Avalanches, defects and ordering in artificial spin ice when the dipole approximation fails

2021 ◽  
Author(s):  
Robert L. Stamps
Keyword(s):  
Dipole Approximation ◽  
Spin Ice ◽  
Artificial Spin Ice

scholarly journals Bilayer artificial spin ice: Magnetic force switching and basic thermodynamics

2021 ◽  
Vol 129 (5) ◽  
pp. 053901
Author(s):  
Fabio S. Nascimento ◽  
Afranio R. Pereira ◽  
Winder A. Moura-Melo
Keyword(s):  
Magnetic Force ◽  
Spin Ice ◽  
Artificial Spin Ice

scholarly journals Switchable X-Ray Orbital Angular Momentum from an Artificial Spin Ice

2021 ◽  
Vol 126 (11) ◽  
Author(s):  
Justin S. Woods ◽  
Xiaoqian M. Chen ◽  
Rajesh V. Chopdekar ◽  
Barry Farmer ◽  
Claudio Mazzoli ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Spin Ice ◽  
X Ray ◽  
Artificial Spin Ice

scholarly journals Field-Induced Magnetic Monopole Plasma in Artificial Spin Ice

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
M. Goryca ◽  
X. Zhang ◽  
J. Li ◽  
A. L. Balk ◽  
J. D. Watts ◽  
...  
Keyword(s):  
Magnetic Monopole ◽  
Spin Ice ◽  
Artificial Spin Ice

scholarly journals Angular-dependent dynamic response and magnetization reversal in Fibonacci-distorted kagome artificial spin ice

2021 ◽  
Vol 103 (18) ◽  
Author(s):  
Ali Frotanpour ◽  
Justin Woods ◽  
Barry Farmer ◽  
Amrit P. Kaphle ◽  
J. Todd Hastings ◽  
...  
Keyword(s):  
Dynamic Response ◽  
Magnetization Reversal ◽  
Spin Ice ◽  
Artificial Spin Ice

scholarly journals Emergent Spin Dynamics Enabled by Lattice Interactions in a Bicomponent Artificial Spin Ice

Nano Letters ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 1921-1927 ◽  
Author(s):  
Sergi Lendinez ◽  
Mojtaba T. Kaffash ◽  
M. Benjamin Jungfleisch
Keyword(s):  
Spin Dynamics ◽  
Spin Ice ◽  
Artificial Spin Ice

scholarly journals Magnetic Normal Mode Calculations in Big Systems: A Highly Scalable Dynamical Matrix Approach Applied to a Fibonacci-Distorted Artificial Spin Ice

2021 ◽  
Vol 7 (3) ◽  
pp. 34
Author(s):  
Loris Giovannini ◽  
Barry W. Farmer ◽  
Justin S. Woods ◽  
Ali Frotanpour ◽  
Lance E. De Long ◽  
...  
Keyword(s):  
Normal Modes ◽  
Low Frequency ◽  
Fibonacci Sequence ◽  
Exchange Interactions ◽  
Geometric Distortion ◽  
Dynamical Matrix ◽  
Spin Ice ◽  
Magnetization Dynamics ◽  
Distortion Parameter ◽  
Artificial Spin Ice

We present a new formulation of the dynamical matrix method for computing the magnetic normal modes of a large system, resulting in a highly scalable approach. The motion equation, which takes into account external field, dipolar and ferromagnetic exchange interactions, is rewritten in the form of a generalized eigenvalue problem without any additional approximation. For its numerical implementation several solvers have been explored, along with preconditioning methods. This reformulation was conceived to extend the study of magnetization dynamics to a broader class of finer-mesh systems, such as three-dimensional, irregular or defective structures, which in recent times raised the interest among researchers. To test its effectiveness, we applied the method to investigate the magnetization dynamics of a hexagonal artificial spin-ice as a function of a geometric distortion parameter following the Fibonacci sequence. We found several important features characterizing the low frequency spin modes as the geometric distortion is gradually increased.

scholarly journals Artificial ‘spin ice’ in a geometrically frustrated lattice of nanoscale ferromagnetic islands

Nature ◽  
2006 ◽  
Vol 439 (7074) ◽  
pp. 303-306 ◽  
Author(s):  
R. F. Wang ◽  
C. Nisoli ◽  
R. S. Freitas ◽  
J. Li ◽  
W. McConville ◽  
...  
Keyword(s):  
Spin Ice ◽  
Artificial Spin Ice ◽  
Geometrically Frustrated ◽  
Frustrated Lattice
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