Effect of Oxygen Interstitial Ordering on Multiple Order Parameters in Rare Earth Ferrite

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Yang Zhang
  • Wenbin Wang
  • Wandong Xing
  • Shaobo Cheng
  • Shiqing Deng
  • Manuel Angst
  • Chu-Ping Yu
  • Fanli Lan
  • Zhiying Cheng
  • David Mandrus
  • Brian Sales
  • Jian Shen
  • Nyan-Hwa Tai
  • Rong Yu
  • Jing Zhu

Detail(s)

Original languageEnglish
Article number247601
Journal / PublicationPhysical Review Letters
Volume123
Issue number24
Online published11 Dec 2019
Publication statusPublished - 13 Dec 2019
Externally publishedYes

Abstract

Oxygen interstitials and vacancies play a key role in modulating the microstructure and properties of nonstoichiometric oxide systems, such as those used for superconductors and multiferroics. Key to understanding the tuning mechanisms resulting from oxygen doping is a knowledge of the precise positions of these lattice defects, and of the interaction both between these defects and with many order parameters. Here, we report how such information can, for the first time, be obtained from a sample of LuFe2O4.22 using a range of techniques including advanced electron microscopy, atomic-resolution spectroscopy, and density functional theory calculations. The results provide quantitative atomic details of the crystal unit cell, together with a description of the ferroelastic, ferroelectric, and ferromagnetic order parameters. We elucidate also the interaction between these order parameters and the positions of the oxygen interstitials in the oxygen-enriched sample. The comprehensive analysis of oxygen interstitial ordering provides insights into understanding the coupling among different degrees of freedom in rare earth ferrites and demonstrates that oxygen content regulation is a powerful tool for tuning the microstructure and properties for this class of quantum material.

Citation Format(s)

Effect of Oxygen Interstitial Ordering on Multiple Order Parameters in Rare Earth Ferrite. / Zhang, Yang; Wang, Wenbin; Xing, Wandong et al.
In: Physical Review Letters, Vol. 123, No. 24, 247601, 13.12.2019.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review