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Current superconducting memory devices lack the basic quality of high memory density for practical memories, mainly due to the size limitations of superconducting quantum interference devices. Here, we propose a superconductor-ferromagnet bilayer device with strain-pulse-assisted multi-bit ladder-type memory, by using strain-engineered ferromagnet domain structure to control carrier concentration in the superconductor, which is simulated by coupled Landau-Lifshitz-Gilbert and Ginzburg-Landau equations. Current- and strain-pulses are observed to deterministically control the resistivity of superconductor for one and two-bit device arrangements. The average carrier concentration of superconductor is observed to have multiple metastable states that can be controllably switched using current-pulse and strain-pulse to determine multiple resistivity states. These findings confirm the eligibility of superconductor-ferromagnet bilayers to be used as ladder-type multibit memories and open a new way for further theoretical and experimental investigations of the cryogenic memories. 相似文献
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密闭空间内不同炸药爆源的能量输出结构及与目标作用研究 总被引:2,自引:0,他引:2
对钝化黑索今(RDX)、含铝炸药(RDX/Al)、一次引爆型燃料空气炸药(SEFAE)在爆炸容器和爆炸水池中爆炸波的能量输出结构进行了实验研究。用TVD格式数值模拟了带平板封头爆炸容器的内部爆炸载荷的分布规律。并对在不同爆炸载荷作用下,容器典型位置的应变进行了测量。结果表明:(1)密闭空间内,RDX/Al(90/10)和SEFAE体系具有后燃效应;(2)在本实验条件下,平板封头与罐体结合处的载荷最大;(3)SEFAE产生的爆炸载荷对容器的作用最小,钝化RDX和RDX/Al(90/10)两者相当。3种炸药产生应变的频谱相似,强度略有差别;(4)在本实验的条件下,爆炸载荷的结构不是应变增长的主要原因。 相似文献
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