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Magnon Confinement in an All-on-Chip YIG Cavity Resonator Using Hybrid YIG/Py Magnon Barriers
Obed Alves Santos1,2, Bart J van Wees1
1Physics of Nanodevices Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4 AG, Groningen 9747, The Netherlands.
Nano Letters
|October 11, 2023
Summary
Researchers demonstrated magnon confinement in a Yttrium Iron Garnet (YIG) cavity, paving the way for advanced magnonic devices. This on-chip control of magnons was verified using spin-pumping measurements.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanotechnology
Background:
- Confining magnons in cavities is crucial for developing magnonic devices.
- Such devices aim to emulate established photonic and electronic components.
Purpose of the Study:
- To demonstrate proof-of-concept magnon confinement in an all-on-chip Yttrium Iron Garnet (YIG) cavity.
- To establish a method for controlling coherent magnons on a chip.
Main Methods:
- Fabrication of a YIG cavity using lithography, defined by YIG/Permalloy bilayers.
- Utilizing modified magnetic properties of YIG films to create magnon-confining regions.
- Measuring spin-pumping voltage peaks using a platinum (Pt) strip placed within the cavity.
Main Results:
- Successful confinement of magnons within the designed YIG cavity.
- Observed multiple spin-pumping voltage peaks corresponding to magnon confinement.
- Experimental results align with calculated spin-wave resonance modes for the YIG slab geometry.
Conclusions:
- The lithographic technique enables the fabrication of micrometer-sized YIG cavities for magnon control.
- Spin-pumping voltage measurements in nanometer-sized Pt strips serve as a noninvasive local detector for magnon resonance intensity.
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