Abstract
This article reports results of experimental investigation of the spin wave interference over large distances in the Y3Fe2(FeO4)3 waveguide using Brillouin-Mandelstam spectroscopy. Two coherent spin waves are excited by the micro-antennas fabricated at the edges of the waveguide. The amplitudes of the input spin waves are adjusted to provide approximately the same intensity in the central region of the waveguide. The relative phase between the excited spin waves is controlled by the phase shifter. The change of the local intensity distribution in the standing spin wave is monitored using Brillouin-Mandelstam light scattering spectroscopy. Experimental data demonstrate the oscillation of the scattered light intensity depending on the relative phase of the interfering spin waves. The oscillations of the intensity, tunable via the relative phase shift, are observed as far as 7.5 mm away from the spin-wave generating antennas at room temperature. The obtained results are important for developing techniques for remote control of spin currents, with potential applications in spin-based memory and logic devices.
Highlights
Magnon spintronics is the emerging field of spintronics concerned with structures, devices, and circuits aimed to benefit from spin currents carried by spin waves.[1]
Brillouin-Mandelstam spectroscopy (BMS) is a powerful technique allowing for visualization of the spin waves in magnetic microstructures.[9,10,11]
Our objective is to study the standing spin waves in a ferrite waveguide using BMS in order to determine the degree of control of the spin wave interference with the relative phase shift and estimating distances over which such control is efficient
Summary
Magnon spintronics is the emerging field of spintronics concerned with structures, devices, and circuits aimed to benefit from spin currents carried by spin waves.[1] The utilization of spin waves opens a new route to magnetic logic circuits.[2] There are several important advantages of using spin waves as information carriers. Understanding of the spin wave interference phenomena is the key to development of novel magnonic devices.[6,7,8] Brillouin-Mandelstam spectroscopy (BMS) is a powerful technique allowing for visualization of the spin waves in magnetic microstructures.[9,10,11] In this work, we report results of the experimental study of the spin wave interference in the Y3Fe2(FeO4)[3] waveguide using BMS.
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