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Magnetic anisotropy manipulation and interfacial coupling in Sm3Fe5O12 films and CoFe/Sm3Fe5O12 heterostructures
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The magnetic anisotropy manipulation in the Sm3Fe5O12 (SmIG) films and its effect on the interfacial spin coupling in the CoFe/SmIG heterostructures were studied carefully. By switching the orientation of the Gd3Ga5O12 substrates from (111) to (001), the magnetic anisotropy of obtained SmIG films shifts from in-plane to out-of-plane. Similar results can also be obtained in the films on Gd3Sc2Ga3O12 substrates, which identifies the universality of such orientation-induced magnetic anisotropy switching. Additionally, the interfacial spin coupling and magnetic anisotropy switching effect on the spin wave in CoFe/SmIG magnetic heterojunctions have also been explored by utilizing the time-resolved magneto-optical Kerr effect technique. It is intriguing to find that both the frequency and effective damping factor of spin precession in CoFe/SmIG heterojunctions can be manipulated by the magnetic anisotropy switching of SmIG films. These findings not only provide a route for the perpendicular magnetic anisotropy acquisition but also give a further path for spin manipulation in magnetic films and heterojunctions. 相似文献
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随着全球IP和数据业务的爆炸性发展,带宽的迅速扩展使得大城市对光纤的需求不断增加,标准单模光纤在高速城域网应用中的一大问题是高色散,而色散绝对低的光纤可以无须补偿,从而降低网络的复杂性,降低中距离应用中每比特的成本。 非零色散光纤G.655 Freelight在长距离应用中的成功经验,使得市场开始寻求能将这些优势应用到中距离网络上的可能方案。今天的非零色散光纤技术使它成为可能。 比瑞利的WideLight光纤不但能支持2.5Gb/s和10Gb/s网络传输,而且在C波段和L波段所具有的低色散易于将来… 相似文献
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High-Power Continuous-Wave Diode-End-Pumped Intracavity Frequency Doubled Nd:YVO4 Laser at 671 nm with a Compact Three-Element Cavity 总被引:2,自引:0,他引:2
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We report a high-power high-efficient continuous-wave (cw) diode-end-pumped Nd:YVO4 1342-nm laser with a short plane-parallel cavity and an efficient cw intracavity frequency-doubled red laser at 671 nm with a compact three-element cavity. At incident pump power of 20.6 W, a maximum output power of 7 W at 1342 nm is obtained with a slope effciency of 37.3%. By inserting a type-Ⅰ critical phase-matched LBO crystal as intracavity frequencydoubler, a cw red output as much as 2.85-W is achieved with an incident pump power of 16.9 W, inducing an optical-to-optical conversion efficiency of 16.9%. To the best of our knowledge, this is the highest output of diodepumped solid-state Nd:YVO4 red laser. During half an hour, the red output is very stable, and the instability of output power is less than 1%. 相似文献
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随着高比特率(STM-64,不久将达到STM-256)、较窄间隔的波分复用系统的出现,新型G.655光纤能够比传统G.652单模光纤提供更好的性能:传输速度高(色散补偿更容易);在信号再生前的传输距离更长(色散低);系统可升级性好,系统总成本下降等。 相似文献
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本文提出一种频域压缩多帧近视解卷积算法.首先,根据波前传感器获取的大气湍流相位估计短曝光图像的初始点扩展函数,并逐步将点扩展函数调整到准确形式.通过共轭梯度(CG)算法交替解卷积频域代价函数估计目标图像和点扩展函数,为了有效压缩信息量,将图像频谱比增加到代价函数中,同时施加基本约束保证迭代快速收敛于全局最小解,采用结构自适应滤波器(SAAF)达到消除噪声的同时保护重建图像细节.实验结果表明算法能够得到高质量的重建图像,性能优于所对比多帧Tikhonov正则化解卷积和多帧Richardson-Lucy的盲解卷积算法. 相似文献
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2/3G网络中的PS系统间切换很大程度上影响着整网KPI和用户感知度。文章首先分析了PS系统间切换失败的原因,主要为“noreply”和“physical channel failure”,然后主要阐述了这两种失败原因的定位。 相似文献