####################################################
# John Budai <budaijd@ornl.gov>
# requesting 5 days, at minimum=3 days
# beamline 34ID-E, Strain Domains in Ferroelectric Systems
# instrument 34ID-E microbeam
####################################################
# top:/home/www/beamtime-requests/req01250.txt
# UNICAT Member Beam Time Request  #1250
# created Tue Sep 09 16:51:40 CDT 2008
####################################################

apsrun:
	2008-03

beamline:
	34ID-E

collaboration:
	No

collaborator_Wenjun:
	ON

contact:
	budaijd@ornl.gov

days:
	5

description:
	Strain fields are directly coupled to the local polarization in ferroelectric materials. We will study spatially-resolved strain inhomogeneities in a true ferroelectric (BaTiO3) and in a relaxor ferroelectric material, Pb(MgNb)O3-PbTiO3 (PMN-PTO). Initial measurements will use depth-resolved 3D microdiffraction to measure the strain tensor near 90-degree domain boundaries in a BaTiO3 crystal with domain boundaries aligned in a single direction (grown by A. Bokov, Simon Fraser Univ). The spatial extent of residual strains near domain boundaries remains controversial. Subsequent microdiffraction measurements will investigate the temperature-dependent behavior of polarization domains in the relaxor ferroelectric PMN-PTO. Unlike a true ferroelectric, the ergodic phase of PMN-PTO is believed to possess mobile domains with two local order parameters, polarization strength and polarization orientation. When cooled, the domains become frozen in the nonergodic phase. These x-ray studies will be compared with Piezo Force Microscopy (PFM) maps of the local polarization domains.

equipment_required:
	

experiment:
	Strain Domains in Ferroelectric Systems

foreign_nationals:
	

hazards:
	none

instrument:
	34ID-E microbeam

instrument_other:
	

minimumdays:
	3

name:
	John Budai

new_request:
	ON

nonmembers:
	

submit:
	Submit

unacceptable_dates:
	October 1-10 and October 20-26

z34ID_change_undulator:
	yes

z34ID_details:
	These experiments on 34ID-E will require on-axis beam (for monochromatic measurements) and changing undulator settings.  The conditions will not be ideal for operations on 34ID-C.

z34ID_on_axis:
	yes

z34ID_parasitic:
	no

z34ID_taper:
	no


#REMOTE_HOST: jdbmbp.ornl.gov
#REMOTE_ADDR: 160.91.156.174
#CONTENT_LENGTH: 1763
#HTTP_REFERER: http://www.uni.aps.anl.gov/admin/unireq.html
#HTTP_USER_AGENT: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.4; en-US; rv:1.9.0.1) Gecko/2008070206 Firefox/3.0.1