磁体中的双脉冲受激回波
Two-pulse stimulated echo in magnets
摘要：
本文介绍了两种铁磁体中双脉冲受激回波的实验研究结果。铁磁体Co和半金属Co MnSi 2也属于第一类，其中还观察到由激励脉冲前沿的畸变机制形成的单脉冲回波。锂铁氧体和金属间化合物MnSb的特点是没有单脉冲回波-属于第二种类型。对于第一类材料中的双脉冲受激回波信号，观察到短时间和长时间的弛豫。短时间大约是小于自旋-自旋弛豫时间的值的数量级。其长时间接近于畸变机制形成的单脉冲回波的横向弛豫时间。的机制，提供可能的解释的特殊性的过程中的核磁弛豫进行了讨论。
英文摘要：
The results of experimental study of two-pulse stimulated echo in ferromagnets of two types are presented. Ferromagnet Co and half-metal Co MnSi 2, in which a single-pulse echo formed by the distortion mechanism of the fronts of exciting pulse is also observed, are classified among the first type. Lithium ferrite and intermetal compound MnSb characterized by the absence of single-pulse echo in them - belong to the second type. For signals of two-pulse stimulated echo in the materials of the first type a short time and a long time of relaxations are observed. The short time is about the order of value shorter less than the spin-spin relaxation time. The long time is close to the transverse relaxation time of single-pulse echo formed by the distortion mechanism. The mechanisms that provide the possible interpretations of the peculiarities of the processes of nuclear magnetic relaxation are discussed.
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