Outputs (10)

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., Tokura, Y., & 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.

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., Cabeza, S., Balakrishnan, G., Hatton, P., & 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.

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., Balakrishnan, G., Fan, R., Steadman, P., Alba Venero, D., Cubitt, R., & Hatton, P. (2020). Anisotropy-induced depinning in the Zn-substituted skyrmion host Cu2OSeO3. Physical review B - Condensed Matter and Materials Physics, 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., Laurenson, A., Bukin, N., Moody, S., Weigand, M., Schütz, G., Popescu, H., Fan, R., Steadman, P., Verezhak, J., Balakrishnan, G., Loudon, J., Twitchett-Harrison, A., Hovorka, O., Fangohr, H., …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., Fan, R., Steadman, P., & 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.

Increased lifetime of metastable skyrmions by controlled doping (2019)
Journal Article
Birch, M., Takagi, R., Seki, S., Wilson, M., Kagawa, F., Štefančič, A., Balakrishnan, G., Fan, R., Steadman, P., Ottley, C., Crisanti, M., Cubitt, R., Lancaster, T., Tokura, Y., & Hatton, P. (2019). Increased lifetime of metastable skyrmions by controlled doping. Physical review B - Condensed Matter and Materials Physics, 100(1), Article 014425. https://doi.org/10.1103/physrevb.100.014425

Previous observations of metastable magnetic skyrmions have shown that close to the equilibrium pocket the metastable state has a short lifetime, and therefore, rapid cooling is required to generate a significant skyrmion population at low temperatur... Read More about Increased lifetime of metastable skyrmions by controlled doping.

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., Balakrishnan, G., Cubitt, R., & 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., Ogrin, F. Y., Burgos-Parra, E. O., Bukin, N., Laurenson, A., Popescu, H., Beg, M., Hovorka, O., Fangohr, H., Midgley, P. A., Balakrishnan, G., & 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?.

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.

Crystal structure and cation disorder in bulk Cu2ZnSnS4 using neutron diffraction and X-ray anomalous scattering (2016)
Presentation / Conference Contribution
Bosson, C., Birch, M., Halliday, D., Knight, K., Tang, C., Kleppe, A., & Hatton, P. (2016, June). Crystal structure and cation disorder in bulk Cu2ZnSnS4 using neutron diffraction and X-ray anomalous scattering. Presented at 2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC), Portland, OR

Cu2ZnSnS4 (CZTS) is a promising material for the absorber layer in sustainable thin film photovoltaic cells, but its best efficiencies are currently limited by low open-circuit voltages, thought to be due to defects such as disorder between the coppe... Read More about Crystal structure and cation disorder in bulk Cu2ZnSnS4 using neutron diffraction and X-ray anomalous scattering.