Li, MR; Adem, U; McMitchell, SR; Xu, Z; Thomas, CI; Warren, JE; ... Claridge, JB; + view all Li, MR; Adem, U; McMitchell, SR; Xu, Z; Thomas, CI; Warren, JE; Giap, DV; Niu, H; Wan, X; Palgrave, RG; Schiffmann, F; Cora, F; Slater, B; Burnett, TL; Cain, MG; Abakumov, AM; van Tendeloo, G; Thomas, MF; Rosseinsky, MJ; Claridge, JB; - view fewer (2012) A polar corundum oxide displaying weak ferromagnetism at room temperature. J Am Chem Soc , 134 (8) 3737 - 3747. 10.1021/ja208395z.
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Combining long-range magnetic order with polarity in the same structure is a prerequisite for the design of (magnetoelectric) multiferroic materials. There are now several demonstrated strategies to achieve this goal, but retaining magnetic order above room temperature remains a difficult target. Iron oxides in the +3 oxidation state have high magnetic ordering temperatures due to the size of the coupled moments. Here we prepare and characterize ScFeO(3) (SFO), which under pressure and in strain-stabilized thin films adopts a polar variant of the corundum structure, one of the archetypal binary oxide structures. Polar corundum ScFeO(3) has a weak ferromagnetic ground state below 356 K-this is in contrast to the purely antiferromagnetic ground state adopted by the well-studied ferroelectric BiFeO(3).
|Title:||A polar corundum oxide displaying weak ferromagnetism at room temperature.|
|Keywords:||Aluminum Oxide, Ferric Compounds, Magnetic Phenomena, Membranes, Artificial, Oxides, Scandium, Temperature|
|UCL classification:||UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry|
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