A polar corundum oxide displaying weak ferromagnetism at room temperature

Man Rong Li, Umut Adem, Sean R.C. McMitchell, Zhongling Xu, Chris I. Thomas, John E. Warren, Duong V. Giap, Hongjun Niu, Xinming Wan, Robert G. Palgrave, Florian Schiffmann, Furio Cora, Ben Slater, Tim L. Burnett, Markys G. Cain, Artem M. Abakumov, Gustaaf Van Tendeloo, Michael F. Thomas, Matthew J. Rosseinsky, John B. Claridge

Research output: Contribution to journalArticlepeer-review

59 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)3737-3747
Number of pages11
JournalJournal of the American Chemical Society
Volume134
Issue number8
DOIs
Publication statusPublished - 29 Feb 2012
Externally publishedYes

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