Outputs (139)

Enhanced skyrmion metastability under applied strain in FeGe (2022)
Journal Article
Littlehales, M., Turnbull, L., Wilson, M., Birch, M., Popescu, H., Jaouen, N., …Hatton, P. (2022). Enhanced skyrmion metastability under applied strain in FeGe. Physical Review B, 106(21), Article 214434. https://doi.org/10.1103/physrevb.106.214434

Mechanical straining of skyrmion hosting materials has previously demonstrated increased phase stability through the expansion of the skyrmion equilibrium pocket. Additionally, metastable skyrmions can be generated via rapid field cooling to form sig... Read More about Enhanced skyrmion metastability under applied strain in FeGe.

Confinement of Skyrmions in Nanoscale FeGe Device-like Structures (2022)
Journal Article
Twitchett-Harrison, A. C., Loudon, J. C., Pepper, R. A., Birch, M. T., Fangohr, H., Midgley, P. A., …Hatton, P. D. (2022). Confinement of Skyrmions in Nanoscale FeGe Device-like Structures. ACS Applied Electronic Materials, 4(9), 4427 - 4437. https://doi.org/10.1021/acsaelm.2c00692

Skyrmion-based devices have been proposed as a promising solution for low-energy data storage. These devices include racetrack or logic structures and require skyrmions to be confined in regions with dimensions comparable to the size of a single skyr... Read More about Confinement of Skyrmions in Nanoscale FeGe Device-like Structures.

X-ray holographic imaging of magnetic surface spirals in FeGe lamellae (2022)
Journal Article
Turnbull, L., Littlehales, M., Wilson, M., Birch, M., Popescu, H., Jaouen, N., …Hatton, P. (2022). X-ray holographic imaging of magnetic surface spirals in FeGe lamellae. Physical Review B, 106(6), Article 064422. https://doi.org/10.1103/physrevb.106.064422

Isotropic helimagnets are known to host a diverse range of chiral magnetic states. In 2016, Rybakov et al., theorized the presence of a surface-pinned stacked spin spiral phase [F. N. Rybakov et al., New J. Phys. 18, 045002 (2016)], which has yet to... Read More about X-ray holographic imaging of magnetic surface spirals in FeGe lamellae.

Toggle-like current-induced Bloch point dynamics of 3D skyrmion strings in a room temperature nanowire (2022)
Journal Article
Birch, M., Cortés-Ortuño, D., Litzius, K., Wintz, S., Schulz, F., Weigand, M., …Schütz, G. (2022). Toggle-like current-induced Bloch point dynamics of 3D skyrmion strings in a room temperature nanowire. Nature Communications, 13(1), Article 3630. https://doi.org/10.1038/s41467-022-31335-y

Research into practical applications of magnetic skyrmions, nanoscale solitons with interesting topological and transport properties, has traditionally focused on two dimensional (2D) thin-film systems. However, the recent observation of novel three... Read More about Toggle-like current-induced Bloch point dynamics of 3D skyrmion strings in a room temperature nanowire.

Experimental evidence of a change of exchange anisotropy sign with temperature in Zn-substituted Cu2OSeO3 (2021)
Journal Article
Moody, S., Nielsen, P., Wilson, M., Venero, D. A., Štefančič, A., Balakrishnan, G., & Hatton, P. (2021). Experimental evidence of a change of exchange anisotropy sign with temperature in Zn-substituted Cu2OSeO3. Physical Review Research, 3(4), Article 043149. https://doi.org/10.1103/physrevresearch.3.043149

We report small-angle neutron scattering from the conical state in a single crystal of Zn-substituted Cu 2 OSeO 3 . Using a 3D vector-field magnet to reorient the conical wave vector, our measurements show that the magnitude of the conical wave vecto... Read More about Experimental evidence of a change of exchange anisotropy sign with temperature in Zn-substituted Cu2OSeO3.

Topological defect-mediated skyrmion annihilation in three dimensions (2021)
Journal Article
Birch, M. T., Cortés-Ortuño, D., Khanh, N. D., Seki, S., Štefančič, A., Balakrishnan, G., …Hatton, P. D. (2021). Topological defect-mediated skyrmion annihilation in three dimensions. Communications Physics, 4(1), https://doi.org/10.1038/s42005-021-00675-4

The creation and annihilation of magnetic skyrmions are mediated by three-dimensional topological defects known as Bloch points. Investigation of such dynamical processes is important both for understanding the emergence of exotic topological spin te... Read More about Topological defect-mediated skyrmion annihilation in three dimensions.

Deriving the skyrmion Hall angle from skyrmion lattice dynamics (2021)
Journal Article
Brearton, R., Turnbull, L., Verezhak, J., Balakrishnan, G., Hatton, P., van der Laan, G., & Hesjedal, T. (2021). Deriving the skyrmion Hall angle from skyrmion lattice dynamics. Nature Communications, 12(1), Article 2723. https://doi.org/10.1038/s41467-021-22857-y

Magnetic skyrmions are topologically non-trivial, swirling magnetization textures that form lattices in helimagnetic materials. These magnetic nanoparticles show promise as high efficiency next-generation information carriers, with dynamics that are... Read More about Deriving the skyrmion Hall angle from skyrmion lattice dynamics.

