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Title: Single-crystal structure of HoBaCo4O7 at ambient conditions, at low temperature, and at high pressure
Authors: Juarez-Arellano, EA
Friedrich, A
Wilson, DJ
Wiehl, L
Morgenroth, W
Winkler, B
Avdeev, M
Macquart, RB
Ling, CD
Keywords: Phase transformations
Crystal structure
Temperature range 0065-0273 K
Pressure range mega pa 10-100
Issue Date: 18-Feb-2009
Publisher: American Physical Society
Citation: Juarez-Arellano, E. A., Friedrich, A., Wilson, D. J., Wiehl, L., Morgenroth, W., Winkler, B., Avdeev, M., Macquart, R. B., & Ling, C. D. (2009) Single-crystal structure of HoBaCo 4 O 7 at ambient conditions, at low temperature, and at high pressure. Physical Review B, 79(6), 064109. doi:10.1103/PhysRevB.79.064109
Abstract: We show that the correct space group of HoBaCo4O7 at ambient conditions is P63mc and that no temperature-induced or pressure-induced structural phase transition occurs down to 100 K or up to 9 GPa. The ompressibility of HoBaCo4O7 is mainly determined by a combination of bond compression and changes in the three-membered and six-membered rings of the kagomé layers. HoBaCo4O7 is more compressible than structurally related compounds due to the comparatively compressible Co-O bonds. The structural analysis allows us to propose an atomistic model for the extremely high oxygen incorporation capability of HoBaCo4O7. ©2009 American Physical Society
ISSN: 2469-9969
Appears in Collections:Journal Articles

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