Influence of Simultaneous Doping of Li^+ and Fe^{3+} Ions in the LiMn_2O_4 Spinel Structure

• Authors: W. Nowicki
• Languages of publication: EN

Abstracts

EN

A series of compounds Li_xMn_{3-x-y}Fe_yO_4 (x=1.0125;0≤y≤0.05) were synthesized by solid state reaction of Li_2CO_3 with the manganese oxide or iron-manganese oxide precursors. Investigations of the structure transformation effect of double substitution with Li^+ and Fe^{3+} ions in LiMn_2O_4, in the temperature range of 10-300 K, were undertaken using high-resolution X-ray powder diffraction at the HASYLAB (DESY) synchrotron. The Li_{1.0125}Mn_{1.9625}Fe_{0.025}O_4 transforms from cubic (Fd3̅ m) to orthorhombic (Fddd) below 250 K, and is stable to 10 K. Whereas in the Li_{1.0125}Mn_{1.9375}Fe_{0.05}O_4 oxide no phase transition was observed, this spinel remains in cubic structure down to the temperature of 10 K.

Keywords

EN

61.66.Fn; 75.47.Lx; 68.18.Jk; 73.21.Cd

Discipline

• 61.66.Fn: Inorganic compounds
• 75.47.Lx: Magnetic oxides
• 73.21.Cd: Superlattices
• 68.18.Jk: Phase transitions in liquid thin films

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 114
• Issue: 2
• Pages: 375-382

Dates

published

2008-08

received

2007-09-24

Contributors

author

W. Nowicki

• Department of Materials Chemistry, Faculty of Chemistry, Adam Mickiewicz University, Grunwaldzka 6, PL-60-780 Poznań, Poland

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Identifiers

DOI

10.12693/APhysPolA.114.375