Spin heat accumulation induced by tunneling from a ferromagnet

Abstract

An electric current from a ferromagnet into a non-magnetic material can induce a spin-dependent electron temperature. Here it is shown that this spin heat accumulation, when created by tunneling from a ferromagnet, produces a non-negligible voltage signal that is comparable to that due to the coexisting electrical spin accumulation and can give a different Hanle spin precession signature. The effect is governed by the spin polarization of the Peltier coefficient of the tunnel contact, its Seebeck coefficient, and the spin heat resistance of the non-magnetic material, which is related to the electrical spin resistance by a spin-Wiedemann-Franz law. Moreover, spin heat injection is subject to a heat conductivity mismatch that is overcome if the tunnel interface has a sufficiently large resistance.

5 pages, 2 figures, plus 5 pages of supplemental material

References in corpus (7)

• Thermal Spin-Transfer Torques in Magnetoelectronic Devices
• Electrical Detection of Spin Accumulation at a Ferromagnet-Semiconductor Interface
• Thermoelectric Effects in Magnetic Nanostructures
• Semiconductors between spin-polarized source and drain
• Contact induced spin relaxation in Hanle spin precession measurements
• Spin injection and detection in lanthanum- and niobium-doped SrTiO3 using the Hanle technique
• Nonequilibrium spin-dependent phenomena in mesoscopic superconductor-normal metal tunnel structures

Cited by in corpus (9)

• Bias induced up to 100% spin-injection and detection polarizations in ferromagnet/bilayer-hBN/graphene/hBN heterostructures
• Spin caloritronics with superconductors: Enhanced thermoelectric effects, generalized Onsager response-matrix, and thermal spin currents
• Nonlinear spin-thermoelectric transport in two-dimensional topological insulators
• Spin-dependent thermoelectric effects in transport through a nanoscopic junction involving spin impurity
• Tunneling Magneto-Thermopower in Magnetic Tunnel Junctions
• Tunneling Anisotropic Thermopower and Seebeck Effects in Magnetic Tunnel Junctions
• Kinetic theory of spin-polarized systems in electric and magnetic fields with spin-orbit coupling: II. RPA response functions and collective modes
• Spin-heat relaxation and thermo-spin diffusion in atomic Bose and Fermi gases
• Seebeck Effect in Nanomagnets