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Optimisation of measuring magneticproperties of micro-structuresusing the magneto-optic Kerr effect
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
2016 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

Magnetic storage means storage of data using magnetised medium and is widespreadover the world today, especially in hard disk drives. Using this kind of storagerequires knowledge about these materials. A way to study thin magnetic materials isto use MOKE(magneto optical Kerr effect). A Moke-system is a setup to measure thinmagnetic films by shooting a laser and analyze the reflected beam.The purpose of this report is to document and if possible improve a MOKE-system,named HOMER. This includes temperature regulation, filters, amplifiers, opticalchopper, Helmholtz coils and a laser. HOMER was documented and some changeswere made. The PID-parameters were set successfully. A low pass filter wasremoved, which decreased the noise. Using an optical chopper and lock in amplifierhowever did not decrease the noise. A labview program was written to demagnetizethe samples in a certain time which seemed to work properly. The hall probe in thesystem was successfully calibrated.

Place, publisher, year, edition, pages
2016. , 27 p.
Series
TVE, 160 49 JUNI
Keyword [sv]
moke, magnetism, elektromagnetism
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:uu:diva-306118OAI: oai:DiVA.org:uu-306118DiVA: diva2:1039649
Educational program
Master Programme in Engineering Physics
Supervisors
Examiners
Available from: 2016-11-03 Created: 2016-10-24 Last updated: 2016-11-03Bibliographically approved

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Atom and Molecular Physics and Optics

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