A Polar Magnetic and Insulating Double Corundum Oxide: Mn2MnSbO6 with Ordered Mn(II) and Mn(III) Ions
- Rutgers Univ., Piscataway, NJ (United States); Chinese Academy of Sciences (CAS), Beijing (China)
- Chungnam National University, Daejeon (Korea, Republic of)
- Kunsan National University, Gunsan (Korea, Republic of)
- Korea Atomic Energy Research Institute (KAERI), Daejeon (Korea, Republic of)
- Rutgers Univ., Piscataway, NJ (United States)
- New Jersey Institute of Technology, Newark, NJ (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Pennsylvania State Univ., University Park, PA (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Chinese Academy of Sciences (CAS), Beijing (China)
- Columbia Univ., Palisades, NY (United States)
A new magnetic insulator Mn2MnSbO6 with a polar crystal structure and an ordered Mn2+ and Mn3+ arrangement was synthesized under a high pressure of 7.5 GPa and 1300 °C. The crystal structure of Mn2MnSbO6, investigated by synchrotron powder X-ray diffraction, was found to be isomorphous with that of Ni3TeO6-type, space group R3. The non-centrosymmetric structure was confirmed by the second-harmonic generation measurements. The X-ray absorption near-edge spectroscopy measurement confirmed the nominal oxidation states of Mn2+2Mn3+SbO6. Magnetic measurements indicate that Mn2MnSbO6 orders antiferromagnetically below 44 K and undergoes a field-induced spin-flop transition at 5 K. First-principles calculations indicate an antiferromagnetic ground state with up/up/up/down/down/down (uuuddd) spin configuration of the six crystallographically unique Mn ions in the c-axis doubled magnetic structure. The density functional theory calculations also substantiate the experimentally observed charge ordering of the Mn2+/Mn3+ ions and the insulating behavior due to a bandgap of 0.52 eV. Finally, to the best of our knowledge, this is the first double corundum oxide containing Jahn–Teller active Mn3+ ions.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- National Research Foundation (NRF); National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1832766
- Report Number(s):
- BNL-222189-2021-JAAM
- Journal Information:
- Chemistry of Materials, Journal Name: Chemistry of Materials Journal Issue: 16 Vol. 33; ISSN 0897-4756
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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