Magneto-Optics Kerr Effect Instrumentation
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Date
2015
Department
Physics
Program
Master of Science
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This item is made available by Morgan State University for personal, educational, and research purposes in accordance with Title 17 of the U.S. Copyright Law. Other uses may require permission from the copyright owner.
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Abstract
Progress in science technology requires new tools to study novel magnetic thin films surfaces and interfaces. Magneto-Optic Kerr Effect (MOKE) instrument is an ideal tool to study nanometric magnetic thin films. MOKE instrument was built to study properties of epitaxial nanometric thin films deposited using magnetron sputtering system. The objective of this project is to build MOKE instrument to study tunneling magneto resistance (TMR) samples of (Fe /MgO/ Fe) on lattice-matched substrates of MgO (100) synthesized at several substrate temperatures. MOKE was used to determine surface magnetic anisotropy and magnetic symmetry of these novel materials. In addition to MOKE vibrating sample magnetometer (VSM) and torque magnetometer (TMM) were used to further study the overall magnetic properties of the TMR samples. Two fold magnetic symmetries was observed in all samples. It was more pronounced on samples synthesized at higher temperatures. The coercive filed was at its highest value for a sample synthesized at 1000C.