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Add to Calendar 2/16/2018 2:00 pm 2/16/2018 America/Chicago Special Condensed Matter Seminar: "Fabrication and Control of Pd,Fe Heterostructures." DESCRIPTION:

The goal of this research was to use multiferroic (ferroelectric/ferromagnetic) thin-film interfaces to control the magnetization of materials of interest for perpendicular recording. Using magnetostrictive coupling present in thin films of Pd/Fe compounds deposited onto ferroelectric Barium-Titanate (BTO) substrates, we were able to tune the out-ofplane magnetization of the Pd/Fe layer using substrate-induced epitaxial strain. This result is important because we have been able to demonstrate the elastic control of the perpendicular magnetic anisotropy of Palladium-Iron (Pd,Fe) films deposited onto BTO (100) substrate.

In order to enhance the substrate-film coupling present in the heterostructures, we sought to fabricate an ordered Pd3Fe film onto a cubic perovskite. We were able to achieve this objective by promoting the interdiffusion of an Fe/Pd multilayer heterostructures deposited onto SrTiO3 (100) substrates. The heterostructures were fabricated in Ultra-High Vacuum by depositing alternating Fe and Pd layers onto the SrTiO3 substrates. Once deposited, we were able to facilitate the formation of an Pd3Fe layer by annealing the structures above the formation temperature of Pd3Fe. Using both X-Ray diffraction and Reflection High-Energy Electron Diffraction, we were able to confirm that the films were both epitaxial and majority Pd3Fe. This research is significant because it provides an innovative method for fabricating epitaxial Pd,Fe alloy thin films to form high quality magnetic heterostructures on perovskites enabling control over their composition and structural ordering. Overall, the results of this research have the potential to impact the performance of high density recording media in information technology.

\n\nSPEAKER:

Renee Harton, University of Michigan

MRL 1003

false

Special Condensed Matter Seminar: "Fabrication and Control of Pd,Fe Heterostructures."

Speaker Renee Harton, University of Michigan
Date: 2/16/2018
Time: 2 p.m.
Location:

MRL 1003

Sponsor:

Physics - Condensed Matter

Event Type: Seminar/Symposium
 

The goal of this research was to use multiferroic (ferroelectric/ferromagnetic) thin-film interfaces to control the magnetization of materials of interest for perpendicular recording. Using magnetostrictive coupling present in thin films of Pd/Fe compounds deposited onto ferroelectric Barium-Titanate (BTO) substrates, we were able to tune the out-ofplane magnetization of the Pd/Fe layer using substrate-induced epitaxial strain. This result is important because we have been able to demonstrate the elastic control of the perpendicular magnetic anisotropy of Palladium-Iron (Pd,Fe) films deposited onto BTO (100) substrate.

In order to enhance the substrate-film coupling present in the heterostructures, we sought to fabricate an ordered Pd3Fe film onto a cubic perovskite. We were able to achieve this objective by promoting the interdiffusion of an Fe/Pd multilayer heterostructures deposited onto SrTiO3 (100) substrates. The heterostructures were fabricated in Ultra-High Vacuum by depositing alternating Fe and Pd layers onto the SrTiO3 substrates. Once deposited, we were able to facilitate the formation of an Pd3Fe layer by annealing the structures above the formation temperature of Pd3Fe. Using both X-Ray diffraction and Reflection High-Energy Electron Diffraction, we were able to confirm that the films were both epitaxial and majority Pd3Fe. This research is significant because it provides an innovative method for fabricating epitaxial Pd,Fe alloy thin films to form high quality magnetic heterostructures on perovskites enabling control over their composition and structural ordering. Overall, the results of this research have the potential to impact the performance of high density recording media in information technology.

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