Spin caloritronics in a CrBr${}_3$-based magnetic van der Waals heterostructure

Abstract

The recently reported magnetic ordering in insulating two-dimensional (2D) materials, such as chromium triiodide (CrI${}_3$) and chromium tribromide (CrBr${}_3$), opens new possibilities for the fabrication of magneto-electronic devices based on 2D systems. Inevitably, the magnetization and spin dynamics in 2D magnets are strongly linked to Joule heating. Therefore, understanding the coupling between spin, charge and heat, i.e. spin caloritronic effects, is crucial. However, spin caloritronics in 2D ferromagnets remains mostly unexplored, due to their instability in air. Here we develop a fabrication method that integrates spin-active contacts with 2D magnets through hBN encapsulation, allowing us to explore the spin caloritronic effects in these materials. The angular dependence of the thermal spin signal of the CrBr${}_3$/Pt system is studied, for different conditions of magnetic field and heating current. We highlight the presence of a significant magnetic proximity effect from CrBr${}_3$ on Pt revealed by an anomalous Nernst effect in Pt, and suggest the contribution of the spin Seebeck effect from CrBr${}_3$. These results pave the way for future magnonic devices using air-sensitive 2D magnetic insulators.

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Cited by in corpus (12)

• Van der Waals heterostructures for spintronics and opto-spintronics
• Spin and spin current -- From fundamentals to recent progress
• Spin Seebeck Effect: Sensitive Probe for Elementary Excitation, Spin Correlation, Transport, Magnetic Order, and Domains in Solids
• Long distance magnon transport in the van der Waals antiferromagnet CrPS${}_4$
• Electrically Switchable van der Waals Magnon Valves
• Topological Valley Transport of Gapped Dirac Magnons in Bilayer Ferromagnetic Insulators
• The spin-flop transition in the quasi two dimensional antiferromagnet MnPS3 detected via thermally generated magnon transport
• Thermal effects in spintronic materials and devices: an experimentalist's guide
• Magnon dispersion and spin transport in CrCl${}_3$ bilayers under different strain-induced magnetic states
• Quantum Stoner-Wohlfarth model of two-dimensional single domain magnets
• Electrically switchable entanglement channel in van der Waals magnets
• Environmental Screening and Ligand-Field Effects to Magnetism in CrI${}_3$ Monolayer