Emergent Dynamics of Artificial Spin-Ice Lattice Based on an Ultrathin Ferromagnet

被引：19
|
作者：
Ghosh, Abhijit [1 ,2 ]
Ma, Fusheng [3 ]
Lourembam, James [1 ,2 ]
Jin, Xiangjun [3 ]
Maddu, Ramu [1 ,2 ]
Yap, Qi Jia [1 ,2 ]
Ter Lim, Sze [1 ,2 ]
机构：
[1] ASTAR, Data Storage Inst, 2 Fusionopolis Way,08-01 Innovis, Singapore 138634, Singapore
[2] ASTAR, Inst Mat Res & Engn, 2 Fusionopolis Way,08-03 Innovis, Singapore 138634, Singapore
[3] Nanjing Normal Univ, Sch Phys & Technol, Ctr Quantum Transport & Thermal Energy Sci, Jangsu Key Lab Optoelect Technol, Nanjing 210023, Peoples R China
来源：
NANO LETTERS | 2020年 / 20卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Artificial spin-ice; magnetic frustration; high-frequency dynamics; demagnetization factors; ZERO-POINT ENTROPY;
D O I：
10.1021/acs.nanolett.9b03352
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We present high-frequency dynamics of magnetic nanostructure lattices, fabricated in the form of "artificial spin-ice", that possess magnetically frustrated states. Dynamics of such structures feature multiple resonance excitation that reveals rich and intriguing microwave characteristics, which are highly dependent on field-cycle history. Geometrical parameters such as dimensions and ferromagnetic layer thickness, which control the interplay of different demagnetizing factors, are found to play a pivotal role in governing the dynamics. Our findings are highlighted by the evolution of unique excitations pertaining to magnetic frustration, which are well supported by static magnetometry studies and micromagnetic simulations.
引用
收藏
页码：109 / 115
页数：7
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