| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Low Voltage Reversible Manipulation of Ferromagnetic Resonance Response in CoFeB/HfO$_{2}$ Heterostructures |
| Yangping Wang1,2, Hongyan Zhou3, Yibing Zhao1,2, Fufu Liu1,2, and Changjun Jiang1,2* |
1Key Laboratory for Magnetism and Magnetic Materials (Ministry of Education), Lanzhou University, Lanzhou 730000, China
2Key Laboratory of Special Function Materials and Structure Design (Ministry of Education), Lanzhou University, Lanzhou 730000, China
3Institute of Electronic Materials, Lanzhou University, Lanzhou 730000, China
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| Cite this article: |
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Yangping Wang, Hongyan Zhou, Yibing Zhao et al 2020 Chin. Phys. Lett. 37 127501 |
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Abstract We report that the ferromagnetic resonance (FMR) response of the CoFeB/HfO$_{2}$ heterostructures is stabilized and reversibly manipulated by ionic gel. Ionic gel with excellent flexibility is used as a medium to form an electric field. When a 4 V gate voltage is applied, the resonance field $H_{\rm r}$ and peak-to-peak linewidth $\Delta H_{\rm pp}$ at different angles are regulated. When $\theta = 20^{\circ}$, the $H_{\rm r}$ is regulated up to 82 Oe. When $\theta = 70^{\circ}$, $\Delta H_{\rm pp}$ is tuned up to 75 Oe. When the gate voltage is repeatedly applied, the FMR spectra can be freely switched between the initial state and the gated state. Our study provides an effective method to manipulate the damping of the magnetic film stably and reversibly.
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Received: 23 August 2020
Published: 08 December 2020
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| PACS: |
75.85.+t
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(Magnetoelectric effects, multiferroics)
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75.78.-n
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(Magnetization dynamics)
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75.78.Jp
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(Ultrafast magnetization dynamics and switching)
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| Fund: Supported by the National Natural Science Foundation of China (Grant Nos. 51671099 and 11974149), the Open Foundation Project of Jiangsu Key Laboratory of Thin Films (Grant No. KJS1745), the Program for Changjiang Scholars and Innovative Research Team in University (Grant No. IRT-16R35), and the Fundamental Research Funds for the Central Universities. |
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