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41.
Room-Temperature Ferromagnetic ZnMnO Thin Films Synthesized by Plasma Enhanced Chemical Vapour Deposition Method
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Room-temperature ferromagnetic Mn-doped ZnO films are grown on Si (001) substrates by plasma enhanced chemical vapour deposition (PECVD). X-ray diffraction measurements reveal that the Znl-xMn.O films have the single-phase wurtzite structure. X-ray photoelectron spectroscopy indicates the existence of Mn^2+ ions in Mndoped ZnO films. Furthermore, the decreasing additional Raman peak with increasing Mn-doping is considered to relate to the substitution of Mn ions for the Zn ions in ZnO lattice. Superconducting quantum interference device (SQUID) measurements demonstrate that Mn-doped ZnO films have ferromagnetic behaviour at room temperature. 相似文献
42.
胡鹏博刘兴超阮建斌施升志 《光学与光电技术》2023,(6):1-6
FPGA在光电系统中应用广泛,复杂的光电系统中可能集成了多个FPGA信号处理系统,整体状态下各子系统FPGA一般不具备在线JTAG更新程序的条件。提出一种基于Aurora协议光纤的FPGA远程更新方法,对FPGA烧录文件进行数据分包,光纤传输中增加握手和重发机制,数据包通过光纤接口发送给FPGA,FPGA对每一包数据校验无误后缓存至DDR中。当DDR接收完整包数据后,SOC系统通过Microblaze软核将DDR中的数据写入FLASH对应地址中,实现了FPGA程序的远程更新。经实验测试,光纤模块带宽可稳定工作在10 Gbps,8.52 MB的FPGA烧录文件的远程更新时间为117 s。该方法解决了长距离、复杂系统的FPGA远程更新问题,有效提高了远程更新效率,降低了数据传输误码率。 相似文献