Publications by authors named "Gengfei Li"

The advantages of high integration density, energy efficiency, and enhanced stability make the realization of perpendicular magnetic anisotropy (PMA) in single-layer films a crucial step toward the development of advanced spintronic devices. A theoretical study predicted that the magnetic easy axis of FeRh film would reorient from out-of-plane (OP) to in-plane (IP) directions during the antiferromagnetic-ferromagnetic (AF-FM) phase transition. However, few studies have observed an OP magnetic anisotropy in FeRh films.

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The writing performance of the easy-cone magnetic tunnel junction (MTJ) and perpendicularly magnetized MTJ (pMTJ) under various temperatures was investigated based on the macrospin model. When the temperature is changed from 273 K to 373 K, the switching current density of the pMTJ changes by 56%, whereas this value is only 8% in the easy-cone MTJ. Similarly, the temperature-induced variation of the switching delay is more significant in the pMTJ.

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Article Synopsis
  • Antiferromagnetic (AFM) materials are seen as the future of magnetic memory technology due to their high storage density and rapid writing speeds, despite challenges in energy-efficient manipulation.
  • The study introduces an innovative method for writing antiferromagnetic orders using a very low current density (around 10 A/cm) achieved through a phase transition in FeRh, where a transient ferromagnetic state is induced by Joule heating.
  • Experimental results, including temperature and magnetic bias field measurements, confirm successful switching of the AFM order, suggesting that this approach could lead to practical applications in energy-efficient AFM memory devices.
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The rapid development of wearable electronics has led to an enormous demand for power sources that are wearable, small-scale, flexible and compatible. In this work, poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) as the liquid electrode and silicone rubber as the triboelectric/encapsulation layer were introduced to design a stretchable PEDOT:PSS liquid electrode-based triboelectric nanogenerator (PL-TENG). The elastic silicone rubber and PEDOT:PSS liquid electrode with a special macromolecular structure endowed PL-TENG with extraordinary flexibility and conductivity simultaneously.

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