High-Pressure Synthesis and Ferrimagnetism of Ni 3 TeO 6 -Type Mn 2 ScMO 6 (M = Nb, Ta)

The corundum-related oxides Mn ScNbO and Mn ScTaO were synthesized at high pressure and high temperature (6 GPa and 1475 K). Analysis of the synchrotron powder X-ray diffraction shows that Mn ScNbO and Mn ScTaO crystallize in Ni TeO -type noncentrosymmetric crystal structures with space group 3. The...

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Bibliographic Details
Published in:Inorganic chemistry 2019-12, Vol.58 (23), p.15953-15961
Main Authors: Feng, Hai L, Deng, Zheng, Croft, Mark, Lapidus, Saul H, Zu, Rui, Gopalan, Venkatraman, Grams, Christoph P, Hemberger, Joachim, Liu, Sizhan, Tyson, Trevor A, Frank, Corey E, Jin, Changqing, Walker, David, Greenblatt, Martha
Format: Article
Language:English
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Summary:The corundum-related oxides Mn ScNbO and Mn ScTaO were synthesized at high pressure and high temperature (6 GPa and 1475 K). Analysis of the synchrotron powder X-ray diffraction shows that Mn ScNbO and Mn ScTaO crystallize in Ni TeO -type noncentrosymmetric crystal structures with space group 3. The asymmetric crystal structure was confirmed by second harmonic generation measurement. X-ray absorption near-edge spectroscopies indicate formal valence states of Mn Sc Nb O and Mn Sc Ta O , also supported by the calculated bond valence sums. Both samples are electrically insulating. Magnetic measurements indicate that Mn ScNbO and Mn ScTaO order ferrimagnetically at 53 and 50 K, respectively, and Mn ScTaO is found to have a field-induced magnetic transition.
ISSN:0020-1669
1520-510X
DOI:10.1021/acs.inorgchem.9b02468