Advanced   Register
IMR OpenIR  > 中国科学院金属研究所  > 期刊论文

题名: Coexistence of rhombohedral and orthorhombic phases in ultrathin BiFeO3 films driven by interfacial oxygen octahedral coupling
作者: Han, MJ;  Wan, YJ;  Ma, DS;  Zhu, YL;  Tang, YL;  Liu, Y;  Zhang, NB;  Ma, JY;  Ma, XL
发表日期: 2018-2-15
摘要: Coexistence of two phases creates a morphotropic phase boundary in perovskite oxides, which can provide large piezoelectric response, generating it a well suited system for probe-based memories and actuator applications. The coexistence of two phases in thin films is proposed to be induced by epitaxial constraints from substrates or chemical compositional modifications by substitution. In this work, we found a new formation mechanism of two-phase coexistence driven by interfacial oxygen octahedral coupling (OOC) in oxide heterostructures. We fabricated a series of BiFeO3 (BFO) ultrathin films on various orthorhombic substrates exerting from tensile to compressive strains by Pulsed Laser Deposition (PLD) techniques. Aberration-corrected transmission electron microscopy demonstrates that the lattice rotation and oxygen octahedral rotation (OOR) patterns transfer from these substrates to BFO films in about 3 unit cells while an orthorhombic (Prima) phase forms at the interface due to OOC. This Prima phase is non-polar, which differs from polar phases of Ima2 or Pmc2(1) when a large tensile strain is imposed onto BFO. First-principles calculations reproduce these experimental results perfectly. This phase transition occurs when BFO films are under both tensile and compressive strains suggesting that OOC alone can induce phase transition in ultrathin BFO films. Such coexistence of two phases may have many potential applications in the field of electronics, such as ferroelectric sensors and actuators. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Appears in Collections:中国科学院金属研究所_期刊论文

Files in This Item:

There are no files associated with this item.

Recommended Citation:
Han, MJ,Wan, YJ,Ma, DS,et al. Coexistence Of Rhombohedral And Orthorhombic Phases In Ultrathin Bifeo3 Films Driven By Interfacial Oxygen Octahedral Coupling[J]. Acta Materialia,2018,145:220-226.

SCI Citaion Data:
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Han, MJ]'s Articles
 [Wan, YJ]'s Articles
 [Ma, DS]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Han, MJ]‘s Articles
 [Wan, YJ]‘s Articles
 [Ma, DS]‘s Articles
Scirus search
 Similar articles in Scirus
Related Copyright Policies
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to  Add to Digg  Add to Reddit 
所有评论 (0)
内 容:
Email:  *
验证码:   刷新
标 题:
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.



Valid XHTML 1.0!
Copyright © 2007-2018  中国科学院金属研究所  -Feedback
Powered by CSpace