Enhancement in Thermally Generated Spin Voltage at the Interfaces between Pd and NiFe2O4 Films Grown on Lattice-Mat

Enhanced magnon spin transport in NiFe2O4 thin films on a lattice-matched substrate

“…32 An enhanced longitudinal SSE effect was reported on such NFO films. 33 It can be expected that the nonlocal transport properties of a) j.shan@rug.nl magnon spin are also elevated in these NFO films, as we discuss in this paper.…”

“…v T is related to the elastic constant C 44 and material density ρ by C 44 = ρv 2 T , 50,51 and is determined to be 3968 m/s for NFO using C 44 =82.3 GPa and ρ = 5230 kg/m 3 . 33,52 We assume that magnons in NFO can be also described by a parabolic dispersion relation like for YIG…”

“…NFO films were grown by pulsed laser deposition, in the same way as described in Refs. 32,33 . Prior to further processes, the 450nm-thick sample was characterized by superconducting quantum interference device (SQUID) magnetometry, exhibiting an in-plane coercive field lower than 5 mT (see Fig.…”

Measurement of the heat flux normalized spin Seebeck coefficient of thin films as a function of temperature

“…where JQ = Q A is the heat flux passing through the sample (Q is the heat applied and A is the cross-sectional area of the sample). S J Q has been shown to be a more reliable measure of the SSE, especially for thin films, and has been used to quantify the SSE performance of YIG:Pt, 8,9 Fe 3 O 4 :Pt, 11 NiFe 2 O 4 :Pd, 12 and Co 2 MnSi:Pt. 13 This measurement has the advantage of being insensitive to thermal interface resistances in the measurement, as well as any thermal shunting across the thin film's substrate.…”

Chiral mesostructured NiFe2O4 films with chirality induced spin selectivity

“…This has been achieved through various physical or chemical preparation methods to obtain nanoparticles, nanorods, nanowires, and arrays on different substrates. 19–28 However, the fabrication of homochiral structured NiFe 2 O 4 still poses a challenge due to the absence of effective symmetry-breaking during the phase transition and crystal growth procedures.…”