Date of Award

12-2014

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Physics

First Advisor

Gregory G. Kenning, Ph.D.

Second Advisor

Muhammad Numan, Ph.D.

Third Advisor

Majid Karimi, Ph.D.

Fourth Advisor

Vythilingam J. Wijekumar, Ph.D.

Abstract

I performed a systematic study on Co/Sb superlattices varying Antimony (Sb) thickness keeping Cobalt (Co) thickness constant at 1 nm. Here I studied the decay of resistivity of those samples. To make those samples I deposited 10 bilayers of Co and Sb at 500 C onface of silicon substrate in an Edward model E306A e-beam evaporator. After making the sample we measured the decay of resistance using Vibrating Sample Magnetometer (VSM) with Magneto Resistance (MR) option. We made samples of 8 different thickness of antimony, ranging from 0.5 nm to 5.0 nm. We measured the decay of electrical resistance of our samples as a function of time and temperature. In this thesis we measured the decay of resistance of all of the samples at various temperatures like 320K, 340K, 360K, 380K, and 400K. Then we plot decays of resistances on log time scale in order to inspect the variable time needed for a certain thickness of Sb to decay. We also made Arrhenius plot of our data and analyzed them.

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