Position-dependent stability and lifetime of the skyrmion state in nickel-substituted Cu2OSeO3 (2020)
Journal Article
Crisanti, M., Birch, M., Wilson, M., Moody, S., Štefančič, A., Huddart, B., …Cubitt, R. (2020). Position-dependent stability and lifetime of the skyrmion state in nickel-substituted Cu2OSeO3. Physical Review B, 102(22), Article 224407. https://doi.org/10.1103/physrevb.102.224407

We report spatially resolved small-angle neutron-scattering measurements of the conical and skyrmion states of a bulk single crystal of nickel-substituted Cu2OSeO3, with a nominal concentration of Ni of 14%. We observe a significant spatial dependenc... Read More about Position-dependent stability and lifetime of the skyrmion state in nickel-substituted Cu2OSeO3.

Tilted X-Ray Holography of Magnetic Bubbles in MnNiGa Lamellae (2020)
Journal Article
Turnbull, L. A., Birch, M. T., Laurenson, A., Bukin, N., Burgos-Parra, E. O., Popescu, H., …Hatton, P. D. (2021). Tilted X-Ray Holography of Magnetic Bubbles in MnNiGa Lamellae. ACS Nano, 15(1), 387-395. https://doi.org/10.1021/acsnano.0c07392

Nanoscopic lamellae of centrosymmetric ferromagnetic alloys have recently been reported to host the biskyrmion spin texture; however, this has been disputed as the misidentication of topologically trivial type-II magnetic bubbles. Here we demonstrate... Read More about Tilted X-Ray Holography of Magnetic Bubbles in MnNiGa Lamellae.

Anisotropy-induced depinning in the Zn-substituted skyrmion host Cu2OSeO3 (2020)
Journal Article
Birch, M., Moody, S., Wilson, M., Crisanti, M., Bewley, O., Štefančič, A., …Hatton, P. (2020). Anisotropy-induced depinning in the Zn-substituted skyrmion host Cu2OSeO3. Physical review B, 102(10), Article 104424. https://doi.org/10.1103/physrevb.102.104424

Magnetic skyrmions are nanosized topological spin textures stabilized by a delicate balance of magnetic energy terms. The chemical substitution of the underlying crystal structure of skyrmion-hosting materials offers a route to manipulate these energ... Read More about Anisotropy-induced depinning in the Zn-substituted skyrmion host Cu2OSeO3.

Real-space imaging of confined magnetic skyrmion tubes (2020)
Journal Article
Birch, M., Cortés-Ortuño, D., Turnbull, L., Wilson, M., Groß, F., Träger, N., …Hatton, P. (2020). Real-space imaging of confined magnetic skyrmion tubes. Nature Communications, 11, Article 1726. https://doi.org/10.1038/s41467-020-15474-8

Magnetic skyrmions are topologically nontrivial particles with a potential application as information elements in future spintronic device architectures. While they are commonly portrayed as two dimensional objects, in reality magnetic skyrmions are... Read More about Real-space imaging of confined magnetic skyrmion tubes.

Stability and metastability of skyrmions in thin lamellae of Cu2OSeO3 (2020)
Journal Article
Wilson, M., Birch, M., Štefančič, A., Twitchett-Harrison, A., Balakrishnan, G., Hicken, T., …Hatton, P. (2020). Stability and metastability of skyrmions in thin lamellae of Cu2OSeO3. Physical Review Research, 2(1), Article 013096. https://doi.org/10.1103/physrevresearch.2.013096

We report small-angle x-ray scattering measurements of the skyrmion lattice in two 200-nm-thick Cu2OSeO3 lamellae aligned with the applied magnetic field parallel to the out of plane [110] or [100] crystallographic directions. Our measurements show t... Read More about Stability and metastability of skyrmions in thin lamellae of Cu2OSeO3.

Linking gas and galaxies at high redshift: MUSE surveys the environments of six damped Lyα systems at z ≈ 3 (2019)
Journal Article
Mackenzie, R., Fumagalli, M., Theuns, T., Hatton, D. J., Garel, T., Cantalupo, S., …Trayford, J. (2019). Linking gas and galaxies at high redshift: MUSE surveys the environments of six damped Lyα systems at z ≈ 3. Monthly Notices of the Royal Astronomical Society, 487(4), 5070-5096. https://doi.org/10.1093/mnras/stz1501

We present results from a survey of galaxies in the elds of six z 3 Damped Lyman systems (DLAs) using the Multi Unit Spectroscopic Explorer (MUSE) at the Very Large Telescope (VLT). We report a high detection rate of up to 80% of galaxies within 1000... Read More about Linking gas and galaxies at high redshift: MUSE surveys the environments of six damped Lyα systems at z ≈ 3.

