Temperature Dependence of Magnetically Dead Layers in Ferromagnetic Thin-Films

Tokac, M.; Kinane, C.J.; Atkinson, D.; Hindmarch, A.T.

doi:10.1063/1.4997366

Tailoring magnon modes by extending square, kagome, and trigonal spin ice lattices vertically via interlayer coupling of trilayer nanomagnets. (2024)
Journal Article
de Rojas, J., Atkinson, D., & Adeyeye, A. O. (2024). Tailoring magnon modes by extending square, kagome, and trigonal spin ice lattices vertically via interlayer coupling of trilayer nanomagnets. Journal of Physics: Condensed Matter, 36(41), Article 415805. https://doi.org/10.1088/1361-648X/ad5d3f

In this work high-frequency magnetization dynamics and statics of artificial spin-ice lattices with different geometric nanostructure array configurations are studied where the individual nanostructures are composed of ferromagnetic/non-magnetic/ferr... Read More about Tailoring magnon modes by extending square, kagome, and trigonal spin ice lattices vertically via interlayer coupling of trilayer nanomagnets..

Mapping the transition from quasi-2D to 3D spin textures in NiFe nanomagnets (2024)
Journal Article
Scott, J. R., Atkinson, D., & Adeyeye, A. O. (2024). Mapping the transition from quasi-2D to 3D spin textures in NiFe nanomagnets. Applied Physics Letters, 124(22), https://doi.org/10.1063/5.0212429

Tuning magnon spectra via interlayer coupling in pseudo-3D nanostructured artificial spin ice arrays (2023)
Journal Article
de Rojas, J., Atkinson, D., & Adeyeye, A. O. (2023). Tuning magnon spectra via interlayer coupling in pseudo-3D nanostructured artificial spin ice arrays. Applied Physics Letters, 123(23), Article 232407. https://doi.org/10.1063/5.0177447

We have investigated the static and dynamic behavior of “pseudo-3D” trilayer square artificial spin ice structures. The trilayer stack comprises of two ferromagnetic Ni81Fe19 (Permalloy, Py) layers with 30 and 70 nm thickness, separated by a nonmagne... Read More about Tuning magnon spectra via interlayer coupling in pseudo-3D nanostructured artificial spin ice arrays.

Non-uniform Gd distribution and magnetization profiles within GdCoFe alloy thin films (2023)
Journal Article
Inyang, O., Swindells, C., Rianto, D., Bouchenoire, L., Morris, R. J. H., Merkulov, A., …Atkinson, D. (2023). Non-uniform Gd distribution and magnetization profiles within GdCoFe alloy thin films. Applied Physics Letters, 123(12), Article 122403. https://doi.org/10.1063/5.0165423

Rare earth (RE):transition metal (TM) ferrimagnetic alloys continue to attract significant attention for spintronics. This work focuses on the elemental distribution of RE and TM elements throughout the thickness of nominally uniform films and the re... Read More about Non-uniform Gd distribution and magnetization profiles within GdCoFe alloy thin films.

Synthetic route to low damping in ferromagnetic thin-films (2023)
Journal Article
Azzawi, S., Umerski, A., Sampaio, L. C., Bunyaev, S. A., Kakazei, G. N., & Atkinson, D. (2023). Synthetic route to low damping in ferromagnetic thin-films. APL Materials, 11(8), Article 081108. https://doi.org/10.1063/5.0147172

Previous theory indicated that the individual monolayers within transition metal ferromagnet thin-films contribute different magnitudes to the total ferromagnetic damping. Here, the aim was to investigate if the thin-film damping could be reduced by... Read More about Synthetic route to low damping in ferromagnetic thin-films.

Interface enhanced precessional damping in spintronic multilayers: A perspective (2022)
Journal Article
Swindells, C., & Atkinson, D. (2022). Interface enhanced precessional damping in spintronic multilayers: A perspective. Journal of Applied Physics, 131(17), Article 170902. https://doi.org/10.1063/5.0080267

In the past two decades, there have been huge developments in the understanding of damping in multilayered thin films and, more generally, in spin-transport in spintronic systems. In multilayered ferromagnetic (FM)/non-magnetic (NM) thin-film systems... Read More about Interface enhanced precessional damping in spintronic multilayers: A perspective.

Magnetic damping in ferromagnetic/heavy-metal systems: The role of interfaces and the relation to proximity-induced magnetism (2022)
Journal Article
Swindells, C., Głowiński, H., Choi, Y., Haskel, D., Michałowski, P., Hase, T., …Atkinson, D. (2022). Magnetic damping in ferromagnetic/heavy-metal systems: The role of interfaces and the relation to proximity-induced magnetism. Physical Review B, 105(9), Article 094433. https://doi.org/10.1103/physrevb.105.094433

Damping and spin transport in spintronic multilayered systems continues to be a topic of active research. The enhancement of damping in ferromagnet (FM)/spacer layer (SL)/heavy-metal (HM) thin-film systems was studied for Co 25 Fe 75 / SL / Pt with a... Read More about Magnetic damping in ferromagnetic/heavy-metal systems: The role of interfaces and the relation to proximity-induced magnetism.

Proximity induced magnetism and the enhancement of damping in ferromagnetic/heavy metal systems (2021)
Journal Article
Swindells, C., Głowiński, H., Choi, Y., Haskel, D., Michałowski, P., Hase, T., …Atkinson, D. (2021). Proximity induced magnetism and the enhancement of damping in ferromagnetic/heavy metal systems. Applied Physics Letters, 119(15), Article 152401. https://doi.org/10.1063/5.0064336

The relationship between proximity induced magnetism (PIM) at the heavy metal/ferromagnet interface and spin-transport across such interfaces has generated significant debate. To investigate the link between the two, element specific X-ray magnetic c... Read More about Proximity induced magnetism and the enhancement of damping in ferromagnetic/heavy metal systems.

