Skip to main content

Research Repository

Advanced Search

All Outputs (53)

Two Magnon Scattering Contribution to the Ferromagnetic Resonance Linewidth of Pt(Ir)/CoFeTaB/Ir(Pt) Thin Films (2023)
Journal Article
Tokaç, M., Kazan, S., Özkal, B., Al-jawfi, N., Rameev, B., Nicholson, B., & Hindmarch, A. T. (2023). Two Magnon Scattering Contribution to the Ferromagnetic Resonance Linewidth of Pt(Ir)/CoFeTaB/Ir(Pt) Thin Films. Applied Magnetic Resonance, 54(10), 1053-1064. https://doi.org/10.1007/s00723-023-01601-3

The magnetic properties of Pt/CoFeTaB/Ir and Ir/CoFeTaB/Pt trilayer thin films have been studied using angular- and temperature-dependent ferromagnetic resonance. This enables quantitative determination of the various contributions to the magnetic be... Read More about Two Magnon Scattering Contribution to the Ferromagnetic Resonance Linewidth of Pt(Ir)/CoFeTaB/Ir(Pt) Thin Films.

Magnetoelastic resonance as a probe for exchange springs at antiferromagnet-ferromagnet interfaces (2022)
Journal Article
Seemann, K., Gomonay, O., Mokrousov, Y., Hörner, A., Valencia, S., Klamser, P., …Fischer, P. (2022). Magnetoelastic resonance as a probe for exchange springs at antiferromagnet-ferromagnet interfaces. Physical Review B, 105(14), Article 144432. https://doi.org/10.1103/physrevb.105.144432

In prototype ferromagnet-antiferromagnet interfaces we demonstrate that surface acoustic waves can be used to identify complex magnetic phases arising upon evolution of exchange springs in an applied field. Applying sub-GHz surface acoustic waves to... Read More about Magnetoelastic resonance as a probe for exchange springs at antiferromagnet-ferromagnet interfaces.

Spin current propagation through ultra-thin insulating layers in multilayered ferromagnetic systems (2020)
Journal Article
Swindells, C., Hindmarch, A., Gallant, A., & Atkinson, D. (2020). Spin current propagation through ultra-thin insulating layers in multilayered ferromagnetic systems. Applied Physics Letters, 116(4), Article 042403. https://doi.org/10.1063/1.5119787

Spin current pumping from a ferromagnet through an insulating layer into a heavy metal was studied in a CoFeB/SiO2/Pt system in relation to the thickness and interfacial structure of the insulating layer. The propagation of spin current from the ferr... Read More about Spin current propagation through ultra-thin insulating layers in multilayered ferromagnetic systems.

Threshold interface magnetization required to induce magnetic proximity effect (2019)
Journal Article
Inyang, O., Bouchenoire, L., Nicholson, B., Tokaç, M., Rowan-Robinson, R., Kinane, C., & Hindmarch, A. (2019). Threshold interface magnetization required to induce magnetic proximity effect. Physical Review B, 100(17), Article 174418. https://doi.org/10.1103/physrevb.100.174418

Proximity-induced magnetization (PIM) has broad implications across interface-driven spintronics applications employing spin currents. We directly determine the scaling between PIM in Pt and the temperaturedependent interface magnetization in an adja... Read More about Threshold interface magnetization required to induce magnetic proximity effect.

Spin transport across the interface in ferromagnetic/nonmagnetic systems (2019)
Journal Article
Swindells, C., Hindmarch, A., Gallant, A., & Atkinson, D. (2019). Spin transport across the interface in ferromagnetic/nonmagnetic systems. Physical Review B, 99(6), Article 064406. https://doi.org/10.1103/physrevb.99.064406

Understanding interfacial spin transport is key to developing magnetoelectonic devices, however, the exact nature of the parameters involved is unclear. Here, we report a detailed ferromagnetic resonance-based spintransport analysis on a variety of s... Read More about Spin transport across the interface in ferromagnetic/nonmagnetic systems.

