脉冲磁场对多畴磁体中单脉冲和双脉冲核自旋回波的影响
Influence of pulsed magnetic field on single- and two-pulse nuclear spin echoes in multidomain magnets
摘要：
通过外加脉冲磁场对不同磁性材料的影响，（半金属、锰氧化物、铁酸锂、钴）建立了当单脉冲回波形成的失真机制有效时磁脉冲对磁体中的单脉冲回波和双脉冲回波的影响的时间图的类比，以及在单脉冲回波形成的多脉冲机制有效的锂铁氧体的情况下不存在这种类似性。它还示出的定时和频率图的磁脉冲影响的两个脉冲回波信号，对应于对称和不对称的磁脉冲应用在所研究的磁体，定义由其畴壁参数，并可以为他们的定性和定量表征。
英文摘要：
By the method of additional pulsed magnetic field influence in different magnetic materials (half metals, manganites, lithium ferrite, cobalt) it is established the analogy of time diagrams of magnetic pulse influence on single- and two pulse echoes in magnets when the distortion mechanism of single-pulse echo formation is effective, and the absence of such analogy in the case of lithium ferrite where the multipulse mechanism of single-pulse echo formation is effective. It is shown also that the timing and frequency diagrams of magnetic pulse influence on the two-pulse echo signals, corresponding to the symmetric and asymmetric magnetic pulse applications in the studied magnets, are defined by their domain walls parameters and could serve for their qualitative and quantitative characterization.
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