Magnetic structure transitions on novel layered cobalt oxides
Intriguing mangetoelectronic properties were reported for the magnetoplumbite-related layered cobalt oxide SrCo6O11. The magnetism of SrCo6O11 is illustrated as an Ising-like anisotropy of Co(3) site in trigonal bipyramidal coordination along the c axis and a field-induced stepwise transition from 1/3-plateau ferrimagnet to 3/3-plateau ferromagnet. Recently, we successfully synthesized novel layered oxides of CaCo6O11 and BaCo6O11 and observed various magnetic phases differing from that of SrCo6O11. CaCo6O11 displays an antiferroparamagnet with 0/3-plateau, whereas BaCo6O11 exhibited simple ferromagnetism. Another type of field-induced phase transition from antiferroparamagnet to ferrimagnet was also observed for CaCo6O11. These intriguing behavior were obvserved macroscopically, but the detail magnetic structures were not determined yet. In this study, we aim to elucidate the magnetic structures of these oxides and further investigate the field-induced magnetic structure transition from 0/3 to 1/3 plateau for CaCo6O11.
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YAMADA Ikuya; Claire V. Colin; D ASTUTO Matteo; Thomas C. Hansen; SUARD Emmanuelle; TODA Fumito and YAMAMOTO Hajime. (2020). Magnetic structure transitions on novel layered cobalt oxides. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2743
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