Field angle dependent resonant dynamics of artificial spin ice lattices

Haldar, Arabinda (2023) Field angle dependent resonant dynamics of artificial spin ice lattices. Nanotechnology, 34 (32). p. 325302. ISSN 0957-4484

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Abstract

Artificial spin ice structures which are networks of coupled nanomagnets arranged on different lattices that exhibit a number of interesting phenomena are promising for future information processing. We report reconfigurable microwave properties in artificial spin ice structures with three different lattice symmetries namely square, kagome, and triangle. Magnetization dynamics are systematically investigated using field angle dependent ferromagnetic resonance spectroscopy. Two distinct ferromagnetic resonance modes are observed in square spin ice structures in contrast with the three well-separated modes in kagome and triangular spin ice structures that are spatially localized at the center of the individual nanomagnets. A simple rotation of the sample placed in magnetic field results in the merging and splitting of the modes due to the different orientations of the nanomagnets with respect to the applied magnetic field. Magnetostatic interactions are found to shift the mode positions after comparing the microwave responses from the array of nanomagnets with control simulations with isolated nanomagnets. Moreover, the extent of the mode splitting has been studied by varying the thickness of the lattice structures. The results have potential implications for microwave filter-type applications which can be operated for a wide range of frequencies with ease of tunability.

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IITH Creators:

IITH Creators	ORCiD
Haldar, Arabinda	https://orcid.org/0000-0002-0490-9719

Item Type:

Article

Uncontrolled Keywords:

artificial spin ice; configurational anisotropy; ferromagnetic resonance; magnonic crystal; symmetry breaking; Magnetic fields; Artificial spin ice; Configurational anisotropy; Field-angle-dependent; Ice lattices; Ice structures; Magnonic crystals; Nanomagnets; Resonant dynamics; Spin ice; Symmetry breakings; Crystal symmetry; Ferromagnetic materials; Ferromagnetic resonance; Ferromagnetism; Ice; Magnetostatics; Microwave filters; Spin dynamics

Subjects:

Others > Dynamics
Physics
Physics > Classical mechanics

Divisions:

Department of Physics

Depositing User:

Mr Nigam Prasad Bisoyi

Date Deposited:

28 Sep 2023 13:22

Last Modified:

28 Sep 2023 13:22

URI:

http://raiithold.iith.ac.in/id/eprint/11721