Back to Search
Start Over
Evaluation of the Structural Phase Transition in Multiferroic (Bi1−x Prx)(Fe0.95 Mn0.05)O3 Thin Films by A Multi-Technique Approach Including Picosecond Laser Ultrasonics
- Source :
- Applied Sciences, Applied Sciences, MDPI, 2019, 9 (4), pp.736. ⟨10.3390/app9040736⟩, Applied Sciences, Vol 9, Iss 4, p 736 (2019), Volume 9, Issue 4
- Publication Year :
- 2019
- Publisher :
- HAL CCSD, 2019.
-
Abstract
- Picosecond laser ultrasonics is an experimental technique for the generation and detection of ultrashort acoustic pulses using ultrafast lasers. In transparent media, it is often referred to as time-domain Brillouin scattering (TDBS). It provides the opportunity to monitor the propagation of nanometers-length acoustic pulses and to determine acoustical, optical, and acousto-optical parameters of the materials. We report on the application of TDBS for evaluating the effect of Praseodymium (Pr) substitution on the elasticity of multiferroic (Bi1&minus<br />xPrx)(Fe0.95Mn0.05)O3 (BPFMO) thin films. The films were deposited on Si and LaAlO3 (LAO) substrates by a sol-gel method. X-ray diffraction and Raman spectra revealed earlier that a phase transition from rhombohedral to tetragonal structure occurs at about 15% Pr substitution and is accompanied by the maxima of remnant magnetization and polarization. Combining TDBS with optical spectral reflectometry, scanning electron microscopy, and topographic measurements by atomic force microscopy, we found that the structural transition is also characterized by the maximum optical dielectric constant and the minimum longitudinal sound velocity. Our results, together with earlier ones, suggest that BiFeO3-based films and ceramics with compositions near phase boundaries might be promising materials for multifunctional applications.
- Subjects :
- Diffraction
Phase transition
picosecond laser ultrasonics
structural phase transition
Materials science
multiferroics
02 engineering and technology
01 natural sciences
lcsh:Technology
law.invention
[PHYS.PHYS.PHYS-ED-PH]Physics [physics]/Physics [physics]/Physics Education [physics.ed-ph]
lcsh:Chemistry
symbols.namesake
law
Brillouin scattering
time-domain Brillouin scattering
0103 physical sciences
General Materials Science
Thin film
010306 general physics
Reflectometry
Instrumentation
lcsh:QH301-705.5
ComputingMilieux_MISCELLANEOUS
Fluid Flow and Transfer Processes
non-destructive depth-profiling
business.industry
lcsh:T
Process Chemistry and Technology
General Engineering
[CHIM.MATE]Chemical Sciences/Material chemistry
021001 nanoscience & nanotechnology
Laser
multi-technique approach
lcsh:QC1-999
[PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph]
Computer Science Applications
[CHIM.POLY]Chemical Sciences/Polymers
lcsh:Biology (General)
lcsh:QD1-999
lcsh:TA1-2040
symbols
Optoelectronics
0210 nano-technology
business
Raman spectroscopy
lcsh:Engineering (General). Civil engineering (General)
Ultrashort pulse
lcsh:Physics
Subjects
Details
- Language :
- English
- ISSN :
- 20763417
- Database :
- OpenAIRE
- Journal :
- Applied Sciences, Applied Sciences, MDPI, 2019, 9 (4), pp.736. ⟨10.3390/app9040736⟩, Applied Sciences, Vol 9, Iss 4, p 736 (2019), Volume 9, Issue 4
- Accession number :
- edsair.doi.dedup.....d1e9ab53796dc00dffd2031965ebaaad