#################################################### # John Budai # requesting 3 days, at minimum=2 days # beamline 34ID-E, Superlattice Symmetry in a Phase-Separated Manganite System # instrument 34ID-E microbeam #################################################### # top:/home/www/beamtime-requests/req01227.txt # UNICAT Member Beam Time Request #1227 # created Fri May 02 16:56:48 CDT 2008 #################################################### apsrun: 2008-02 beamline: 34ID-E collaboration: No collaborator_Wenjun: ON contact: budaijd@ornl.gov days: 3 description: We will use spatially-resolved, 3D x-ray microdiffraction to study the symmetry of superlattice reflections in the phase-separated, directionally-solidified transition-metal oxide system, (Lu,LaSr)MnO. We have previously observed superlattice reflections with twofold symmetry in a particular region of the sample containing LaSrMnO plate-shaped domains. We will locate other domains in the same sample which have lamellae oriented differently. We will then search for superlattice reflections and determine whether the superlattice symmetry is consistently associated with the local domain orientation or with the macroscopic sample orientation. We will also measure the symmetry of the strain fields of both phases in order to understand the origin of the superlattice reflections. equipment_required: experiment: Superlattice Symmetry in a Phase-Separated Manganite System foreign_nationals: hazards: none instrument: 34ID-E microbeam instrument_other: minimumdays: 2 name: John Budai new_request: ON nonmembers: submit: Submit unacceptable_dates: July 19 to August 8, 2008 z34ID_change_undulator: yes z34ID_details: These experiments on 34ID-E may require changing the undulator gap continuously during some scans. Also, the beam may need to be steered to ~10 microradians off-axis to enhance intensity in the ~14-15 keV range. z34ID_on_axis: no z34ID_parasitic: no z34ID_taper: no #REMOTE_HOST: jdbmbp.ornl.gov #REMOTE_ADDR: 160.91.156.174 #CONTENT_LENGTH: 1496 #HTTP_REFERER: http://www.uni.aps.anl.gov/admin/unireq.html #HTTP_USER_AGENT: Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-US; rv:1.8.1.14) Gecko/20080404 Firefox/2.0.0.14