A Polar Corundum Oxide Displaying Weak Ferromagnetism at Room Temperature

被引:73
|
作者
Li, Man-Rong [1 ]
Adem, Umut [1 ]
McMitchell, Sean R. C. [1 ]
Xu, Zhongling [1 ]
Thomas, Chris I. [1 ]
Warren, John E. [1 ]
Giap, Duong V. [1 ]
Niu, Hongjun [1 ]
Wan, Xinming [1 ]
Palgrave, Robert G. [1 ]
Schiffmann, Florian [2 ]
Cora, Furio [2 ]
Slater, Ben [2 ]
Burnett, Tim L. [3 ]
Cain, Markys G. [3 ]
Abakumov, Artem M. [4 ]
van Tendeloo, Gustaaf [4 ]
Thomas, Michael F. [5 ]
Rosseinsky, Matthew J. [1 ]
Claridge, John B. [1 ]
机构
[1] Univ Liverpool, Dept Chem, Liverpool L69 7ZD, Merseyside, England
[2] UCL, Dept Chem, London WC1H 0AJ, England
[3] Natl Phys Lab, Teddington TW11 0LW, Middx, England
[4] EMAT Univ Antwerp, B-2020 Antwerp, Belgium
[5] Univ Liverpool, Dept Phys, Liverpool L69 7ZE, Merseyside, England
基金
英国工程与自然科学研究理事会;
关键词
HIGH-PRESSURE; FERROELECTRIC POLARIZATION; THIN-FILM; MULTIFERROICS; PEROVSKITES; TRANSITION; BIXBYITE; PHYSICS;
D O I
10.1021/ja208395z
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
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 ScFeO3 (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 ScFeO3 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 BiFeO3.
引用
收藏
页码:3737 / 3747
页数:11
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