2023-Sustainable Industrial Processing Summit
Poeppelmeier Intl. Symp. / Solid State Chemistry
| Editors: | F. Kongoli, M. Delferro, P. S. Halasyamani, M. A. Alario-Franco, F. Marquis, A. Tressaud, H. Kageyama |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2023 |
| Pages: | 144 pages |
| ISBN: | 978-1-989820-86-5 (CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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DESIGNING POLAR AND MAGNETIC OXIDES IN THE A2BB'O6-TYPE CORUNDUM DERIVATIVES
Martha Greenblatt1;1RUTGERS UNIVERSITY, Piscataway, United States;
Type of Paper: Regular
Id Paper: 342
Topic: 52
Abstract:
Polar and magnetic oxides are fundamentally and technically important, but difficult to prepare. Recently, we were able to synthesize, at high pressure and temperature (HPT) in a Walker-type multi-anvil cell, a number of new compounds, A2BB’O6 in the corundum-derived and perovskite structure with unusually small A-site cations.[1-5] At HPT the crystal structures of these A2BB'O6 phases allow the incorporation of strong magnetic transition metal ions on all cation sites for magneticand potentially multiferroic, or magnetoelectric behavior and applications in spintronics. Our aim is to design room-temperature polar ferri- or ferro-magnets by composition modulation of A2BB'O6 phases. So far, we have successfully prepared a series of polar and magnetic oxides and systematically investigated the relationship between the crystal, magnetic, and electronic structure and physical properties. The discovery of polar antiferromagnetic LiNbO3-type (R3c) Mn2FeMO6 (M = Nb, Ta)1 predicted new polar structures with second-order Jahn-Teller effect ions (such as Nb5+ and Ta5+, d0) at the B'-site and small ions at the A-site of A2BB'O6, which has been confirmed by the preparation of Zn2FeTaO6.[2] In the Ni3TeO6-type (R3) ferrimagnetic semiconductor Mn2FeMoO6 (TC ~ 340 K),[3] the polarization of the structure, is found to be stabilized by the spin structure at high pressure, while at ambient pressure, a new spin structure with lower energy state induces an unusually low-temperature (~400 - 550 K) cationic rearrangement, which provides a new way to tune the physical properties at the atomic-scale, under relatively mild conditions, of bulk oxides. In polar ferrimagnetic Mn2FeWO6 with Ni3TeO6-type structure the charge and size difference between Fe2+ and W6+ leads to a fully ordered Fe/W lattice and several exotic magnetic phases. [4] Other A2BB’O6 compounds with perovskite or distorted perovskite structures and interesting magnetic properties were also synthesized at HPT, such as Mn2FeReO6 which is half-metallic with large magnetoresistance and orders ferri-magneticaly at 520 K. [5] While all of these materials are multiferroic, none studied thus far exhibits ferroelectric switching.
Keywords:
Advanced Characterization Techniques And Applications; Advances In The Synthesis Routes; Design Of Materials For Sustainable Energy Production; Important Classes Of Materials; high-pressure synthesis; structure; multiferroicsReferences:
[1] Guo-Hong Cai, Martha Greenblatt, Man-Rong Li, Chem. Mater., 29, 5497-5457 (2017).[2] Man-Rong Li, Emma McCabe, Peter W. Stephens, Mark Croft, Liam F. Collins, Sergei V. Kalinin, Zheng Deng, Maria Retuerto, Arnab Sen Gupta, Haricharan Padmanabhan, Venkatraman Gopalan, Christoph P. Grams, Joachim Hemberger, Fabio Orlandi, Pascal Manuel, Wen-Min Li, Chang-Qing Jin, Dave Walker, Martha Greenblatt* , Nature Commun., 8(1), 1-9 (2017)
[3] Man-Rong Li, Peter W. Stephens, Mark Croft, Zheng Deng, Maria Retuerto, Jason Hodges, Dave Walker, Martha Greenblatt, Chem. Mater., 30(14), 4508-4514.(2018).
[4] Man-Rong Li, Emma McCabe, Peter W. Stephens, Mark Croft, Liam F. Collins, Sergei V. Kalinin, Zheng Deng, Maria Retuerto, Arnab Sen Gupta, Haricharan Padmanabhan, Venkatraman Gopalan, Christoph P. Grams, Joachim Hemberger, Fabio Orlandi, Pascal Manuel, Wen-Min Li, Chang-Qing Jin, Dave Walker, Martha Greenblatt* , Nature Commun., 8(1), 1-9 (2017).
[5] Corey E. Frank, Emma E McCabe, Fabio Orlandi, Pascal Manuel, Xiaoyan Tan, Zheng Deng, Mark Croft,f Vanessa A. Cascos, Thomas Emge, Hai L. Feng, Saul Lapidus, Changqing Jin, MeiXia Wu, Man Rong Li, Steven Ehrlich, Syed Khalid, Nicholas Quackenbush, Shuang Yu, David Walker, and Martha Greenblatt, Chem. Commun., 55, 3331-3334 (2019).