Above-room-temperature giant thermal conductivity switching in spintronic multilayer

Abstract

Thermal switching provides an effective way for active heat flow control, which has recently attracted increasing attention in terms of nanoscale thermal management technologies. In magnetic and spintronic materials, the thermal conductivity depends on the magnetization configuration: this is the magneto-thermal resistance effect. Here we show that an epitaxial Cu/Co${}_{50}$Fe${}_{50}$ multilayer film exhibits giant magnetic-field-induced modulation of the cross-plane thermal conductivity. The magneto-thermal resistance ratio for the Cu/Co${}_{50}$Fe${}_{50}$ multilayer reaches 150% at room temperature, which is much larger than the previous record high. Although the ratio decreases with increasing the temperature, the giant magneto-thermal resistance effect of ~100% still appears up to 400 K. The magnetic field dependence of the thermal conductivity of the Cu/Co${}_{50}$Fe${}_{50}$ multilayer was observed to be about twice greater than that of the cross-plane electrical conductivity. The observation of the giant magneto-thermal resistance effect clarifies a potential of spintronic multilayers as thermal switching devices.

arXiv comment23 pages, 3 figures, 5 supplemental figures

References in corpus (18)

• Spin Caloritronics
• Phononics: Manipulating heat flow with electronic analogs and beyond
• Ultra-low magnetic damping of a metallic ferromagnet
• Seebeck Effect in Magnetic Tunnel Junctions
• A comprehensive first-principles analysis of phonon thermal conductivity and electron-phonon coupling in different metals
• Observation of the spin Peltier effect
• An electrochemical thermal transistor
• Magnon Valve Effect Between Two Magnetic Insulators
• The Spin Nernst effect in Tungsten
• Finite-temperature violation of the anomalous transverse Wiedemann-Franz law
• Observation of huge thermal spin currents in magnetic multilayers
• Ferroic collinear multilayer magnon spin valve
• Visualization of Anomalous Ettingshausen Effect in a Ferromagnetic Film: Direct Evidence of Different Symmetry from Spin Peltier Effect
• Spin heat accumulation and spin-dependent temperatures in nanopillar spin valves
• Magnon and Phonon Dispersion, Lifetime and Thermal Conductivity of Iron from Spin-Lattice Dynamics Simulations
• Spin diffusion length and polarization of ferromagnetic metals measured by spin-absorption technique in lateral spin valves
• Comparison of the magneto-Peltier and magneto-Seebeck effects in magnetic tunnel junctions
• Tunnel magneto-Seebeck effect

Cited by in corpus (10)

• Spintronic thermal management
• Observation of nonvolatile magneto-thermal switching in superconductors
• Magneto-thermal-switching properties of superconducting Nb
• Large magneto-thermal-switching ratio in superconducting Pb wires
• Capacitor Type Thin-Film Heat Flow Switching Device
• Nonvolatile magneto-thermal switching driven by vortex trapping in commercial In-Sn solder
• Non-equilibrium Magnon Engineering Enabling Significant Thermal Transport Modulation
• Magnon-Driven Magnetothermal Transport in Magnetic Multilayers
• Flavor Nernst effects in quantum paramagnets
• Spin caloritronics: History and future prospects of experiments