Hong K H, Arevalo-Lopez A M, Coduri M, McNally G M, Attfield J P
Centre for Science at Extreme Conditions and School of Chemistry , University of Edinburgh , Mayfield Road , Edinburgh EH9 3JZ , UK . Email:
Univ. Lille , CNRS , Centrale Lille , ENSCL , Univ. Artois , UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide , F-59000 Lille , France.
J Mater Chem C Mater. 2018 Apr 7;6(13):3271-3275. doi: 10.1039/c8tc00053k. Epub 2018 Jan 16.
The recently-discovered high pressure material MnFeO displays a rich variety of magnetically ordered states on cooling. Fe spins order antiferromagnetically below a Néel transition at 350 K. A second transition at 150 K marks Mn spin order that leads to spin canting of some of the Fe spins and ferrimagnetism. A further transition at 60 K is driven by charge ordering of Fe and Fe over two inequivalent Fe sites, with further canting of all spins. Electrical resistivity measurements reveal semiconducting behaviour in MnFeO with a change in activation energy at 285 K.
最近发现的高压材料MnFeO在冷却时呈现出丰富多样的磁有序状态。在350 K的奈尔转变温度以下，铁自旋呈反铁磁有序排列。150 K时的第二次转变标志着锰自旋有序排列，导致部分铁自旋发生自旋倾斜并产生亚铁磁性。60 K时的进一步转变是由铁在两个不等价铁位点上的电荷有序排列驱动的，所有自旋进一步倾斜。电阻率测量表明，MnFeO具有半导体行为，其激活能在285 K时发生变化。
