Author/Authors :
Krins، نويسنده , , N. and Hatert، نويسنده , , F. and Traina، نويسنده , , K. and Dusoulier، نويسنده , , L. and Molenberg، نويسنده , , I. and Fagnard، نويسنده , , J.F. and Vanderbemden، نويسنده , , Ph. and Rulmont، نويسنده , , A. and Cloots، نويسنده , , R. and Vertruyen، نويسنده , , B.، نويسنده ,
Abstract :
LiMn2−xTixO4 compounds with 0 ≤ x ≤ 1 were prepared by solid state reaction and Pechini technique. Powder X-ray diffraction showed that all samples crystallize with the spinel crystal structure (S.G. Fd3¯m). The cubic unit-cell parameter increases with the Ti content. The influence of the Ti content and cationic distribution on the magnetic properties of the compounds was studied by measuring the temperature and magnetic field dependences of the magnetization: substitution by non-magnetic d0 Ti4+ ions appeared to weaken the magnetic interactions between the manganese ions. The electrical properties of LiMnTiO4 were studied by AC impedance spectroscopy and DC polarisation measurements, which revealed the electronic character of the conduction process.
Keywords :
crystal structure , Impedance spectroscopy , Magnetic properties , Charge–discharge test , Ti-doped LiMn2O4
