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STUDY OF ELECTRICAL TRANSPORT AND AC SUSCEPTIBILITY IN LaMn1-xCuxO3.
- Source :
-
Modern Physics Letters B . 3/20/2005, Vol. 19 Issue 6, p317-330. 14p. - Publication Year :
- 2005
-
Abstract
- LaMn1-xCuxO3 compounds have been prepared in single phase form for x - 0 to 0.30. X-ray diffraction patterns recorded at room temperature could be mostly refined using Pbnm space group. Paramagnetic-to-ferromagnetic transitions have been observed up to x = 0.30, from ac susceptibility measurements. Metal-insulator transition in the vicinity of ferromagnetic transition temperature has been observed for x = 0.05 and the resistivity data in the metallic region could be explained in terms of electron-electron and electron-magnon scattering mechanisms. Further increase in Cu-doping beyond x = 0.05 leads to systematic decrease in ferromagnetic transition temperature and ultimately ferromagnetism is destroyed for x = 0.40. The resistivity data of all samples except x = 0.05 exhibit semiconducting behaviors and they could be mostly explained using the adiabatic small polaron hopping model. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02179849
- Volume :
- 19
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Modern Physics Letters B
- Publication Type :
- Academic Journal
- Accession number :
- 17230673
- Full Text :
- https://doi.org/10.1142/S0217984905008323