Efficient current-induced magnetization reversal by spin-orbit torque in Pt/Co/Pt (2018)
Journal Article
Rowan-Robinson, R., Hindmarch, A., & Atkinson, D. (2018). Efficient current-induced magnetization reversal by spin-orbit torque in Pt/Co/Pt. Journal of Applied Physics, 124(18), Article 183901. https://doi.org/10.1063/1.5046503

Current-induced magnetization reversal due to spin-orbit torque is demonstrated in an anisotropy controlled Pt/Co/Pt trilayer. The samples were designed to have weak perpendicular magnetic anisotropy, with a measured anisotropy field of (1340±20) Oe.... Read More about Efficient current-induced magnetization reversal by spin-orbit torque in Pt/Co/Pt.

Thickness Dependence of the Dzyaloshinskii-Moriya Interaction in Co2FeAl Ultrathin Films: Effects of Annealing Temperature and Heavy-Metal Material (2018)
Journal Article
Belmeguenai, M., Roussigné, Y., Bouloussa, H., Chérif, S., Stashkevich, A., Nasui, M., …Bouchenoire, L. (2018). Thickness Dependence of the Dzyaloshinskii-Moriya Interaction in Co2FeAl Ultrathin Films: Effects of Annealing Temperature and Heavy-Metal Material. Physical Review Applied, 9(4), Article 044044. https://doi.org/10.1103/physrevapplied.9.044044

The interfacial Dzyaloshinskii-Moriya interaction (IDMI) is investigated in Co2FeAl (CFA) ultrathin films of various thicknesses (0.8 nm ≤ tCFA ≤ 2nm) grown by sputtering on Si substrates, using Pt, W, Ir, and MgO buffer or/and capping layers. Vibrat... Read More about Thickness Dependence of the Dzyaloshinskii-Moriya Interaction in Co2FeAl Ultrathin Films: Effects of Annealing Temperature and Heavy-Metal Material.

The interfacial nature of proximity-induced magnetism and the Dzyaloshinskii-Moriya interaction at the Pt/Co interface (2017)
Journal Article
Rowan-Robinson, R., Stashkevich, A., Roussigne, Y., Belmeguenai, M., Cherif, S., Thiaville, A., …Atkinson, D. (2017). The interfacial nature of proximity-induced magnetism and the Dzyaloshinskii-Moriya interaction at the Pt/Co interface. Scientific Reports, 7(1), Article 16835. https://doi.org/10.1038/s41598-017-17137-z

The Dzyaloshinskii-Moriya interaction has been shown to stabilise Nèel domain walls in magnetic thin films, allowing high domain wall velocities driven by spin current effects. The interfacial Dzyaloshinskii-Moriya interaction (IDMI) occurs at the in... Read More about The interfacial nature of proximity-induced magnetism and the Dzyaloshinskii-Moriya interaction at the Pt/Co interface.

Temperature Dependence of Magnetically Dead Layers in Ferromagnetic Thin-Films (2017)
Journal Article
Tokac, M., Kinane, C., Atkinson, D., & Hindmarch, A. (2017). Temperature Dependence of Magnetically Dead Layers in Ferromagnetic Thin-Films. AIP Advances, 7(11), Article 115022. https://doi.org/10.1063/1.4997366

Polarized neutron reflectometry has been used to study interface magnetism and magnetic dead layers in model amorphous CoFeB:Ta alloy thin-film multilayers with Curie temperatures tuned to be below room-temperature. This allows temperature dependent... Read More about Temperature Dependence of Magnetically Dead Layers in Ferromagnetic Thin-Films.

Magnetic damping phenomena in ferromagnetic thin-films and multilayers (2017)
Journal Article
Azzawi, S., Hindmarch, A., & Atkinson, D. (2017). Magnetic damping phenomena in ferromagnetic thin-films and multilayers. Journal of Physics D: Applied Physics, 50(47), Article 473001. https://doi.org/10.1088/1361-6463/aa8dad

Damped ferromagnetic precession is an important mechanism underpinning the magnetisation processes in ferromagnetic materials. In thin-film ferromagnets and ferromagnetic/non-magnetic multilayers, the role of precession and damping can be critical fo... Read More about Magnetic damping phenomena in ferromagnetic thin-films and multilayers.

