skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Defect-Induced Hedgehog Polarization States in Multiferroics

Journal Article · · Physical Review Letters
 [1];  [2];  [3];  [3];  [2];  [4];  [4];  [5];  [2];  [6]
  1. Univ. of California, Irvine, CA (United States); Univ. of Michigan, Ann Arbor, MI (United States)
  2. Pennsylvania State Univ., University Park, PA (United States)
  3. Univ. of Michigan, Ann Arbor, MI (United States)
  4. Cornell Univ., Ithaca, NY (United States)
  5. Cornell Univ., Ithaca, NY (United States); Kavli Inst. at Cornell for Nanoscale Science
  6. Univ. of California, Irvine, CA (United States)

Continuous developments in nanotechnology require new approaches to materials synthesis that can produce novel functional structures. Here, we show that nanoscale defects, such as nonstoichiometric nanoregions (NSNRs), can act as nano-building blocks for creating complex electrical polarization structures in the prototypical multiferroic BiFeO3. An array of charged NSNRs are produced in BiFeO3 thin films by tuning the substrate temperature during film growth. Atomic-scale scanning transmission electron microscopy imaging reveals exotic polarization rotation patterns around these NSNRs. These polarization patterns resemble hedgehog or vortex topologies and can cause local changes in lattice symmetries leading to mixed-phase structures resembling the morphotropic phase boundary with high piezoelectricity. Phase-field simulations indicate that the observed polarization configurations are mainly induced by charged states at the NSNRs. Engineering defects thus may provide a new route for developing ferroelectric-or multiferroic-based nanodevices.

Research Organization:
Pennsylvania State Univ., University Park, PA (United States); Univ. of California, Irvine, CA (United States); Univ. of California, Oakland, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; National Science Foundation (NSF)
Grant/Contract Number:
FG02-07ER46417; SC0014430; AC02-05CH11231; ECCS-1542081; EEC-1160504; DMR0723032; OCI0821527; AC0205CH11231; FG0207ER46417
OSTI ID:
1600477
Alternate ID(s):
OSTI ID: 1429959
Journal Information:
Physical Review Letters, Vol. 120, Issue 13; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 52 works
Citation information provided by
Web of Science

References (29)

Spontaneous Vortex Nanodomain Arrays at Ferroelectric Heterointerfaces journal February 2011
Discovery of stable skyrmionic state in ferroelectric nanocomposites journal October 2015
Optical band gap of BiFeO3 grown by molecular-beam epitaxy journal April 2008
Spin Transfer Torques in MnSi at Ultralow Current Densities journal December 2010
The atomic structure and chemistry of Fe-rich steps on antiphase boundaries in Ti-doped Bi 0.9 Nd 0.15 FeO 3 journal June 2014
A Strain-Driven Morphotropic Phase Boundary in BiFeO3 journal November 2009
Giant Ferroelectric Polarization in Ultrathin Ferroelectrics via Boundary-Condition Engineering journal June 2017
Observation of polar vortices in oxide superlattices journal January 2016
Multiferroic BiFeO 3 films: domain structure and polarization dynamics journal December 2006
Ferroelectric domain structures of epitaxial (001) BiFeO3 thin films journal February 2007
Local stabilisation of polar order at charged antiphase boundaries in antiferroelectric (Bi 0.85 Nd 0.15 )(Ti 0.1 Fe 0.9 )O 3 journal August 2013
Spontaneous atomic-scale magnetic skyrmion lattice in two dimensions journal July 2011
Nanoscale Bi2FeO6−x precipitates in BiFeO3 thin films: a metastable Aurivillius phase journal July 2014
Physics and Applications of Bismuth Ferrite journal June 2009
Controlling magnetism with multiferroics journal October 2007
Direct Observation of Internal Spin Structure of Magnetic Vortex Cores journal October 2002
Direct observation of ferroelectric field effect and vacancy-controlled screening at the BiFeO3/LaxSr1−xMnO3 interface journal August 2014
Atomic Scale Structure Changes Induced by Charged Domain Walls in Ferroelectric Materials journal October 2013
Topology of the polarization field in ferroelectric nanowires from first principles journal May 2010
Atomic-Scale Mechanisms of Defect-Induced Retention Failure in Ferroelectrics journal May 2017
Lead-free piezoceramics – Where to move on? journal March 2016
Synthesis and ferroelectric properties of epitaxial BiFeO3 thin films grown by sputtering journal June 2006
Observation of a periodic array of flux-closure quadrants in strained ferroelectric PbTiO3 films journal April 2015
Phenomenological analysis of domain width in rhombohedral BiFeO 3 films journal October 2009
Emergent electrodynamics of skyrmions in a chiral magnet journal February 2012
Structure of a ferroelectric and ferroelastic monodomain crystal of the perovskite BiFeO3 journal December 1990
Hedgehog spin texture and Berry’s phase tuning in a magnetic topological insulator journal June 2012
Real-space observation of a two-dimensional skyrmion crystal journal June 2010
Probing oxygen vacancy concentration and homogeneity in solid-oxide fuel-cell cathode materials on the subunit-cell level journal August 2012

Cited By (9)

Intrinsic and extrinsic effects on the electrotoroidic switching in a ferroelectric notched nanodot by a homogeneous electric field journal January 2019
Control of Domain Structures in Multiferroic Thin Films through Defect Engineering journal August 2018
Rotational polarization nanotopologies in BaTiO 3 /SrTiO 3 superlattices journal January 2019
Theoretical guidelines to create and tune electric skyrmion bubbles journal February 2019
Controllable defect driven symmetry change and domain structure evolution in BiFeO 3 with enhanced tetragonality journal January 2019
Real-time studies of ferroelectric domain switching: a review journal November 2019
Design and Manipulation of Ferroic Domains in Complex Oxide Heterostructures journal September 2019
Design and Manipulation of Ferroic Domains in Complex Oxide Heterostructures text January 2019
Rotational polarization nanotopologies in BaTiO3/SrTiO3 superlattices text January 2019