Measuring the formation energy barrier of skyrmions in zinc-substituted Cu2OSeO3 (2019)
Journal Article
Wilson, M., Crisanti, M., Barker, C., Štefančič, A., White, J., Birch, M., …Hatton, P. (2019). Measuring the formation energy barrier of skyrmions in zinc-substituted Cu2OSeO3. Physical Review B, 99(17), Article 174421. https://doi.org/10.1103/physrevb.99.174421

We report small-angle neutron scattering (SANS) measurements of the skyrmion lattice in (Cu0.976Zn0.024 )2OSeO3 under the application of electric and magnetic fields. These measurements show an expansion of the skyrmion lattice stability region with... Read More about Measuring the formation energy barrier of skyrmions in zinc-substituted Cu2OSeO3.

Do Images of Biskyrmions Show Type-II Bubbles? (2019)
Journal Article
Loudon, J. C., Twitchett-Harrison, A. C., Cortés-Ortuño, D., Birch, M. T., Turnbull, L. A., Štefančič, A., …Hatton, P. D. (2019). Do Images of Biskyrmions Show Type-II Bubbles?. Advanced Materials, 31(16), Article 1806598. https://doi.org/10.1002/adma.201806598

The intense research effort investigating magnetic skyrmions and their applications for spintronics has yielded reports of more exotic objects including the biskyrmion, which consists of a bound pair of counter‐rotating vortices of magnetization. Bis... Read More about Do Images of Biskyrmions Show Type-II Bubbles?.

Origin of skyrmion lattice phase splitting in Zn-substituted Cu2OSeO3 (2018)
Journal Article
Štefančič, A., Moody, S., Hicken, T., Birch, M., Balakrishnan, G., Barnett, S., …Lancaster, T. (2018). Origin of skyrmion lattice phase splitting in Zn-substituted Cu2OSeO3. Physical Review Materials, 2(11), Article 111402(R). https://doi.org/10.1103/physrevmaterials.2.111402

We present an investigation into the structural and magnetic properties of Zn-substituted Cu2OSeO3, a system in which the skyrmion lattice (SkL) phase in the magnetic field–temperature phase diagram was previously seen to split as a function of incre... Read More about Origin of skyrmion lattice phase splitting in Zn-substituted Cu2OSeO3.

Polymorphism in Cu2ZnSnS4 and new off-stoichiometric crystal structure types (2017)
Journal Article
Bosson, C. J., Birch, M. T., Halliday, D. P., Tang, C. C., Kleppe, A. K., & Hatton, P. D. (2017). Polymorphism in Cu2ZnSnS4 and new off-stoichiometric crystal structure types. Chemistry of Materials, 29(22), 9829-9839. https://doi.org/10.1021/acs.chemmater.7b04010

Cu2ZnSnS4 (CZTS) is a very promising material for the absorber layer in sustainable thin-film solar cells. Its photovoltaic performance is currently limited by crystal structure disorder, which causes fluctuations in electrostatic potential that decr... Read More about Polymorphism in Cu2ZnSnS4 and new off-stoichiometric crystal structure types.

Cation disorder and phase transitions in the structurally complex solar cell material Cu2ZnSnS4 (2017)
Journal Article
Bosson, C., Birch, M., Halliday, D., Knight, K., Gibbs, A., & Hatton, P. (2017). Cation disorder and phase transitions in the structurally complex solar cell material Cu2ZnSnS4. Journal of Materials Chemistry A: materials for energy and sustainability, 5(32), 16672-16680. https://doi.org/10.1039/c7ta03603e

Cu2ZnSnS4 (CZTS) is a technologically important and complex quaternary semiconductor and a highly promising material for the absorber layer in sustainable thin film solar cells. Its photovoltaic performance is currently limited by low open-circuit vo... Read More about Cation disorder and phase transitions in the structurally complex solar cell material Cu2ZnSnS4.

Elucidation of the helical spin structure of FeAs (2017)
Journal Article
Frawley, T., Schoonmaker, R., Lee, S., Du, C., Steadman, P., Strempfer, J., …Hatton, P. (2017). Elucidation of the helical spin structure of FeAs. Physical Review B, 95(6), Article 064424. https://doi.org/10.1103/physrevb.95.064424

We present the results of resonant x-ray scattering measurements and electronic structure calculations on the monoarsenide FeAs. We elucidate details of the magnetic structure, showing the ratio of ellipticity of the spin helix is larger than previou... Read More about Elucidation of the helical spin structure of FeAs.

Charge and spin coupling in magnetoresistive oxygen-vacancy strontium ferrate SrFeO3–δ (2016)
Journal Article
Lee, S., Frawley, T., Yao, C., Lai, Y., Du, C., Hatton, P., …Huang, D. (2016). Charge and spin coupling in magnetoresistive oxygen-vacancy strontium ferrate SrFeO3–δ. New Journal of Physics, 18(9), Article 093033. https://doi.org/10.1088/1367-2630/18/9/093033

Using magnetization, conductivity and x-ray scattering measurements, we demonstrate that the giant magnetoresistance of the oxygen-deficient ferrite SrFeO2.875±0.02 is a consequence of the coupling between the charge and spin order parameters and the... Read More about Charge and spin coupling in magnetoresistive oxygen-vacancy strontium ferrate SrFeO3–δ.