JAMI VALENTINE
Doctoral Candidate in the Department of Physics and Astronomy at Johns Hopkins University
Measurements of the spin polarization P have been performed on c–axis gadolinium and dysprosium thin films, epitaxially grown on
sapphire substrates with a W(110) seed layer. Magnetometry measurements show that the Gd layer is ferromagnetic with TC ≈ 293 K, whereas Dy is antiferromagnetic below TN ≈ 180 K followed by a transition to ferromagnetic ordering at a lower temperature. The values of spin polarization of c–axis epitaxial gadolinium and dysprosium films were obtained using the point contact Andreev reflection (PCAR) technique with quantitative analyses.
This work has been conducted under the guidance of the author’s thesis advisor, Professor Chia-Ling Chien
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