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Title: Room temperature ferrimagnetism and ferroelectricity in strained, thin films of BiFe0.5Mn 0.5O3

Journal Article · · Advanced Functional Materials
 [1];  [1];  [1];  [2];  [3];  [1];  [4];  [4];  [4];  [5];  [6];  [2];  [7];  [8];  [9];  [10];  [1];  [4];  [1]
  1. Univ. of Cambridge, Cambridge (United Kingdom). Dept. of Materials Science
  2. Rutherford Appleton Lab., Didcot (United Kingdom). ISIS, Science and Technology Facilities Council
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Center for Integrated Nanotechnologies
  5. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource
  6. Texas A & M Univ., College Station, TX (United States). Dept. of Electrical and Computer Engineering
  7. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division; Korea Basic Science Institute, Daejeon (Republic of Korea). Division of Electron Microscopic Research
  8. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
  9. Univ. of Glasgow, Glasgow (United Kingdom). SUPA School of Physics and Astronomy
  10. SciTech Daresbury, Warrington (United Kingdom). SuperSTEM

In this study, highly strained films of BiFe0.5Mn0.5O3 (BFMO) grown at very low rates by pulsed laser deposition were demonstrated to exhibit both ferrimagnetism and ferroelectricity at room temperature and above. Magnetization measurements demonstrated ferrimagnetism (TC ~ 600K), with a room temperature saturation moment (MS) of up to 90 emu/cc (~0.58μB/f.u) on high quality (001) SrTiO3. X-ray magnetic circular dichroism showed that the ferrimagnetism arose from antiferromagnetically coupled Fe3+ and Mn3+ . While scanning transmission electron microscope studies showed there was no long range ordering of Fe and Mn, the magnetic properties were found to be strongly dependent on the strain state in the films. The magnetism is explained to arise from one of three possible mechanisms with Bi polarization playing a key role. A signature of room temperature ferroelectricity in the films was measured by piezoresponse force microscopy and was confirmed using angular dark field scanning transmission electron microscopy. The demonstration of strain induced, high temperature multiferroism is a promising development for future spintronic and memory applications at room temperature and above.

Research Organization:
Univ. of Cambridge (United Kingdom); Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); Engineering and Physical Sciences Research Council; European Research Council (ERC)
Grant/Contract Number:
AC52-06NA25396; AC02-98CH10886; DMR-1007969; DMR-1401266; AC05-00OR22725
OSTI ID:
1212452
Alternate ID(s):
OSTI ID: 1265328
Journal Information:
Advanced Functional Materials, Vol. 24, Issue 47; ISSN 1616-301X
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 28 works
Citation information provided by
Web of Science

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Cited By (5)

Room temperature ferromagnetism in BiFe 1− x Mn x O 3 thin film induced by spin-structure manipulation journal May 2018
The Polar/Antipolar Phase Boundary of BiMnO 3 -BiFeO 3 -PbTiO 3 : Interplay among Crystal Structure, Point Defects, and Multiferroism journal July 2018
High-temperature Magnetodielectric Bi ( Fe 0.5 Mn 0.5 ) O 3 Thin Films with Checkerboard-Ordered Oxygen Vacancies and Low Magnetic Damping journal November 2018
Magnetic, electronic, and optical properties of double perovskite Bi 2 FeMnO 6 journal March 2017
Interface-Coupled BiFeO 3 /BiMnO 3 Superlattices with Magnetic Transition Temperature up to 410 K journal January 2016

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