Pressure dependence of magnetic transition temperature in LiO4 (0 less than or equal to x less than or equal to 1/3) studied by muon-spin rotation and relaxation

In order to study a change in electrochemical, structural, and magnetic properties for lithium manganese oxide spinels Li[LixMn2-x]O4 (LMO) with 0 less than or equal to x less than or equal to 1/3, muon-spin rotation and relaxation ( mu SR) spectra were recorded under pressure (P) up to 2.1 GPa. At...

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Bibliographic Details
Published in:Journal of applied physics 2013-01, Vol.113 (5)
Main Authors: Mukai, Kazuhiko, Andreica, Daniel, Ikedo, Yutaka, Nozaki, Hiroshi, Mansson, Martin, Amato, Alex, Sugiyama, Jun
Format: Article
Language:English
Subjects:
Anodic
Diffusivity
Magnetic properties
Magnetic transitions
Muons
Spectra
Transition temperature
Voltammetry
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Summary:In order to study a change in electrochemical, structural, and magnetic properties for lithium manganese oxide spinels Li[LixMn2-x]O4 (LMO) with 0 less than or equal to x less than or equal to 1/3, muon-spin rotation and relaxation ( mu SR) spectra were recorded under pressure (P) up to 2.1 GPa. At ambient P, P = 0.1 MPa, the antiferromagnetic or spin-glass-like transition temperature (Tm) at P = 0.1 MPa monotonically decreases with increasing x. On the contrary, the slope of the Tm vs. P (dTm/dP) rapidly increases from 0.9(1) K/GPa at x = 0 to 1.4 K/GPa at x = 0.1, then drops to 0.7(1) K/GPa at x = 0.15, and finally keeps constant ( similar to 0.4 K/GPa) with further increasing x. Considering the structural change of LMO with x, the decrease in the distance between Mn ions (dMn-Mn) is likely to play an essential role for determining Tm under P. According to cyclic voltammetry on LMO, the peak current at both anodic and cathodic directions shows the maximum at x = 0.1, indicating the highest diffusivity of Li+ ions (DLi) at x = 0.1.
ISSN:0021-8979
DOI:10.1063/1.4790377