The Magneto Optical Kerr Effect (MOKE) has garnered much attention for being a low cost and extremely sensitive magnetometer capable of local magnetic measurements with a shallow penetration depth. While this quality has been readily exploited, little attention has been devoted to the variation in angle of incidence and its effect on the penetration depth or any capabilities it has in measuring the depth sensitivity function. A Py/Nb/Co system was optimized for two-step switching within a range of a penetration depth of 270 Å by changing the thickness of the individual layers. MOKE measurement setup was modified by changing the angle of incidence from 20° to 52°. Increasing angle of incidence correlated with an increasing ratio of magnetization after first switching to the saturation magnetization. Distinct two-step hysteresis measurements change to a one-step hysteresis measurement with increasing angle of incidence, observing the laser penetration depth moving over a domain wall.
|Commitee:||Bill, Andreas, Kwon, Chuhee|
|School:||California State University, Long Beach|
|Department:||Physics and Astronomy|
|School Location:||United States -- California|
|Source:||MAI 56/01M(E), Masters Abstracts International|
|Keywords:||Angle, Kerr, Magneto optical|
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