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Memristive behavior of field-driven domain-wall motion in a width-modulated structure with multiple Hall crosses

Title
Memristive behavior of field-driven domain-wall motion in a width-modulated structure with multiple Hall crosses
Authors
Hwang, Hee-KyeongKwon, JaesukLee, Ki-SeungHong, Jung-IlYou, Chun-Yeol
DGIST Authors
Hwang, Hee-Kyeong; Kwon, Jaesuk; Lee, Ki-Seung; Hong, Jung-IlYou, Chun-Yeol
Issue Date
2018-11
Citation
Journal of Applied Physics, 124(19)
Type
Article
Article Type
Article
Keywords
SPIN-ORBIT TORQUEMEMORYDEVICE
ISSN
0021-8979
Abstract
The remarkable property of a memristor is that it provides multiple resistance states by remembering the current or voltage history associated with the magnetic flux and charge in the device. We investigate the domain wall (DW) motion in a multiple Hall crosses (MHCs) structure to realize the memristive DW device. We fabricated perpendicular magnetic anisotropy (PMA) micro-wires for a [Co/Pt]4 multilayer stack, and they contain MHCs with various widths. When an external field is applied, a DW alternately passes through each Hall cross, thereby creating a hysteresis loop with various magnitudes of Hall resistance states depending on the DW position. Because the measured Hall signal relies on the DW position, which is a function of the history of the field, the basic requirements of a memristor are satisfied. In addition to the anomalous Hall signal, the movement of the DW in the PMA system by field pulses has been recorded using a Kerr microscope to confirm the DW position. The results reveal that the DW motion in the width-modulated MHCs system can be used as a promising test bed and/or application of the memristive DW-motion device. © 2018 Author(s).
URI
http://hdl.handle.net/20.500.11750/9468
DOI
10.1063/1.5042100
Publisher
American Institute of Physics
Related Researcher
  • Author You, Chun-Yeol Spin Phenomena for Information Nano-devices(SPIN) Lab
  • Research Interests Spintronics; Condensed Matter Physics; Magnetic Materials & Thin Films; Micromagnetic Simulations; Spin Nano-Devices
Files:
There are no files associated with this item.
Collection:
Department of Emerging Materials ScienceETC1. Journal Articles
Department of Emerging Materials ScienceSpin Nanotech Laboratory1. Journal Articles
Department of Emerging Materials ScienceSpin Phenomena for Information Nano-devices(SPIN) Lab1. Journal Articles


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