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Problems:
Problem 1
Determine value angle fi skrewing polarization plane for linear polarizated light a cross by magnetic layer in Internet Experiment. As a help in solving this problem we propose method described on WWW page: Investigate Faraday Effect - determine skrew angle for polarization plane in magnetic field.
Problem 2
Check Malus Law. You should record signal U from the light detector as a function of angle alfa1 (polarizer position) and compare experimental data with theoretical dependence. As a help in solving this problem we propose the method described on our WWW page: Checking Malus Law
Problem 3
Describe magnetization process in magnetic layer. You should record the histeresis loop and a few pictures of the magnetic structure in the optimal polarizer position. As a help in solving this problem, we propose the method described on our WWW page: Magnetization process.
Problem 4*
Determine two material parameters in a magnetic layer:
- Ms - Magnetization of the sample
- Sw - the energy of the domain wall
To solve this problem we suggest determing the period bettween dark and light of magnetic domains and initial susceptibility - chi0. Is is known thickness of magnetic layer of the sample si h = 10 micrometers. As a help in solving this problem we suggest going to the description of magnetic structures on the WWW page
Problem 5*
Obtain black and white images of the magnetic structure (without magnetic firlds) with the best aproximation of the structura pattern. You should record the image/images of the magnetic structure, and use numerical processing for this image. As a help in solving this problem we suggest going to the description of magnetic structure on our WWW page: We await original solutions from competition participants. Solutions should include:
- Input image/images data used for solution of the problem
- Output image in black and white
- Description of the applied procedure and a copy of the software used
* asterisked problems are difficult
Any questions and comments please send me via E-mail: exp@physics.uwb.edu.pl
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| Laboratory of Magnetism, Faculty of Physics, University of Białystok |
| Białystok Branch Polish Physical Society, |
| Ciołkowskiego 1L, 15-245 Białystok 15-424, Poland, E-mail: dobrog@uwb.edu.pl WWW: http://labfiz.uwb.edu.pl/exp/domeny01/ |
| Last modification: October 17, 2019 |