| Title | Tuning the Neel Temperature of Hexagonal Ferrites by Structural Distortion |
| Authors | Sinha, Kishan Wang, Haohan Wang, Xiao Zhou, Liying Yin, Yuewei Wang, Wenbin Cheng, Xuemei Keavney, David J. Cao, Huibo Liu, Yaohua Wu, Xifan Xu, Xiaoshan |
| Affiliation | Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA. Bryn Mawr Coll, Dept Phys, Bryn Mawr, PA 19010 USA. Temple Univ, Dept Phys, Philadelphia, PA 19122 USA. Peking Univ, Int Ctr Quantum Mat, Sch Phys, Beijing 100871, Peoples R China. Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. Oak Ridge Natl Lab, Neutron Scattering Div, Oak Ridge, TN 37831 USA. Univ Nebraska, Nebraska Ctr Mat & Nanosci, Lincoln, NE 68588 USA. |
| Keywords | MAGNETIC-PROPERTIES SUPEREXCHANGE INTERACTION WEAK FERROMAGNETISM FERROELECTRICITY MULTIFERROISM EVOLUTION ROOM |
| Issue Date | 2018 |
| Publisher | PHYSICAL REVIEW LETTERS |
| Citation | PHYSICAL REVIEW LETTERS. 2018, 121(23). |
| Abstract | To tune the magnetic properties of hexagonal ferrites, a family of magnetoelectric multiferroic materials, by atomic-scale structural engineering, we studied the effect of structural distortion on the magnetic ordering temperature (T-N) in these materials. Using the symmetry analysis, we show that unlike most antiferromagnetic rare-earth transition-metal perovskites, a larger structural distortion leads to a higher T-N in hexagonal ferrites and manganites, because the K-3 structural distortion induces the three-dimensional magnetic ordering, which is forbidden in the undistorted structure by symmetry. We also revealed a near-linear relation between T-N and the tolerance factor and a power-law relation between T-N and the K-3 distortion amplitude. Following the analysis, a record-high T-N (185 K) among hexagonal ferrites was predicted in hexagonal ScFeO3 and experimentally verified in epitaxially stabilized films. These results add to the paradigm of spin-lattice coupling in antiferromagnetic oxides and suggests further tunability of hexagonal ferrites if more lattice distortion can be achieved. |
| URI | http://hdl.handle.net/20.500.11897/571273 |
| ISSN | 0031-9007 |
| DOI | 10.1103/PhysRevLett.121.237203 |
| Indexed | SCI(E) Medline |
| Appears in Collections: | 量子材料科学中心 |
