Abstract
The two B-site ions Mn3+ and Mn4+ in the stoichiometric spinel structure LiMn2O4 form a complex, columnar ordered pattern below the charge-ordering transition at room temperature. On further cooling to below 66 K, the system develops long-range antiferromagnetic order. In contrast, whereas lithium-substituted Li[Mn2−xLix]O4 also undergoes a charge-ordering transition around room temperature, it only displays frozen in short-range magnetic order below ~25-30 K. We investigate to what extent the columnar charge-order pattern observed in LiMn2O4 can account for the measured magnetic ordering patterns in both the pure and Li-substituted (x=0.04) compounds. We conclude that eightfold rings of Mn4+ ions form the main magnetic unit in both compounds (x=0,0.04), and that clusters formed out of these rings act as superspins in the doped compound.
Recommended Citation
J. Gaddy et al., "Magnetic Ordering in the Spinel Compound Li[Mn₂₋ₓLix]O₄(X=0, 0.04)," Journal of Applied Physics, American Institute of Physics (AIP), Mar 2009.
The definitive version is available at https://doi.org/10.1063/1.3073660
Department(s)
Physics
Sponsor(s)
United States. Department of Energy
Keywords and Phrases
Antiferromagnetic Materials; Lithium Compounds; Long-Range Order; Magnetic Structure; Short-Range Order
International Standard Serial Number (ISSN)
0021-8979
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2009 American Institute of Physics (AIP), All rights reserved.
Publication Date
01 Mar 2009
