Full voltage control of giant magnetoresistance
The aim of voltage control of magnetism is to reduce the power consumption of spintronic devices. For a spin valve, the relative magnetic orientation for the two ferromagnetic layers is a key factor determining the giant magnetoresistance (GMR) ratio. However, achieving full voltage manipulation of the magnetization directions between parallel and antiparallel states is a significant challenge. Here, we demonstrate that by utilizing two exchange-biased Co/IrMn bilayers with opposite pinning directions and with ferromagnetic interlayer coupling between the two Co layers, the magnetization alignment of the two Co layers of a spin valve can be switched between antiparallel and nearly parallel states by voltage-induced strain, leading to a full voltage control of GMR in a repeatable manner. The magnetization rotating processes for the two Co layers under different voltages can be clearly demonstrated by simulations based on the Landau–Lifshitz–Gilbert equation. This work provides valuable references for the development of full voltage-controlled spintronic devices with low energy consumption.
Authors
- Jincheng Peng (ORCID: https://orcid.org/0009-0004-5166-3370)
- Wei-Hao Wang (ORCID: https://orcid.org/0000-0003-2588-1265)
- Wei Niu (ORCID: https://orcid.org/0000-0002-4331-0928)
- Yiyang Zhang (ORCID: https://orcid.org/0000-0003-0600-3221)
- Jiarui Chen (ORCID: https://orcid.org/0000-0002-9571-5281)
- Yanghui Li (ORCID: https://orcid.org/0000-0001-7900-5661)
- Tianyu Liu (ORCID: https://orcid.org/0000-0003-3100-7216)
- Fei Huang (ORCID: https://orcid.org/0000-0001-8090-4533)
- Jun Du (ORCID: https://orcid.org/0000-0002-9967-945X)
- Feng Li (ORCID: https://orcid.org/0000-0003-2638-2185)
- Lujun Wei (ORCID: https://orcid.org/0009-0003-8950-6277)
- Yu Lu (ORCID: https://orcid.org/0009-0006-5520-2023)
- Jiaju Yang
- Yong Pu
Institutions
- Nanjing University of Posts and Telecommunications (CN)
- Spintronics Research Network of Japan (JP)
- Collaborative Innovation Center of Advanced Microstructures (CN)
- Nanjing University (CN)
Publication Details
- Journal
- Applied Physics Letters
- Published
- 2024-12-23
- DOI
- https://doi.org/10.1063/5.0246117
- Citations
- 2
- Primary Topic
- Magnetic properties of thin films
- Type
- article
- Field-Weighted Citation Impact
- 0.68
Funders
- National Natural Science Foundation of China
- National Key Research and Development Program of China