Li, M R*; Adem, U*; McMitchell, S R C*; Xu, Z L*; Thomas, C I*; Warren, J E*; Giap, D V*; Niu, H J*; Wan, X M*; Palgrave, R G*; Schiffmann, F*; Cora, F*; Slater, B*; Burnett, T L; Cain, M G; Abakumov, A M*; van Tendeloo, G*; Thomas, M F*; Rosseinsky, M J*; Claridge, J B* (2012) A polar corundum oxide displaying weak ferromagnetism at room temperature. J. Am. Chem. Soc., 134 (8). pp. 3737-3747.

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Abstract

Combining long-range magnetic order with polarity in the same structure is a pre-requisite 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 characterise ScFeO3 (SFO) which under pressure and in strain-stabilised thin films adopts a polar variant of the corundum structure, one of the archetypal binary oxide structures. Polar corundum ScFeO3 has a weak ferromagnetic ground state below 356 K - this is in contrast to the purely antiferromagnetic state adapted by the well-studied ferroelectric BiFeO3.

Item Type:	Article
Keywords:	piezoelectric, multiferroic
Subjects:	Advanced Materials Advanced Materials > Functional Materials
Identification number/DOI:	10.1021/ja208395z
Last Modified:	02 Feb 2018 13:14
URI:	http://eprintspublications.npl.co.uk/id/eprint/5432

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