Local structure in dipole glasses
Journal Article
·
· Physical Review B
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Materials Measurement Science Division
- Univ. of California, Santa Cruz, CA (United States). Dept. of Physics
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- North Carolina State Univ., Raleigh, NC (United States). Dept. of Materials Science and Engineering
- George Mason Univ., Fairfax, VA (United States). Dept. of Mathematical Sciences
Local structures in cubic perovskite-type (Ba0.6Bi0.4)(Ti0.6Sc0.4)O3 solid solutions that exhibit reentrant dipole glass behavior have been studied with variable-temperature x-ray/neutron total scattering, extended x-ray absorption fine structure, and electron diffraction methods. Simultaneous fitting of these data using a reverse Monte Carlo algorithm provided instantaneous atomic configurations, which have been used to extract local displacements of the constituent species. The smaller Bi and Ti atoms exhibit probability density distributions that consist of 14 and 8 split sites, respectively. In contrast, Ba and Sc feature single-site distributions. The multisite distributions arise from large and strongly anisotropic off-center displacements of Bi and Ti. The cation displacements are correlated over a short range, with a correlation length limited by chemical disorder. The magnitudes of these displacements and their anisotropy, which are largely determined by local chemistry, change relatively insignificantly on cooling from room temperature. The structure features a nonrandom distribution of local polarization with low-dimensional polar clusters that are several unit cells in size. In situ measurements of atomic pair-distribution function under applied electric field were used to study field-induced changes in the local structure; however, no significant effects besides lattice expansion in the direction of the field could be observed up to electric-field values of 4 kVmm-1.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- AC02-06CH11357; AC02-76SF00515; AC02-98CH10886; AC52-06NA25396
- OSTI ID:
- 1344890
- Alternate ID(s):
- OSTI ID: 1242612
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 10 Vol. 93; ISSN 2469-9950; ISSN PRBMDO
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Time-of-flight neutron total scattering with applied electric fields: Ex situ and in situ studies of ferroelectric materials
|
journal | September 2018 |
Field-induced polarization rotation and phase transitions in 0.70 Pb ( M g 1 / 3 N b 2 / 3 ) O 3 − 0.30 PbTi O 3 piezoceramics observed by in situ high-energy x-ray scattering
|
journal | June 2018 |
Effect of A‐site substitutions on energy storage properties of BaTiO 3 ‐BiScO 3 weakly coupled relaxor ferroelectrics
|
journal | April 2019 |
Similar Records
Electric field dependent local structure of
Enormous electron-electron scattering in the filled-cage cubic compound
Lattice relaxations around individual dopant atoms in
Journal Article
·
Sun Jul 30 20:00:00 EDT 2017
· Physical Review B
·
OSTI ID:1376340
Enormous electron-electron scattering in the filled-cage cubic compound
Journal Article
·
Sun Oct 06 20:00:00 EDT 2019
· Physical Review Materials
·
OSTI ID:1570005
Lattice relaxations around individual dopant atoms in
Journal Article
·
Thu Oct 31 20:00:00 EDT 2019
· Physical Review Materials
·
OSTI ID:1593373