Nanoscale control of heat and spin conductance in artificial spin chains

Abstract

We describe a mechanism to control energy and magnetisation currents in an artificial spin-chain, consisting of an array of Permalloy nano-disks coupled through the magneto-dipolar interaction. The chain is kept out of equilibrium by two thermal baths with different temperatures connected to its ends, which control the current propagation. Transport is enhanced by applying a uniform radio frequency pump field resonating with some of the spin-wave modes of the chain. Moreover, the two currents can be controlled independently by tuning the static field applied on the chain. Thus we describe two effective means for the independent control of coupled currents and the enhancement of thermal and spin-wave conductivity in a realistic magnonics device, suggesting that similar effects could be observed in a large class of nonlinear oscillating systems.

5 pages, 3 figures

References in corpus (8)

• Spin Seebeck insulator
• Heat Transport in low-dimensional systems
• Artificial "spin ice" in a geometrically frustrated lattice of nanoscale ferromagnetic islands
• Theory of magnon-driven spin Seebeck effect
• The nonequilibrium discrete nonlinear Schroedinger equation
• Transport of quantum excitations coupled to spatially extended nonlinear many-body systems
• Coherent energy transport in classical nonlinear oscillators: an analogy with the Josephson effect
• Gauge invariance and geometric phase in nonequilibrium thermodynamics

Cited by in corpus (2)

• Modelling Reservoir Computing with the Discrete Nonlinear Schrödinger Equation
• Dephasing-assisted macrospin transport