Temperature-dependent magnetism in artificial honeycomb lattice of connected elements
Temperature-dependent magnetism in artificial honeycomb lattice of connected elements
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DOI：
10.1103/physrevb.97.014401
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发表时间：
2018-01-03
影响因子：
3.7
通讯作者：
Singh, D. K.
中科院分区：
文献类型：
--
作者：
Summers, B.;Debeer-Schmitt, L.;Singh, D. K.
人工磁性蜂窝晶格有望表现出在天然材料中难以实现的广泛且可调的新磁性现象，例如长程自旋冰，熵驱动的磁电荷有序态以及由于自旋手性而导致的自旋有序。最终，自旋关联有望发展成一个独特的自旋固体状态密度基态，表现为相反的手征涡旋态对的分布。在这里，我们报告创建一个人工坡莫合金蜂窝晶格的超小连接键，具有类似或等于12纳米的典型尺寸。详细的磁和中子散射测量新制作的蜂窝晶格证明了作为温度的函数的磁相关的演变。在足够低的温度下，中子散射测量和微磁模拟表明，在这个系统中的涡旋位形的环态的发展。
Artificial magnetic honeycomb lattices are expected to exhibit a broad and tunable range of novel magnetic phenomena that would be difficult to achieve in natural materials, such as long-range spin ice, entropy-driven magnetic charge-ordered states, and spin order due to the spin chirality. Eventually, the spin correlation is expected to develop into a unique spin-solid-state-density ground state, manifested by the distribution of the pairs of vortex states of opposite chirality. Here we report the creation of an artificial permalloy honeycomb lattice of ultrasmall connecting bonds, with a typical size of similar or equal to 12 nm. Detailed magnetic and neutron-scattering measurements on the newly fabricated honeycomb lattice demonstrate the evolution of magnetic correlation as a function of temperature. At low enough temperature, neutron-scattering measurements and micromagnetic simulation suggest the development of a loop state of vortex configuration in this system.