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首页> 外文期刊>Journal of the Physical Society of Japan >Chiral Magnetism in an Itinerant Helical Magnet, MnSi - An Extended Si-29 NMR Study -
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Chiral Magnetism in an Itinerant Helical Magnet, MnSi - An Extended Si-29 NMR Study -

机译：流动螺旋磁铁MnSi中的手性磁性-扩展的Si-29 NMR研究-

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摘要

The microscopic magnetism in the helical, conical and ferromagnetically polarized phases in an itinerant helical magnet, MnSi, has been studied by an extended Si-29 NMR at zero field and under external magnetic fields. The temperature dependence of the staggered moment, M-Q(T), determined by the Si-29 NMR frequency, nu(T), and the nuclear relaxation rate, 1/T-1(T), at zero field is in general accord with the SCR theory for weak itinerant ferromagnetic metals and its extension to helical magnets. The external field dependence of resonance frequency, nu(H), follows a vector sum of the contributions from the atomic hyperfine and macroscopic fields with a field induced moment characteristic to itinerant magnets. A discontinuous jump of the resonance frequency at the critical field, H-c, between the conical and the polarized phases has also been found, which suggests a first order like change of the electronic states at H-c.
机译：通过扩展的Si-29 NMR在零场和外部磁场下研究了流动型螺旋磁体MnSi的螺旋，锥形和铁磁极化相中的微观磁性。由Si-29 NMR频率nu（T）和零弛豫时的核弛豫率1 / T-1（T）决定的交错矩MQ（T）与温度的关系通常与弱迭代铁磁金属的SCR理论及其对螺旋磁铁的扩展。谐振频率nu（H）的外场依赖性取决于遵循矢量的总和，这些矢量来自原子超精细场和宏观场的贡献，其中场感应矩特性对迭代磁体具有影响。还发现了在圆锥形和极化相之间的临界场H-c处共振频率的不连续跃变，这表明像H-c处的电子态变化一阶。

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