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SUMMARY:Depth profiling of LE-$\\mu$SR parameters with musrfit
DTSTART;VALUE=DATE-TIME:20220901T164000Z
DTEND;VALUE=DATE-TIME:20220901T170000Z
DTSTAMP;VALUE=DATE-TIME:20220826T121940Z
UID:indico-contribution-3826@indico.stfc.ac.uk
DESCRIPTION:Speakers: Maria Mendes Martins (Laboratory for Muon Spin Spect
 roscopy\, Paul Scherrer Institute)\nThe study of thin-film and multi-layer
 ed structures with nanometer resolution is possible with low energy $\\mu$
 SR (LE-$\\mu$SR). The average stopping depth of the positive muons with im
 planted energies between 1 and 25 keV extends over a few nanometers and de
 pends on the density of the probed material. \nModeling of the measured $\
 \mu$SR parameters such as diamagnetic asymmetry and relaxation rate as a f
 unction of sample depth can be obtained from a series of experimental impl
 antation energy measurements and its correlation with the simulated stoppi
 ng profiles. The fitting approach assumes a sharp transition between regio
 ns with distinct properties\, such as layers with different materials\, de
 fects\, and intermixing near the interface\, or\, depletion regions where 
 the charge carriers concentrations may change. The fitting method\, previo
 usly developed in matlab\, is being implemented in musrfit\, a free $\\mu$
 SR data analysis framework written in C++. The main goal is to make this f
 itting method widely available for energy dependent measurements and incre
 ase the modeling possibilities within musrfit.\nWe will present the added 
 functionality\, its implementation\, and different examples where the syst
 ems measured with LE-$\\mu$SR could be better understood by quantifying th
 e width of physically relevant regions.\n\nhttps://indico.stfc.ac.uk/event
 /53/contributions/3826/
LOCATION:Science and Technology Campus\, University of Parma
URL:https://indico.stfc.ac.uk/event/53/contributions/3826/
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