A Pressure-Induced Inverse Order–Disorder Transition in Double Perovskites

Zheng Deng, Chang Jong Kang, Mark Croft, Wenmin Li, Xi Shen, Jianfa Zhao, Richeng Yu, Changqing Jin, Gabriel Kotliar, Sizhan Liu, Trevor A. Tyson, Ryan Tappero, Martha Greenblatt

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish (US)
Pages (from-to)8240-8246
Number of pages7
JournalAngewandte Chemie - International Edition
Volume59
Issue number21
DOIs
StatePublished - May 18 2020

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

Keywords

  • double perovskites
  • lattice compression
  • magnetic frustration
  • pressure-induced B-site disorder
  • statistical model

Fingerprint Dive into the research topics of 'A Pressure-Induced Inverse Order–Disorder Transition in Double Perovskites'. Together they form a unique fingerprint.

Cite this