Crystallization of magnetic skyrmions in MnSi investigated by neutron spin echo spectroscopy
Crystallization of magnetic skyrmions in MnSi investigated by neutron spin echo spectroscopy
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中子自旋回波谱研究 MnSi 中磁性斯格明子的结晶
DOI：
10.1103/physrevresearch.2.043393
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发表时间：
2020
影响因子：
4.2
通讯作者：
Arima Taka-hisa
中科院分区：
文献类型：
--
作者：
Nakajima Taro;Oda Tatsuro;Hino Masahiro;Endo Hitoshi;Ohishi Kazuki;Kakurai Kazuhisa;Kikkawa Akiko;Taguchi Yasujiro;Tokura Yoshinori;Arima Taka-hisa
我们对MnSi进行了中子共振自旋回波测量，以研究磁性skyrmions在磁场中冷却时如何结晶成晶格。我们发现，Skyrmion聚集成小Skyrmion晶格（SkL）域的取向无序后，从顺磁相过渡到SkL相。这些畴在时间上几乎是静态的，并且与手征自旋涨落共存，其特征弛豫时间接近转变温度。随着温度的进一步降低，SkL结构域合并成长程有序的SkL。这些观测提供了磁skyrmion结晶的微观图像。
We performed neutron resonance spin echo measurements on MnSi to investigate how the magnetic skyrmions crystalize into a lattice on cooling in a magnetic field. We found that the skyrmions aggregate into small skyrmion-lattice (SkL) domains with orientational disorder upon the transition from the paramagnetic phase to the SkL phase. These domains are nearly static in time, and coexist with chiral spin fluctuations with a characteristic relaxation time ofnear the transition temperature. As the temperature is further decreased, the SkL domains merge into the long-range-ordered SkL. These observations provide a microscopic picture of the crystallization of the magnetic skyrmions.