Fragmentation of magnetism in artificial kagome dipolar spin ice
Fragmentation of magnetism in artificial kagome dipolar spin ice
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DOI：
10.1038/ncomms11446
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发表时间：
2016-05-01
影响因子：
16.6
通讯作者：
Rougemaille, Nicolas
中科院分区：
文献类型：
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作者：
Canals, Benjamin;Chioar, Ioan-Augustin;Rougemaille, Nicolas
磁性材料中的几何挫折通常会产生奇异的低温物质状态，例如在自旋冰中观察到的状态。在这里，我们报告的热活跃的人工磁冰，揭示了自旋碎裂过程的指纹的磁状态的成像。这种碎裂对应于磁自由度分裂成两个通道，并在真实的和倒易空间中得到证实。此外，这两个通道的内部组织内的混合自旋-电荷模型，直接出现从父自旋模型的戈薇偶极自旋冰的框架内解释。我们的实验和理论结果提供了对受抑磁体物理学的见解，并通过使用量身定制的磁性加深了我们对紧急场的理解。
Geometrical frustration in magnetic materials often gives rise to exotic, low-temperature states of matter, such as the ones observed in spin ices. Here we report the imaging of the magnetic states of a thermally active artificial magnetic ice that reveal the fingerprints of a spin fragmentation process. This fragmentation corresponds to a splitting of the magnetic degree of freedom into two channels and is evidenced in both real and reciprocal space. Furthermore, the internal organization of both channels is interpreted within the framework of a hybrid spin-charge model that directly emerges from the parent spin model of the kagome dipolar spin ice. Our experimental and theoretical results provide insights into the physics of frustrated magnets and deepen our understanding of emergent fields through the use of tailor-made magnetism.