High-Pressure Synthesis and Ferrimagnetism of Ni3TeO6-Type Mn2ScMO6 (M = Nb, Ta)

Hai L. Feng, Zheng Deng, Mark Croft, Saul H. Lapidus, Rui Zu, Venkatraman Gopalan, Christoph P. Grams, Joachim Hemberger, Sizhan Liu, Trevor A. Tyson, Corey E. Frank, Changqing Jin, David Walker, Martha Greenblatt

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Abstract

The corundum-related oxides Mn2ScNbO6 and Mn2ScTaO6 were synthesized at high pressure and high temperature (6 GPa and 1475 K). Analysis of the synchrotron powder X-ray diffraction shows that Mn2ScNbO6 and Mn2ScTaO6 crystallize in Ni3TeO6-type noncentrosymmetric crystal structures with space group R3. The asymmetric crystal structure was confirmed by second harmonic generation measurement. X-ray absorption near-edge spectroscopies indicate formal valence states of Mn2+ 2Sc3+Nb5+O6 and Mn2+ 2Sc3+Ta5+O6, also supported by the calculated bond valence sums. Both samples are electrically insulating. Magnetic measurements indicate that Mn2ScNbO6 and Mn2ScTaO6 order ferrimagnetically at 53 and 50 K, respectively, and Mn2ScTaO6 is found to have a field-induced magnetic transition.

Original languageEnglish (US)
Pages (from-to)15953-15961
Number of pages9
JournalInorganic chemistry
Volume58
Issue number23
DOIs
StatePublished - Dec 2 2019

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All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

Cite this

Feng, H. L., Deng, Z., Croft, M., Lapidus, S. H., Zu, R., Gopalan, V., Grams, C. P., Hemberger, J., Liu, S., Tyson, T. A., Frank, C. E., Jin, C., Walker, D., & Greenblatt, M. (2019). High-Pressure Synthesis and Ferrimagnetism of Ni3TeO6-Type Mn2ScMO6 (M = Nb, Ta). Inorganic chemistry, 58(23), 15953-15961. https://doi.org/10.1021/acs.inorgchem.9b02468