Tunable negligible-loss energy transfer between dipolar-coupled magnetic disks by stimulated vortex gyration.
Tunable negligible-loss energy transfer between dipolar-coupled magnetic disks by stimulated vortex gyration.
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DOI：
10.1038/srep00059
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发表时间：
2011
影响因子：
4.6
通讯作者：
Kim, Sang-Koog
中科院分区：
文献类型：
--
作者：
Jung, Hyunsung;Lee, Ki-Suk;Jeong, Dae-Eun;Choi, Youn-Seok;Yu, Young-Sang;Han, Dong-Soo;Vogel, Andreas;Bocklage, Lars;Meier, Guido;Im, Mi-Young;Fischer, Peter;Kim, Sang-Koog
自然界中存在着各种各样的耦合谐振子。不同振荡器之间的耦合允许它们之间的相互能量转移和信息信号传播的可能性。低能量输入信号及其能量损失可忽略不计的传输是信息信号处理设备设计中的关键技术因素。在这里，利用耦合振荡器的概念，我们实验证明了一个强大的新机制，空间分离的偶极耦合磁盘之间的能量转移-受激涡旋回转。直接的实验证据，获得了一个国家的最先进的实验时间分辨软X射线显微镜探头。由偶极相互作用引起的两个简正模的频率分裂，导出了能量从一个圆盘到另一个圆盘的转移率。这种机制提供了可调的能量传输速率，低功率输入信号和可忽略的能量损失的情况下，可以忽略不计的固有阻尼的优点。耦合涡旋状态盘可以在信息信号处理的应用中实现。
A wide variety of coupled harmonic oscillators exist in nature. Coupling between different oscillators allows for the possibility of mutual energy transfer between them and the information-signal propagation. Low-energy input signals and their transport with negligible energy loss are the key technological factors in the design of information-signal processing devices. Here, utilizing the concept of coupled oscillators, we experimentally demonstrated a robust new mechanism for energy transfer between spatially separated dipolar-coupled magnetic disks - stimulated vortex gyration. Direct experimental evidence was obtained by a state-of-the-art experimental time-resolved soft X-ray microscopy probe. The rate of energy transfer from one disk to the other was deduced from the two normal modes' frequency splitting caused by dipolar interaction. This mechanism provides the advantages of tunable energy transfer rates, low-power input signals and negligible energy loss in the case of negligible intrinsic damping. Coupled vortex-state disks might be implemented in applications for information-signal processing.
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