共查询到17条相似文献,搜索用时 62 毫秒
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在光泵磁共振实验中,选择合适的射频频率、扫场幅度和外加水平磁场对实验的顺利进行和保证实验测量结果的精度有着重要作用。虽然已有很多文章探讨过相关问题,但并未明确提出关于上述实验参数选取的原则以及相应的参数取值范围。本文提出在光泵磁共振实验中,相关实验参数的选取应该使得在测量过程中能够观测到所有对应于三角波峰和波谷位置的共振信号并明确地区分信号来源。本文通过理论分析给出了不同测量方法下相应的实验参数取值范围,并通过实验测量验证了这些参数取值范围的合理性。 相似文献
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光磁共振实验中扫场和水平场关系的探究 总被引:2,自引:0,他引:2
光泵磁共振实验中,在磁共振信号观察时,常常会有光抽运信号同时出现的现象,这严重影响了实验的有效观察和准确测量。本文阐述了取合适的扫场和水平场的大小的关系,从而避免实验过程中磁共振信号和光抽运信号的同时出现,以确保实验的精准。 相似文献
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光泵磁共振法测量地磁场水平分量BE11 总被引:2,自引:0,他引:2
采用与示波器同步的扫描场探测光磁共振,使光磁共振信号稳定;选择扫场的同一点(最好选在峰点或谷点)作参考点。有利于结合实际情况测地磁场水平分量BE11。 相似文献
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Rakesh Kar 《Journal of magnetism and magnetic materials》2010,322(6):671-674
If one applies an rf magnetic field parallel to a strong static field, temperature of a ferromagnetic substance rises due to ferromagnetic resonance. This phenomenon finds immediate application in the field of hyperthermic oncology. In this work, we have found expression for the increase in temperature when a ferromagnetic material is placed under a static and a varying magnetic field of high frequency through spin wave approach. The numerical value of this increment of local temperature has been estimated for yttrium iron garnet (YIG). We also have examined the possibility of enhancing the temperature of a ferromagnetic material only by applying a strong static field. 相似文献
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We investigate the relationship between the eye-penalty and the clock amplitude of the transmission signal. The simulation results for return-to-zero (RZ) signals show a good correspondence between the clock amplitude and the eye-penalty. For a non-return-to-zero (NRZ) signal, however, the correspondence between them is satisfied within the reasonable range of the transmission distance. Thus, we can monitor the eye-penalty by measuring the clock amplitude of the transmission signal. The proposed scheme may provide a cost-effective monitoring of the chromatic dispersion-induced signal distortion in optical transmission systems and networks. 相似文献
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Observation of intermolecular double-quantum coherence signal dips in nuclear magnetic resonance 下载免费PDF全文
The correlated spectroscopy revamped by asymmetric Z-gradient echo detection (CRAZED) sequence is modified to investigate intermolecular double-quantum coherence nuclear magnetic resonance signal dips in highly polarized spin systems. It is found that the occurrence of intermolecular double-quantum coherence signal dips is related to sample geometry, field inhomogeneity and dipolar correlation distance. If the field inhomogeneity is refocused, the signal dip occurs at a fixed position whenever the dipolar correlation distance approaches the sample dimension. However, the position is shifted when the field inhomogeneity exists. Experiments and simulations are performed to validate our theoretic analysis. These signal features may offer a unique way to investigate porous structures and may find applications in biomedicine and material science. 相似文献
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