To view this presentation:

  • If you have an MRS account, click the Login button above.
  • New to MRS?  Create a free account here



  0       0

2015 MRS Spring Meeting


TT13.05 - Polarization Dynamics in Ferroelectric Relaxors Studied by Multidimensional Piezoresponse Force Microscopy


Apr 9, 2015 2:45pm ‐ Apr 9, 2015 3:00pm

Description

The unique properties of the ferroelectric relaxors are thought to be due to compositional and charge disorder in these systems [1,2], which can manifest at atomic and mesoscopic length scales. However, little is known about polarization dynamics in the prototypical ferroelectric relaxor system (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-xPT) at the mesoscopic level. Here, we develop a multidimensional piezoresponse force microscopy (PFM) based technique [3] to study the voltage and time dependent response of the single crystal relaxor PMN-0.28PT. Measurements reveal that for small bias, there is little perturbation, but the relaxation increases for larger bias pulse amplitudes. Furthermore, mesoscale heterogeneity is evident in relaxation amplitudes, with two distinct amplitudes present. To gain insight into the disorder, the entire dataset was further analyzed by independent component analysis. These reveal the presence of a disorder component to the response, which is found to be inversely correlated to the piezoresponse at that area. The difference is postulated to arise from the mixture of rhombohedral and field-induced tetragonal phases present in the probed volume of the tip, which can vary spatially depending on local defects, chemical inhomogeneity and elastic clamping effects. These studies show the utility of PFM-based spectroscopies in combination with big-data style analyses in mapping the disorder that underpins functionality of the ferroelectric relaxors. This research was sponsored by the Division of Materials Sciences and Engineering, BES, DOE (RKV, SVK). A portion of this research was conducted at and partially supported by (SJ, MO) the Center for Nanophase Materials Sciences, which is a DOE Office of Science User Facility. NBG acknowledges funding from the US national Science Foundation through grant # DMR-1255379. References 1. A. A. Bokov, Z. �G. Ye, J. Mater. Sci. 41, 31 (2006). 2. F. Jiang, S. Kojima, C. Zhao, C. Feng, Appl. Phys. Lett 79, 3938 (2001). 3. S. V. Kalinin, B. J. Rodriguez, J. Budai, S. Jesse, A. Morozovska, A. A. Bokov, Z.-G. Ye, Phys. Rev. B. 81, 064107 (2010).

Speaker(s):

You must be logged in and own this session in order to post comments.

Print Certificate
Review Answers
Print Transcript
Completed on: token-completed_on
Review Answers
Please select the appropriate credit type:
/
test_id: 
credits: 
completed on: 
rendered in: 
* - Indicates answer is required.
token-content
token-speaker-name image
token-speaker-name
token-index
token-content
token-index
token-content
token-index
token-content
token-index
token-content
token-index
token-content
token-index
token-content
/
/
token-index
token-content