####################################################
# Evguenia Karapetrova <jenia@anl.gov>
# requesting 3 days, at minimum=2 days
# beamline 33BM, Investigating the Temperature dependent structural transition of a BTO substrate on Fe3O4 film.
# instrument 33BM-C fourc
####################################################
# top:/home/www/beamtime-requests/req01221.txt
# UNICAT Member Beam Time Request  #1221
# created Mon Apr 28 11:46:00 CDT 2008
####################################################

apsrun:
	2008-02

beamline:
	33BM

collaboration:
	Yes

contact:
	jenia@anl.gov

days:
	3

description:
	A clear magnetic transition measured by XMCD at the Fe L edge has been identified at 280K at the 4IDC beamline at the APS. The sample was a thin (20nm) ferromagnetic  Fe3O4 film on BTO (001) substrate. BTO has a tetragonal to orthorhombic transition at ~280K. On passing through this transition a large effect on the magnetic signature of the film was measured. We propose to investigate the film structure around this temperature. We plan to measure the temperature dependent out of plane lattice length along with the in plane lattice lengths. A grazing incidence diffuse scattering study to measure strain may not be feasible this time but with positive initial results, this would be desirable, with a grazing incidence angle dependent study  in order to get depth profile.

equipment_required:
	Displex

experiment:
	Investigating the Temperature dependent structural transition of a BTO substrate on Fe3O4 film.

foreign_nationals:
	

hazards:
	

instrument:
	33BM-C fourc

instrument_other:
	

minimumdays:
	2

name:
	Evguenia Karapetrova

nonmembers:
	Philip Ryan
George Sterbinsky
David Keavney

submit:
	Submit

unacceptable_dates:
	19th June to 4 July and 24th July to 27th July

z34ID_details:
	


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