Optical properties and carrier dynamics in Co-doped ZnO nanorods (2020)
Journal Article
Sivan, A. K., Galán-González, A., Di Mario, L., Tappy, N., Hernández-Ferrer, J., Catone, D., …Martelli, F. (2021). Optical properties and carrier dynamics in Co-doped ZnO nanorods. Nanoscale Advances, 3(1), 214-222. https://doi.org/10.1039/d0na00693a

The controlled modification of the electronic properties of ZnO nanorods via transition metal doping is reported. A series of ZnO nanorods were synthesized by chemical bath growth with varying Co content from 0 to 20 atomic% in the growth solution. O... Read More about Optical properties and carrier dynamics in Co-doped ZnO nanorods.

Proximity-induced magnetism in Pt layered with rare-earth–transition-metal ferrimagnetic alloys (2020)
Journal Article
Swindells, C., Nicholson, B., Inyang, O., Choi, Y., Hase, T., & Atkinson, D. (2020). Proximity-induced magnetism in Pt layered with rare-earth–transition-metal ferrimagnetic alloys. Physical Review Research, 2(3), Article 033280. https://doi.org/10.1103/physrevresearch.2.033280

The proximity-induced moment (PIM) in heavy metal layers may play a significant role in heterostructured spintronic systems. In particular, the PIM of a heavy metal adjacent to a magnetic layer has been linked to interfacial spin transport behavior.... Read More about Proximity-induced magnetism in Pt layered with rare-earth–transition-metal ferrimagnetic alloys.

Cobalt-Doped ZnO Nanorods Coated with Nanoscale Metal-Organic Framework Shells for Water-Splitting Photoanodes (2020)
Journal Article
Galan Gonzalez, A., Sivan, A. K., Hernández Ferrer, J., Bowen, L., Di Mario, L., Martelli, F., …Atkinson, D. (2020). Cobalt-Doped ZnO Nanorods Coated with Nanoscale Metal-Organic Framework Shells for Water-Splitting Photoanodes. ACS Applied Nano Material, 3(8), 7781-7788. https://doi.org/10.1021/acsanm.0c01325

Developing highly efficient and stable photoelectrochemical (PEC) water splitting electrodes via inexpensive, liquid phase processing is one of the key challenges for the conversion of solar energy into hydrogen for sustainable energy production. ZnO... Read More about Cobalt-Doped ZnO Nanorods Coated with Nanoscale Metal-Organic Framework Shells for Water-Splitting Photoanodes.

The role of low Gd concentrations on magnetisation behaviour in rare earth:transition metal alloy films (2020)
Journal Article
Inyang, O., Rafiq, A., Swindells, C., Ali, S., & Atkinson, D. (2020). The role of low Gd concentrations on magnetisation behaviour in rare earth:transition metal alloy films. Scientific Reports, 10(1), Article 9767. https://doi.org/10.1038/s41598-020-66595-5

The magnetisation reversal behaviour as a function of composition was studied in low rare earth concentration alloys. 30 nm thick rare earth:transition-metal films of composition GdxCo100−x, GdxFe100−x and Gdx(Co50Fe50)100−x were prepared by magnetro... Read More about The role of low Gd concentrations on magnetisation behaviour in rare earth:transition metal alloy films.

Ferromagnetic Resonance of FeNi/Cu/FeNi Thin Film on Coplanar Waveguide with Operating Frequency of 1 to 20 GHz (2020)
Journal Article
Shcherbinin, S., Volchkov, S., Swindells, C., Nicholson, B., Atkinson, D., & Kurlyandskaya, G. (2020). Ferromagnetic Resonance of FeNi/Cu/FeNi Thin Film on Coplanar Waveguide with Operating Frequency of 1 to 20 GHz. Russian Physics Journal, 63(1), 1-8. https://doi.org/10.1007/s11182-020-01995-8

The paper presents the calculation results of the coplanar waveguide geometry using the method of conformal mapping and computerized simulation with COMSOL Multiphysics software. Ferromagnetic FeNi/Cu/FeNi magneto-sensitive elements are fabricated in... Read More about Ferromagnetic Resonance of FeNi/Cu/FeNi Thin Film on Coplanar Waveguide with Operating Frequency of 1 to 20 GHz.

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.

Amorphous InGaZnO and metal oxide semiconductor devices: an overview and current status (2019)
Journal Article
Troughton, J., & Atkinson, D. (2019). Amorphous InGaZnO and metal oxide semiconductor devices: an overview and current status. Journal of Materials Chemistry C Materials for optical and electronic devices, 7(40), 12388-12414. https://doi.org/10.1039/c9tc03933c

The past 20 years has witnessed a rapid expansion of applications using metal oxide semiconductor devices that ranges from displays technology, to clothing and packaging. Details of these technological applications have been the subject of technical... Read More about Amorphous InGaZnO and metal oxide semiconductor devices: an overview and current status.

Controlling the growth of single crystal ZnO nanowires by tuning the atomic layer deposition parameters of the ZnO seed layer (2019)
Journal Article
Galan-Gonzalez, A., Gallant, A., Zeze, D. A., & Atkinson, D. (2019). Controlling the growth of single crystal ZnO nanowires by tuning the atomic layer deposition parameters of the ZnO seed layer. Nanotechnology, 30(30), Article 305602. https://doi.org/10.1088/1361-6528/ab186a

Semiconducting nanowires (NWs) offer exciting prospects for a wide range of technological applications. The translation of NW science into technology requires reliable high quality large volume production. This study provides an in-depth investigatio... Read More about Controlling the growth of single crystal ZnO nanowires by tuning the atomic layer deposition parameters of the ZnO seed layer.

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.

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.

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