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A polar corundum oxide displaying weak ferromagnetism at room temperature
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| Abstract |
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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 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. | | |
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English
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| Source (journal) |
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Journal of the American Chemical Society. - Washington, D.C. | |
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Washington, D.C. : 2012
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0002-7863
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134:8(2012), p. 3737-3747
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000301161600027
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