Lithium ferrite for spin-based spintronics
Abstract/Contents
- Abstract
- The realization of more energy efficient nanomagnetic information devices in the field of spintronics relies on the existence of magnetic insulators capable of supporting pure spin currents in the absence of a dissipative charge current. Currently, there is a limited number of thin-film magnetic insulators with low magnetic damping. Li0.5Fe2.5O4 (LFO) is well known to possess the lowest damping among the bulk spinel structure oxides, but, thus far, LFO thin films have not lived up to these expectations. In this work I establish LFO as a promising low damping material in the field of spintronics. First, I demonstrate the first successful synthesis of LFO thin films with bulk-like magnetic properties. With chemical substitution, perpendicular magnetic anisotropy (PMA) was engineered into these LFO films - an additional desirable characteristic for spintronics devices. As a proof-of-concept application I fabricate an LFO-based device and demonstrate spin-orbit-torque switching in LFO films with current densities up to an order of magnitude lower than those observed in similar systems. Furthermore, I demonstrate that LFO can support the transport of pure spin currents over micron length scales, which is moderately large compared to other spinel ferrite insulators. These properties make LFO ideal for efficient spin current applications and highlight LFO's potential to be an all-star material in the field of spintronics.
Description
| Type of resource | text |
|---|---|
| Form | electronic resource; remote; computer; online resource |
| Extent | 1 online resource. |
| Place | California |
| Place | [Stanford, California] |
| Publisher | [Stanford University] |
| Copyright date | 2023; ©2023 |
| Publication date | 2023; 2023 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Zheng, XinYu |
|---|---|
| Degree supervisor | Suzuki, Yuri |
| Thesis advisor | Suzuki, Yuri |
| Thesis advisor | Feldman, Ben |
| Thesis advisor | Hwang, Harold |
| Degree committee member | Feldman, Ben |
| Degree committee member | Hwang, Harold |
| Associated with | Stanford University, School of Humanities and Sciences |
| Associated with | Stanford University, Department of Applied Physics |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | XinYu Zheng. |
|---|---|
| Note | Submitted to the Department of Applied Physics. |
| Thesis | Thesis Ph.D. Stanford University 2023. |
| Location | https://purl.stanford.edu/rm599qt4195 |
Access conditions
- Copyright
- © 2023 by XinYu Zheng
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
Also listed in
Loading usage metrics...