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Chin. Phys. B, 2020, Vol. 29(7): 077507    DOI: 10.1088/1674-1056/ab8da9

Ionic liquid gating control of planar Hall effect in Ni80Fe20/HfO2 heterostructures

Yang-Ping Wang(汪样平)1,2, Fu-Fu Liu(刘福福)1,2, Cai Zhou(周偲)3, Chang-Jun Jiang(蒋长军)1,2
1 Key Laboratory for Magnetism and Magnetic Materials, Ministry of Education, Lanzhou University, Lanzhou 730000, China;
2 Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University, Lanzhou 730000, China;
3 Hubei Province Engineering Research Center for Intelligent Micro-nano Medical Equipment and Key Technologies, School of Electrical and Electronics Engineering, Wuhan 430202, China
Abstract  We report a tunable transverse magnetoresistance of the planar Hall effect (PHE), up to 48% in the Ni80Fe20/HfO2 heterostructures. This control is achieved by applying a gate voltage with an ionic liquid technique at ultra-low voltage, which exhibits a gate-dependent PHE. Moreover, in the range of 0-V to 1-V gate voltage, transverse magnetoresistance of PHE can be continuously regulated. Ferromagnetic resonance (FMR) also demonstrates the shift of the resonance field at low gate voltage. This provides a new method for the design of the electric field continuous control spintronics device with ultra-low energy consumption.
Keywords:  ionic liquid gating      planar Hall effect      electric field regulation  
Received:  03 March 2020      Revised:  23 April 2020      Published:  05 July 2020
PACS:  75.85.+t (Magnetoelectric effects, multiferroics)  
  75.90.+w (Other topics in magnetic properties and materials)  
Fund: Project 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, China (Grant No. IRT-16R35), and the Fundamental Research Funds for the Central Universities, China.
Corresponding Authors:  Chang-Jun Jiang     E-mail:

Cite this article: 

Yang-Ping Wang(汪样平), Fu-Fu Liu(刘福福), Cai Zhou(周偲), Chang-Jun Jiang(蒋长军) Ionic liquid gating control of planar Hall effect in Ni80Fe20/HfO2 heterostructures 2020 Chin. Phys. B 29 077507

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