Date of Award

Spring 2020

Document Type

Open Access Dissertation

Department

Physics and Astronomy

First Advisor

Thomas M. Crawford

Abstract

Here we seek to take a traditional Magneto Optic Kerr Effect (MOKE) experimental design, useful for local magnetization measurements, and apply it to measuring aligned multiferroic Janus nano fiber agglomerates. In order to achieve this we modify the traditional MOKE geometry by measuring our Kerr rotation from collimated scattered light, rather than the conventional specular reflection. Using various techniques to improve signal to noise ratio (SNR), we extend the application of this scattered MOKE geometry to build families of First Order Reversal Curves (FORC). Using an alternative analysis technique, FORC curves are processed and become a FORC diagram, which is shown to look very similar to FORC diagrams created with literature suggested methods. From the FORC diagram we gain insights into how the coercivities are distributed within the aligned agglomerates and how their magnetization evolves as a function of applied field.

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Physics Commons

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