Understanding the role of damping and Dzyaloshinskii-Moriya interaction on dynamic domain wall behaviour in platinum-ferromagnet nanowires (2017)
Journal Article
Brandão, J., Azzawi, S., Hindmarch, A., & Atkinson, D. (2017). Understanding the role of damping and Dzyaloshinskii-Moriya interaction on dynamic domain wall behaviour in platinum-ferromagnet nanowires. Scientific Reports, 7(1), Article 4569. https://doi.org/10.1038/s41598-017-04088-8

Heavy metal layers, exemplified by Pt, are known to play a significant role in the magnetization behaviour of thin-film ferromagnets by three distinct mechanisms that can each contribute to the reversal process. These include modifying the local magn... Read More about Understanding the role of damping and Dzyaloshinskii-Moriya interaction on dynamic domain wall behaviour in platinum-ferromagnet nanowires.

Evolution of damping in ferromagnetic/nonmagnetic thin film bilayers as a function of nonmagnetic layer thickness (2016)
Journal Article
Azzawi, S., Ganguly, A., Tokaç, M., Rowan-Robinson, R., Sinha, J., Hindmarch, A., …Atkinson, D. (2016). Evolution of damping in ferromagnetic/nonmagnetic thin film bilayers as a function of nonmagnetic layer thickness. Physical Review B, 93(5), Article 054402. https://doi.org/10.1103/physrevb.93.054402

The evolution of damping in Co/Pt, Co/Au, and Ni81Fe19/Pt bilayers was studied with increasing nonmagnetic (NM) heavy-metal layer thicknesses in the range 0.2nm≤tNM≤10nm, where tNM is the NM layer thickness. Magnetization precession was measured in t... Read More about Evolution of damping in ferromagnetic/nonmagnetic thin film bilayers as a function of nonmagnetic layer thickness.

Tunable Magnetization Dynamics in Interfacially Modified Ni81Fe19/Pt Bilayer Thin Film Microstructures (2015)
Journal Article
Ganguly, A., Azzawi, S., Saha, S., King, J., Rowan-Robinson, R., Hindmarch, A., …Barman, A. (2015). Tunable Magnetization Dynamics in Interfacially Modified Ni81Fe19/Pt Bilayer Thin Film Microstructures. Scientific Reports, 5, Article 17596. https://doi.org/10.1038/srep17596

Interface modification for control of ultrafast magnetic properties using low-dose focused ion beam irradiation is demonstrated for bilayers of two technologically important materials: Ni81Fe19 and Pt. Magnetization dynamics were studied using an all... Read More about Tunable Magnetization Dynamics in Interfacially Modified Ni81Fe19/Pt Bilayer Thin Film Microstructures.

Interfacial Contribution to Thickness Dependent in-plane Anisotropic Magnetoresistance (2015)
Journal Article
Tokaç, M., Wang, M., Jaiswal, S., Rushforth, A., Gallagher, B., Atkinson, D., & Hindmarch, A. (2015). Interfacial Contribution to Thickness Dependent in-plane Anisotropic Magnetoresistance. AIP Advances, 5(12), Article 127108. https://doi.org/10.1063/1.4937556

We have studied in-plane anisotropic magnetoresistance(AMR) in cobaltfilms with overlayers having designed electrically interface transparency. With an electrically opaque cobalt/overlayer interface, the AMR ratio is shown to vary in inverse proporti... Read More about Interfacial Contribution to Thickness Dependent in-plane Anisotropic Magnetoresistance.

