Angular Harmonic Hall Voltage and Magnetoresistance Measurements of Pt/FeCoB and Pt-Ti/FeCoB Bilayers for Spin Hall Conductivity Determination

The combination of spin‐orbit coupling driven effects and multiferroic tunneling properties is explored experimentally in thin Pt/Co/BaTiO3(BTO)/La2/3Sr1/3MnO3(LSMO) multilayers. The presence of a Pt heavy metal allows for the spin current‐induced magnetization precession of Co upon radio‐frequency charge current injection. The utilization of a BTO ferroelectric tunnel barrier separating the Co and LSMO ferromagnetic electrodes gives rise to both tunneling‐ magnetoresistance and electroresistance. Using the spin‐orbit torque ferromagnetic resonance, the magnetization dynamics of the Co/Pt bilayers is studied at room temperature. Unexpectedly, the magnetization dynamics study in the same geometry performed at low temperature reveals the existence of both Co and LSMO resonance peaks indicating efficient spin current generation both using the spin Hall effect in Pt and spin pumping in LSMO that tunnel via the BTO barrier.

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“…The spin Hall efficiency ξ DL was calculated using the formula: [ 26 ]

\begin{equation} \xi _\mathrm{DL} = \cfrac{\mu _0 M_\mathrm{S} t_\mathrm{Co} H_\mathrm{DL}}{j \hbar /2e} \end{equation}

The value ξ DL = 0.14 was obtained with a negligible contribution of the field‐like term, similar to our previous studies. [ 27 ]…”

Section: Resultsmentioning

confidence: 99%

Spin Hall Induced Magnetization Dynamics in Multiferroic Tunnel Junction

Pawlak

Skowroński

Kuświk

et al. 2023

Adv Elect Materials

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“…V ANE is a contribution of the anomalous Nerst effect. We show the simulation result, along with the experimental results for the corresponding Pt(4.3 nm)/FeCoB(2 nm) sample 49 , in Fig. 6.…”

Section: Angular Harmonic Hall Voltage Detectionmentioning

confidence: 99%

“…Each line is produced by sweeping with the azimuth angle ϕ ∈ [−180°, 180°] at the frequency f of the AC current and measuring the second harmonic output in the mixing voltage of the input current (for details of the experimental setup, see ref. 49 ). The parameters for this system can be found in Supplementary Table 3.…”

Section: Angular Harmonic Hall Voltage Detectionmentioning

confidence: 99%

cmtj: Simulation package for analysis of multilayer spintronic devices

et al. 2023

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We present cmtj—a simulation package for large-scale macrospin analysis of multilayer spintronics devices. Apart from conventional simulations, such as magnetoresistance and magnetisation hysteresis loops, cmtj implements a mathematical model of dynamic experimental techniques commonly used for spintronics devices characterisation, for instance: spin diode ferromagnetic resonance, pulse-induced microwave magnetometry, or harmonic Hall voltage measurements. We find that macrospin simulations offer a satisfactory level of agreement, demonstrated by a variety of examples. As a unified simulation package, cmtj aims to accelerate wide-range parameter search in the process of optimising spintronics devices.

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“…Our model has been thoroughly verified using the field-dependent method [48], here we present a simplified angular variation of the harmonic Hall voltage detection. We show the simulation result, along with the experimental results for the corresponding Pt(4.3nm)/FeCoB(2nm) sample [49], in Fig. 6.…”

Section: Pimmmentioning

confidence: 99%

“…6. Each line is produced by sweeping with the azimuth angle φ ∈ [−180 • , 180 • ] at the frequency excitation of the AC current f and measuring the second harmonic output in the mixing voltage of the input current (for details, see [49]). Very good agreement is found between the experimental data and the simulation results.…”

Section: Pimmmentioning

confidence: 99%

A comprehensive simulation package for analysis of multilayer spintronic devices

Mojsiejuk¹,

Ziętek²,

Grochot³

et al. 2022

Preprint

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We present cmtj -a comprehensive simulation package that allows large-scale macrospin simulations for a variety of multilayer spintronics devices. Apart from conventional static simulations, such as magnetoresistance and magnetisation hysteresis loops, cmtj implements a mathematical model of dynamic experimental techniques commonly used for spintronics devices characterisation, for instance: spin diode ferromagnetic resonance, pulse-induced microwave magnetometry, or harmonic Hall voltage measurements. We demonstrate the accuracy of the macrospin simulations on a variety of examples, accompanied by some experimental results.

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Angular Harmonic Hall Voltage and Magnetoresistance Measurements of Pt/FeCoB and Pt-Ti/FeCoB Bilayers for Spin Hall Conductivity Determination

Cited by 4 publications

References 43 publications

Spin Hall Induced Magnetization Dynamics in Multiferroic Tunnel Junction

Spin Hall Induced Magnetization Dynamics in Multiferroic Tunnel Junction

cmtj: Simulation package for analysis of multilayer spintronic devices

A comprehensive simulation package for analysis of multilayer spintronic devices

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