####################################################
# Oleg Shpyrko <oshpyrko@anl.gov>
# requesting 6 days, at minimum=4 days
# beamline 34ID-C, Lensless 3D Imaging of Nanoscale Dynamics of Antiferromagnetic Domain Walls in Chromium
# instrument 34ID-C coherent
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# top:/home/www/beamtime-requests/req01077.txt
# UNICAT Member Beam Time Request  #1077
# created Tue Dec 12 15:26:06 CST 2006
####################################################

apsrun:
	2007-01

beamline:
	34ID-C

collaboration:
	No

collaborator_Paul:
	ON

contact:
	oshpyrko@anl.gov

days:
	6

description:
	We propose to apply lensless imaging technique based on phase retrieval analysis of coherent diffraction speckle pattern to study dynamics of antiferromagnetic domain walls in elemental chromium. Full 3D visualization of domain wall fluctuations will provide unique insight into quantum mechanical behavior of this and other similar magnetic systems. 

In previous experiments carried out at the APS beamline 8-ID, we studied domain wall dynamics in a bulk sample of antiferromagnetic chromium using the technique of X-ray Photon Correlation Spectroscopy (XPCS). The timescale of fluctuations slows down as the temperature is decreased, saturating at 3,000 s at the lowest temperatures of our measurements (4K-30K). Having quantified the timescales of fluctuations of speckle in reciprocal (momentum) space, but not the arrangement or mechanisms of domain formation and distribution in real space, it is now desirable to compliment our XPCS studies with a tool capable of providing such real-space 3D maps of domains.

equipment_required:
	

experiment:
	Lensless 3D Imaging of Nanoscale Dynamics of Antiferromagnetic Domain Walls in Chromium

foreign_nationals:
	

hazards:
	cryogenics (liquid He flow cryostat).

instrument:
	34ID-C coherent

instrument_other:
	

minimumdays:
	4

name:
	Oleg Shpyrko

nonmembers:
	

submit:
	Submit

unacceptable_dates:
	

z34ID_change_undulator:
	no

z34ID_details:
	

z34ID_parasitic:
	yes


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