Spin-ice behavior of three-dimensional inverse opal-like magnetic structures: Micromagnetic simulations

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:441

Article

Dubitskiy, I. S.¹  Syromyatnikov, A. V.^1,2  Grigoryeva, N. A.²  Mistonov, A. A.^1,2  Sapoletova, N. A.³  Grigoriev, S. V.^1,2 

[1] Kurchatov Inst, Natl Res Ctr, Petersburg Nucl Phys Inst, Gatchina 188300, Russia

[2] St Petersburg State Univ, 7-9 Univ Skaya Nab, St Petersburg 199034, Russia

[3] Lomonosov Moscow State Univ, Moscow 119991, Russia

关键词: Artificial spin ice;    Micromagnetics;    Inverse opal;   

DOI  :  10.1016/j.jmmm.2017.06.036

来源: Elsevier

【 摘 要 】

We perform micromagnetic simulations of the magnetization distribution in inverse opal-like structures (IOLS) made from ferromagnetic materials (nickel and cobalt). It is shown that the unit cell of these complex structures, whose characteristic length is approximately 700 nm, can be divided into a set of structural elements some of which behave like Ising-like objects. A spin-ice behavior of IOLS is observed in a broad range of external magnetic fields. Numerical results describe successfully the experimental hysteresis curves of the magnetization in Ni- and Co-based IOLS. We conclude that ferromagnetic IOLS can be considered as the first realization of three-dimensional artificial spin ice. The problem is discussed of optimal geometrical properties and material characteristics of IOLS for the spin-ice rule fulfillment. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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