TY  - JOUR
AU  - Zhang, Yang
AU  - Wang, Wenbin
AU  - Xing, Wandong
AU  - Cheng, Shaobo
AU  - Deng, Shiqing
AU  - Angst, Manuel
AU  - Yu, Chu-Ping
AU  - Lan, Fanli
AU  - Cheng, Zhiying
AU  - Mandrus, David
AU  - Sales, Brian
AU  - Shen, Jian
AU  - Zhong, Xiaoyan
AU  - Tai, Nyan-Hwa
AU  - Yu, Rong
AU  - Zhu, Jing
TI  - Effect of Oxygen Interstitial Ordering on Multiple Order Parameters in Rare Earth Ferrite
JO  - Physical review letters
VL  - 123
IS  - 24
SN  - 1079-7114
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2019-06512
SP  - 247601
PY  - 2019
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000502130400010
DO  - DOI:10.1103/PhysRevLett.123.247601
UR  - https://juser.fz-juelich.de/record/867914
ER  -