基于交换作用的纳磁逻辑电路片上时钟结构研究

纳磁逻辑电路具有低功耗、非易失和可常温下制备等优点, 实现低功耗片上时钟是其集成化的必备条件. 本文提出了一种基于交换作用的纳磁逻辑电路片上时钟结构, 用载流铜导线产生的奥斯特场将铁磁体薄膜覆层进行磁化, 然后依靠铁磁体层与纳磁体界面存在的交换作用场使后者磁化方向发生翻转. 与轭式铁磁体时钟用外磁场控制纳磁体磁化方向相比, 该方案在功耗方面降低了5/6, 时钟边界杂散场强度降低了2/3, 达到降低功耗、减轻串扰的目的. 此外, 采用微磁仿真进一步验证了该时钟结构上的纳磁体逻辑阵列可以实现逻辑功能.关键词：纳磁逻辑片上时钟交换作用

On-chip clocking for exchange-interaction-based nanomagnetic logic circuits

Nanomagnetic logic has the advantages in low power, non-volatility, and room temperature operation, however, low power on-chip clocking is the requirement of its integration. An on-chip clocking structure for a nanomagnetic logic circuit using exchange interaction is proposed in this work. This scheme is to use the Oersted field generated by current-carrying copper wire to magnetize ferromagnetic film cladding and then to switch the magnetization orientation of nanomagnets by the exchange interaction between magnetic layers. Simulation results demonstrate that the proposed scheme can reduce the power dissipation by 5/6 and the marginal spray field by 2/3 compared with the ferromagnetic yoked clocking that uses the external field to switch the magnetization. Therefore, it can reduce the power consumption and the risk of crosstalk. In addition, micromagnetic simulation verifies that nanomagnetic array laid on the proposed clocking can work functionally.
Keywords：nanomagnetic logicon-chip clockingexchanging interaction