Complex temperature dependence of coupling and dissipation of cavity-magnon polaritons from milliKelvin to room temperature

Abstract

Hybridized magnonic-photonic systems are key components for future information processing technologies such as storage, manipulation or conversion of data both in the classical (mostly at room temperature) and quantum (cryogenic) regime. In this work, we investigate a YIG sphere coupled strongly to a microwave cavity over the full temperature range from $290\mathrm{K}$ down to $30\mathrm{mK}$. The cavity-magnon polaritons are studied from the classical to the quantum regime where the thermal energy is less than one resonant microwave quanta, i.e. at temperatures below $1\mathrm{K}$. We compare the temperature dependence of the coupling strength $g_{\mathrm{eff}}(T)$, describing the strength of coherent energy exchange between spin ensemble and cavity photon, to the temperature behavior of the saturation magnetization evolution $M_{\mathrm{s}}(T)$ and find strong deviations at low temperatures. The temperature dependence of magnonic disspation is governed at intermediate temperatures by rare earth impurity scattering leading to a strong peak at $40$K. The linewidth ${\kappa }_{\mathrm{m}}$ decreases to $1.2$MHz at $30$mK, making this system suitable as a building block for quantum electrodynamics experiments. We achieve an electromagnonic cooperativity in excess of $20$ over the entire temperature range, with values beyond $100$ in the milliKelvin regime as well as at room temperature. With our measurements, spectroscopy on strongly coupled magnon-photon systems is demonstrated as versatile tool for spin material studies over large temperature ranges. Key parameters are provided in a single measurement, thus simplifying investigations significantly.

arXiv comment10 pages , 9 figures in total

References in corpus (15)

• Quantum Simulation
• Hybrid quantum circuits: Superconducting circuits interacting with other quantum systems
• Strongly coupled magnons and cavity microwave photons
• Hybridizing ferromagnetic magnons and microwave photons in the quantum limit
• High Cooperativity Cavity QED with Magnons at Microwave Frequencies
• Spin Pumping in Electrodynamically Coupled Magnon-Photon Systems
• Hybrid quantum circuit with a superconducting qubit coupled to a spin ensemble
• Efficient and robust analysis of complex scattering data under noise in microwave resonators
• Exchange Magnon-Polaritons in Microwave Cavities
• Analog quantum simulation of the Rabi model in the ultra-strong coupling regime
• Increased low-temperature damping in yttrium iron garnet thin films
• Temperature dependent magnetic damping of yttrium iron garnet spheres
• Magnetic spheres in microwave cavities
• Gilbert damping of magnetostatic modes in a yttrium iron garnet sphere
• Study of the cavity-magnon-polariton transmission line shape

Cited by in corpus (32)

• Hybrid quantum systems based on magnonics
• Roadmap on Spin-Wave Computing
• Hybrid magnonics: physics, circuits and applications for coherent information processing
• Strong magnon-photon coupling in ferromagnet-superconducting resonator thin-film devices
• Microwave magnon damping in YIG films at millikelvin temperatures
• Control of the Coupling Strength and the Linewidth of a Cavity-Magnon Polariton
• Magnon-Phonon Quantum Correlation Thermometry
• Unveiling a Pump-Induced Magnon Mode via its Strong Interaction with Walker Modes
• Non-local coupling between antiferromagnets and ferromagnets in cavities
• Twist-induced Near-field Thermal Switch Using Nonreciprocal Surface Magnon-Polaritons
• Steering between Level Repulsion and Attraction: Broad tunability of Two-Port Driven Cavity Magnon-Polaritons
• Introducing coherent time control to cavity-magnon-polariton modes
• Strong magnon-photon coupling with chip-integrated YIG in the zero-temperature limit
• Magnons at low excitations: Observation of incoherent coupling to a bath of two-level-systems
• Propagating spin-wave spectroscopy in nanometer-thick YIG films at millikelvin temperatures
• Hybrid Architecture for Engineering Magnonic Quantum Networks
• Magnon-photon coupling in a non-collinear magnetic insulator Cu${}_2$OSeO${}_3$
• An Electromagnetic Approach to Cavity Spintronics
• Second order nonlinearity induced multipartite entanglement in a hybrid magnon cavity QED system
• Strong coupling of Fe-Co alloy with ultralow damping to superconducting co-planar waveguide resonators
• Universal Characterisation of Cavity--Magnon Polariton Coupling Strength Verified in Modifiable Microwave Cavity
• Interplay of magnetization dynamics with microwave waveguide at cryogenic temperatures
• Coherent pumping of high momentum magnons by light
• Physical Signatures of Fermion-Coupled Axion Dark Matter
• Single-mode magnon-polariton lasing and amplification controlled by dissipative coupling
• Damping Enhancement in YIG at Millikelvin Temperatures due to GGG Substrate
• Wavenumber-dependent magnetic losses in YIG-GGG heterostructures at millikelvin temperatures
• Magnon Bose-Einstein condensate and supercurrents over a wide temperature range
• YSGAG: The Ideal Substrate for YIG in Quantum Magnonics
• Strong Coupling of Magnons to Microwave Photons in Three-Dimensional Printed Resonators
• Driven-dissipative Quantum Dynamics in Cavity Magnon-Polariton System
• Cryogenic Magnomechanics for Thermometry Applications