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Spin polarized transport in a magnetic tunnel junction with an oxide barrier

Buil Contreras, Miranda Jacqueline (2023) Spin polarized transport in a magnetic tunnel junction with an oxide barrier. Bachelor's Thesis, Physics.


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This research focuses on the fabrication of MTJ (Magnetic Tunnel Junction) devices using different materials, with the aim of measuring their tunneling magnetoresistance ratio. One of the materials used is La2/3Sr1/3MnO3 , a ferromagnetic cubic perovskite manganate known for its 100% spin polarization, which can greatly enhance the efficiency of spintronic devices by contributing to highly spin polarized current. Three FM/I/FM stacks are fabricated, with La2/3Sr1/3MnO3 serving as the bottom layer and SrTiO3 as the insulating layer. The structural, magnetic, and electrical properties of these stacks are extensively investigated using techniques such as atomic force microscopy, reflective highenergy electron diffraction, x-ray diffraction, and magnetic properties measurement systems. Among the fabricated samples, the LSMO/STO/Co stack exhibits the highest quality of growth, although all samples meet the necessary quality standards. Suggestions about how to further complete the study to obtain a more comprehensive understanding of the investigated systems are presented.

Item Type: Thesis (Bachelor's Thesis)
Supervisor name: Banerjee, T. and Jaman, A.
Degree programme: Physics
Thesis type: Bachelor's Thesis
Language: English
Date Deposited: 10 Jul 2023 08:18
Last Modified: 10 Jul 2023 08:18

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