Abstract / Description of output
The magnetic structure of a hexagonal layered cobalt oxide SrCo6O11, which exhibits a 1/3 magnetization plateau and a concomitant large negative megnetoresistance below 20 K, was studied by means of neutron diffraction measurements and Rietveld analysis. It has been found that only the trigonal bipyramidal site carries a localized moment, which corresponds to S = 2, and that the moment has an Ising-like anisotropy along the c-axis. These moments are aligned ferromagnetically in the c-plane, while the interlayer coupling is field dependent. The 1/3 magnetization plateau reflects a field-induced ferrimagnetic alignment along the c-axis like "up-up-down-up-up-down". We interpret this complex spin structure as resulting from competition of an anti ferromagnetic superexchange interaction between the nearest ferromagnetic layers and carrier-mediated, ferromagnetic interactions. (c) 2006 Elsevier B.V. All rights reserved.
Original language | English |
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Pages (from-to) | 1584-1586 |
Number of pages | 3 |
Journal | Journal of Magnetism and Magnetic Materials |
Volume | 310 |
Issue number | 2 |
DOIs | |
Publication status | Published - Mar 2007 |
Keywords / Materials (for Non-textual outputs)
- magnetization plateau
- magnetic structure
- SrCo6O11
- TOF neutron diffraction
- m agnetoresi stance
- MAGNETIZATION
- LATTICE