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Title: Nanosecond Optically Induced Phase Transformation in Compressively Strained BiFeO 3 on LaAlO 3

Journal Article · · Physical Review Letters
 [1];  [1];  [1];  [2];  [3];  [2];  [4];  [5];  [6];  [6];  [6];  [1]
  1. Univ. of Wisconsin-Madison, Madison, WI (United States)
  2. Univ. of Science and Technology of China, Anhui (China)
  3. ID01/ESRF, Grenoble Cedex (France)
  4. Harbin Inst. of Technology, Shenzhen (China)
  5. Southern Univ. of Science and Technology, Guangdong (China)
  6. Argonne National Lab. (ANL), Argonne, IL (United States)

Above-band-gap optical illumination of compressively strained BiFeO3 induces a transient reversible transformation from a state of coexisting tilted tetragonal-like and rhombohedral-like phases to an untilted tetragonal-like phase. Time-resolved synchrotron x-ray diffraction reveals that the transformation is induced by an ultrafast optically induced lattice expansion that shifts the relative free energies of the tetragonal-like and rhombohedral-like phases. The transformation proceeds at interfaces between regions of the tetragonal-like phase and regions of a mixture of tilted phases, consistent with the motion of a phase boundary. The optically induced transformation demonstrates that there are new optically driven routes towards nanosecond-scale control of phase transformations in ferroelectrics and multiferroics.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Science Foundation (NSF); Harbin Institute of Technology; National Science Foundation of China; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Key Basic Research Program of China
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1558805
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 4 Vol. 123; ISSN 0031-9007; ISSN PRLTAO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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