A Pressure-Induced Inverse Order–Disorder Transition in Double Perovskites
Document Type
Article
Publication Date
5-18-2020
Abstract
Given the consensus that pressure improves cation ordering in most of known materials, a discovery of pressure-induced disordering could require recognition of an order–disorder transition in solid-state physics/chemistry and geophysics. Double perovskites Y2CoIrO6 and Y2CoRuO6 polymorphs synthesized at 0, 6, and 15 GPa show B-site ordering, partial ordering, and disordering, respectively, accompanied by lattice compression and crystal structure alteration from monoclinic to orthorhombic symmetry. Correspondingly, the long-range ferrimagnetic ordering in the B-site ordered samples are gradually overwhelmed by B-site disorder. Theoretical calculations suggest that unusual unit-cell compressions under external pressures unexpectedly stabilize the disordered phases of Y2CoIrO6 and Y2CoRuO6.
Identifier
85083222684 (Scopus)
Publication Title
Angewandte Chemie International Edition
External Full Text Location
https://doi.org/10.1002/anie.202001922
e-ISSN
15213773
ISSN
14337851
PubMed ID
32185857
First Page
8240
Last Page
8246
Issue
21
Volume
59
Grant
DMR‐1809931
Fund Ref
National Science Foundation
Recommended Citation
Deng, Zheng; Kang, Chang Jong; Croft, Mark; Li, Wenmin; Shen, Xi; Zhao, Jianfa; Yu, Richeng; Jin, Changqing; Kotliar, Gabriel; Liu, Sizhan; Tyson, Trevor A.; Tappero, Ryan; and Greenblatt, Martha, "A Pressure-Induced Inverse Order–Disorder Transition in Double Perovskites" (2020). Faculty Publications. 5301.
https://digitalcommons.njit.edu/fac_pubs/5301
