Monocrystalline free standing 3D yttrium iron garnet magnon nano resonators

Abstract

Nano resonators in which mechanical vibrations and spin waves can be coupled are an intriguing concept that can be used in quantum information processing to transfer information between different states of excitation. Until now, the fabrication of free standing magnetic nanostructures which host long lived spin wave excitatons and may be suitable as mechanical resonators seemed elusive. We demonstrate the fabrication of free standing monocrystalline yttrium iron garnet (YIG) 3D nanoresonators with nearly ideal magnetic properties. The freestanding 3D structures are obtained using a complex lithography process including room temperature deposition and lift-off of amorphous YIG and subsequent crystallization by annealing. The crystallization nucleates from the substrate and propagates across the structure even around bends over distances of several micrometers to form e.g. monocrystalline resonators as shown by transmission electron microscopy. Spin wave excitations in individual nanostructures are imaged by time resolved scanning Kerr microscopy. The narrow linewidth of the magnetic excitations indicates a Gilbert damping constant of only $\alpha =2.6\times 10^{-4}$ rivalling the best values obtained for epitaxial YIG thin film material. The new fabrication process represents a leap forward in magnonics and magnon mechanics as it provides 3D YIG structures of unprecedented quality. At the same time it demonstrates a completely new route towards the fabrication of free standing crystalline nano structures which may be applicable also to other material systems.

26 pages, 11 figures

References in corpus (20)

• The design and verification of Mumax3
• Hybridizing ferromagnetic magnons and microwave photons in the quantum limit
• High cooperativity in coupled microwave resonator ferrimagnetic insulator hybrids
• Hybrid quantum systems based on magnonics
• Quantum acoustics with superconducting qubits
• Phonon-mediated quantum state transfer and remote qubit entanglement
• Hybrid circuit cavity quantum electrodynamics with a micromechanical resonator
• Generation of coherent spin-wave modes in Yttrium Iron Garnet microdiscs by spin-orbit torque
• Faithful conversion of propagating quantum information to mechanical motion
• Snell's Law for Spin Waves
• Spin-wave propagation in ultra-thin YIG based waveguides
• Mechanically mediated microwave frequency conversion in the quantum regime
• Coupling a superconducting quantum circuit to a phononic crystal defect cavity
• Design and Focused Ion Beam Fabrication of Single Crystal Diamond Nanobeam Cavities
• Low-noise amplification and frequency conversion with a multiport microwave optomechanical device
• Quantum-enabled temporal and spectral mode conversion of microwave signals
• Spin waves in micro-structured yttrium iron garnet nanometer-thick films
• Epitaxial patterning of nanometer-thick Y3Fe5O12 films with low magnetic damping
• Patterned growth of crystalline Y${}_3$Fe${}_5$O${}_{12}$ nanostructures with engineered magnetic shape anisotropy
• Fabrication and magnetic control of Y3Fe5O12 cantilevers

Cited by in corpus (34)

• Roadmap on Spin-Wave Computing
• Hybrid magnonics: physics, circuits and applications for coherent information processing
• Cavity magnomechanics: from classical to quantum
• Coherent coupling of two remote magnonic resonators mediated by superconducting circuits
• Resources of nonlinear cavity magnonics for quantum information
• Microwave-optics Entanglement via Cavity Optomagnomechanics
• Stationary optomagnonic entanglement and magnon-to-optics quantum state transfer via opto-magnomechanics
• Entangling ferrimagnetic magnons with an atomic ensemble via opto-magnomechanics
• Predicted strong coupling of solid-state spins via a single magnon mode
• Controllable Fano-type optical response and four-wave mixing via magnetoelastic coupling in a opto-magnomechanical system
• Low-impedance superconducting microwave resonators for strong coupling to small magnetic mode volumes
• Magnetic anisotropy and GGG substrate stray field in YIG films down to millikelvin temperatures
• Polaromechanics: cavity-magnon polaritons strongly coupled to phonons
• Entangling mechanical vibrations of two massive ferrimagnets by fully exploiting the nonlinearity of magnetostriction
• Integration and characterization of micron-sized YIG structures with very low Gilbert damping on arbitrary substrates
• Magnon squeezing via reservoir-engineered optomagnomechanics
• Zero-field spin waves in YIG nano-waveguides
• Magnon confinement in an all-on-chip YIG cavity resonator using hybrid YIG/Py magnon barriers
• Spin wave localization and guiding by magnon band structure engineering in yttrium iron garnet
• Magnomechanics in suspended magnetic beams
• Dispersionless propagation of ultra-short spin-wave pulses in ultrathin yttrium iron garnet waveguides
• Reconfigurable 3D magnonic crystal: tunable and localized spin-wave excitations in CoFeB meander-shaped film
• Damping Enhancement in YIG at Millikelvin Temperatures due to GGG Substrate
• Laser patterning of magnonic structure via local crystallization of Yittrium Iron Garnet
• Three-dimensional nanoscale control of magnetism in crystalline Yttrium Iron Garnet
• Crystallization Dynamics of Amorphous Yttrium Iron Garnet Thin Films
• Generation of optomicrowave and optomagnonic entanglements in cascaded optomagnomechanical systems
• Single-crystalline YIG flakes with uniaxial in-plane anisotropy and diverse crystallographic orientations
• Nonreciprocal Macroscopic Entanglement through Magnon Squeezing in a Cavity Magnomechanics
• Lateral Solid Phase Epitaxy of Yttrium Iron Garnet
• Photonic crystal cavities based on suspended yttrium iron garnet nanobeams
• Chiral Magnonic Resonators: Rediscovering the Basic Magnetic Chirality in Magnonics
• Phase-switchable nonreciprocal entanglement via magnon squeezing in ring-cavity optomagnomechanics
• Generation of mechanical cat-like states via optomagnomechanics