> with 0/16≤x≤12/16. In the Sr doping range from 2/16 to 11/16, the ferromagnetic clusters coexist spatially with an antiferromagnetic matrix. The magnetization at low temperatures strongly depends on the Sr concentration x, exhibiting a maximum near half doping, which is described in term of the double-exchange mechanism. The semiconductor-metal transition at low temperatures occurs at x between 4/16 and 5/16, which indicates that the ferromagnetic clusters coalesce, leading to a percolative metallic conduction up to the composition of x=10/16. As compared with those of La<subscript>1-x</subscript>Sr<subscript>x</subscript>CoO<subscript>3</subscript> and Nd<subscript>1-x</subscript>Sr<subscript>x</subscript>CoO<subscript>3</subscript>, Eu<subscript>1-x</subscript>Sr<subscript>x</subscript>CoO<subscript>3</subscript> shows a larger critical Sr concentration for semiconductor-metal transition and lower ferromagnetic transition temperatures, which is attributed to the enhanced global and local lattice distortion due to the smaller cation radius of the Eu<superscript>3+</superscript> ions. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 102
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 26257473
- Full Text :
- https://doi.org/10.1063/1.2767270