Interfacial Structure Dependent Spin Mixing Conductance in Cobalt Thin Films (2015)
Journal Article
Tokaç, M., Bunyaev, S., Kakazei, G., Schmool, D., Atkinson, D., & Hindmarch, A. (2015). Interfacial Structure Dependent Spin Mixing Conductance in Cobalt Thin Films. Physical Review Letters, 115(5), Article 056601. https://doi.org/10.1103/physrevlett.115.056601

Enhancement of Gilbert damping in polycrystalline cobalt thin-film multilayers of various thicknesses, overlayered with copper or iridium, was studied in order to understand the role of local interface structure in spin pumping. X-ray diffraction ind... Read More about Interfacial Structure Dependent Spin Mixing Conductance in Cobalt Thin Films.

Time-domain detection of current controlled magnetization damping in Pt/Ni81Fe19 bilayer and determination of Pt spin Hall angle (2014)
Journal Article
Ganguly, A., Rowan-Robinson, R., Haldar, A., Jaiswal, S., Sinha, J., Hindmarch, A., …Barman, A. (2014). Time-domain detection of current controlled magnetization damping in Pt/Ni81Fe19 bilayer and determination of Pt spin Hall angle. Applied Physics Letters, 105(11), Article 112409. https://doi.org/10.1063/1.4896277

The effect of spin torque from the spin Hall effect in Pt/Ni81Fe19 rectangular bilayer film was investigated using time-resolved magneto-optical Kerr microscopy. Current flow through the stack resulted in a linear variation of effective damping up to... Read More about Time-domain detection of current controlled magnetization damping in Pt/Ni81Fe19 bilayer and determination of Pt spin Hall angle.

Enhanced electron-magnon scattering in ferromagnetic thin films and the breakdown of the Mott two-current model (2014)
Journal Article
Rowan-Robinson, R., Hindmarch, A., & Atkinson, D. (2014). Enhanced electron-magnon scattering in ferromagnetic thin films and the breakdown of the Mott two-current model. Physical review B, 90(10), https://doi.org/10.1103/physrevb.90.104401

Electron-magnon spin-flip scattering in thin films was studied by investigating the thickness dependence of the anisotropic magnetoresistance (AMR) effect and spin-wave stiffness. The absolute resistivity change due to the AMR effect (Δρ) in Ni, Ni:V... Read More about Enhanced electron-magnon scattering in ferromagnetic thin films and the breakdown of the Mott two-current model.

Local control of magnetic damping in ferromagnetic/non-magnetic bilayers by interfacial intermixing induced by focused ion-beam irradiation (2014)
Journal Article
King, J., Ganguly, A., Burn, D., Pal, S., Sallabank, E., Hase, T., …Atkinson, D. (2014). Local control of magnetic damping in ferromagnetic/non-magnetic bilayers by interfacial intermixing induced by focused ion-beam irradiation. Applied Physics Letters, 104(24), Article 242410. https://doi.org/10.1063/1.4883860

The influence of interfacial intermixing on the picosecond magnetization dynamics of ferromagnetic/non-magnetic thin-film bilayers was studied. Low-dose focused-ion-beam irradiation was used to induce intermixing across the interface between a 10 nm... Read More about Local control of magnetic damping in ferromagnetic/non-magnetic bilayers by interfacial intermixing induced by focused ion-beam irradiation.

Spin-orbit torque opposing the Oersted torque in ultrathin Co/Pt bilayers (2014)
Journal Article
Skinner, T., Wang, M., Hindmarch, A., Rushforth, A., Irvine, A., Heiss, D., …Ferguson, A. (2014). Spin-orbit torque opposing the Oersted torque in ultrathin Co/Pt bilayers. Applied Physics Letters, 104(6), Article 062401. https://doi.org/10.1063/1.4864399

Current-induced torques in ultrathin Co/Pt bilayers were investigated using an electrically driven ferromagnetic resonance technique. The angle dependence of the resonances, detected by a rectification effect as a voltage, was analysed to determine t... Read More about Spin-orbit torque opposing the Oersted torque in ultrathin Co/Pt bilayers.