基于具有垂直磁各向异性的自旋矩二极管的射频信号探测器与能量收集器
RF signal detector and energy harvester based on a spin-torque diode with perpendicular magnetic anisotropy
AI总结：
本文理论证明具有一阶和二阶垂直磁各向异性且无偏置磁场的自旋矩二极管可在低于约250 MHz的射频信号下激发面外进动，并实现约5%转换效率的宽带射频能量收集。
摘要：
我们从理论上证明，在一种自旋电子二极管（SD）中，其自由磁层具有一阶和二阶垂直磁各向异性且无外部偏置磁场，当射频信号足够大（超过某一阈值）且频率小于约250 MHz时，可以激发磁化进动的面外状态。我们还表明，这种器件可以作为宽带能量收集器工作，能够将入射射频功率转换为直流功率，转换效率约为5%。所建立的无偏置SD工作解析理论可用于优化基于SD的高效射频探测器和能量收集器。
英文摘要：
We demonstrate theoretically that in a spintronic diode (SD), having a free magnetic layer with perpendicular magnetic anisotropy of the first and second order and no external bias magnetic field, the out-of-plane regime of magnetization precession can be excited by sufficiently large (exceeding a certain threshold) RF signals with the frequencies <~250 MHz. We also show that such a device can operate as a broadband energy harvester capable of converting incident RF power into a DC power with the conversion efficiency of ~5%. The developed analytical theory of the bias-free SD operation can be used for the optimization of high-efficiency RF detectors and energy harvesters based on SDs.
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