Speaker
Dr
Martin Mansson
(Laboratory for Solid State Physics, ETH Zurich)
Description
Recently, the mixed metal oxides of the form Li(Ni[1/3]Co[1/3]Mn[1/3])O2, have become the centre of attention as promising candidates for novel battery material. These materials have also revealed very interesting magnetic properties. The title compound, was from magnetometry measurements [1] found to be a percolating spin system interacting via AFM and FM superexchange interactions of different strength. On cooling, evidence of spin glass behaviour in 2D is found followed by a completely frustrated system in 3D at the lowest temperature. From aging experiments, a coexistence of ordered and frustrated states are found. The aging behaviour prevails up to the paramagnetic region which suggests that parts of the compound remain frustrated for all temperatures below Tc. Our wTF muSR results clearly show how the magnetically ordered fraction is gradually building up in steps over an extended temperature range. From ZF muSR we further see that no clear long-range magnetic order is present at lowest temperature as indicated by the absence of clear clear oscillatios in the time spectrum. [1] J.M. Wikberg et al., sJ. Appl. Phys. 180, 083909 (2010).
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Poster
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Primary author
Dr
Martin Mansson
(Laboratory for Solid State Physics, ETH Zurich)
Co-authors
Dr
Jun Sugiyama
(Toyota Central Research and Development Labs. Inc., Japan)
Dr
Kazuya Kamazawa
(Toyota Central Research and Development Labs. Inc., Japan)
Dr
Magnus Wikberg
(Department of Engineering Sciences, Uppsala University ,Sweden)
Dr
Mohammed Dahbi
(Department of Materials Chemistry, Uppsala University, Sweden)
