Abstract
The fabrication approach of a magnonic crystal with a step-like hysteresis behavior based on a uniform non-monotonous iron layer made by shadow deposition on a preconfigured substrate is reported. The origin of the step-like hysteresis loop behavior is studied with local and integral magnetometry methods, including First-Order Reversal Curves (FORC) diagram analysis, accompanied with magnetic microstructure dynamics measurements. The results are validated with macroscopic magnetic properties and micromagnetic simulations using the intrinsic switching field distribution model. The proposed fabrication method can be used to produce magnonic structures with the controllable hysteresis plateau region’s field position and width that can be used to control the magnonic crystal’s band structure by changing of an external magnetic field.
Highlights
One of the promising candidates for replacing conventional semiconductor electronics are spin-wave-based devices [1,2,3]
Spin waves are considered as a collective spin oscillation in a magnetic medium similar to plasmon-polaritons in plasmonics [4]
A magnonic device for signal processing requires a special type of waveguide capable of transporting and transforming spin waves at the nanoscale—magnonic crystals [5]
Summary
One of the promising candidates for replacing conventional semiconductor electronics are spin-wave-based devices [1,2,3]. The field of science that studies signal generation and transport with spin waves is called magnonics. A magnonic device for signal processing requires a special type of waveguide capable of transporting and transforming spin waves at the nanoscale—magnonic crystals [5]. Periodical variation of the magnitude and phase of spin waves in magnonic crystals results in the presence of a bandgap structure that prohibits the transportation of certain spin waves [6,7]. This makes magnonic crystals competitive in fields of logic, quantum, and optoelectronic computing along with plasmonics, photonics, and phononics. A comprehensive up-to-date review on the most important applications of magnonics has recently been reported in [8]
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