Magnetic ordering in the spinel compound Li[Mn2-xLix]O4(x=0,0.04)

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Magnetic ordering in the spinel compound Li[Mn2-xLix]O4(x=0,0.04)

Please use this identifier to cite or link to this item: http://hdl.handle.net/10355/8190

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Title: Magnetic ordering in the spinel compound Li[Mn2-xLix]O4(x=0,0.04)
Author: Gaddy, John; Lamsal, Jagat; Petrovic, Marcus; Montfrooij, Wouter; Schmets, Alexander J. M.; Vojta, Thomas
Keywords: spin arrangements in magnetically ordered materials
spin-glass and other random models
antiferromagnetics
Date: 2009-03-11
Publisher: American Institute of Physics
Citation: J. Appl. Phys. 105, 07D532 (2009)
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.
URI: http://hdl.handle.net/10355/8190
ISSN: 0021-8979

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