TERASWITCH - Towards low dissipation THz-induced switching of magnetic materials

Simulations of magnetization reversal in FM/AFM bilayers with THz frequency pulses (2023)
Journal Article
Hirst, J., Ruta, S., Jackson, J., & Ostler, T. (2023). Simulations of magnetization reversal in FM/AFM bilayers with THz frequency pulses. Scientific reports, 13(1), Article 12270. https://doi.org/10.1038/s41598-023-39175-6

It is widely known that antiferromagnets (AFMs) display a high frequency response in the terahertz (THz) range, which opens up the possibility for ultrafast control of their magnetization for next generation data storage and processing applications.... Read More about Simulations of magnetization reversal in FM/AFM bilayers with THz frequency pulses.

Timescales and contribution of heating and helicity effect in helicity-dependent all-optical switching (2022)
Journal Article
Li, G.-Q., Zheng, X.-Y., Wang, J.-L., Lu, X.-Y., Wu, J., Cai, J.-W., Meng, H., Liu, B., Ostler, T. A., & Xu, Y.-B. (2023). Timescales and contribution of heating and helicity effect in helicity-dependent all-optical switching. Rare Metals, 42(1), 234-243. https://doi.org/10.1007/s12598-022-02117-8

The heating and helicity effects induced by circularly polarized laser excitation are entangled in the helicity-dependent all-optical switching (HD-AOS), which hinders understanding the magnetization dynamics involved. Here, applying a dual-pump lase... Read More about Timescales and contribution of heating and helicity effect in helicity-dependent all-optical switching.

A Temperature Dependent Micromagnetic Model of the Antiferromagnet Mn 2 Au: A Multiscale Approach (2022)
Journal Article
Hirst, J., Atxitia, U., Ruta, S., Jackson, J., Petit, L., & Ostler, T. (2022). A Temperature Dependent Micromagnetic Model of the Antiferromagnet Mn 2 Au: A Multiscale Approach. Physical review B: Condensed matter and materials physics, 106(9), Article 094402. https://doi.org/10.1103/PhysRevB.106.094402

Antiferromagnets (AFMs) are strong candidates for the future spintronic and memory applications largely because of their inherently fast dynamics and lack of stray fields, with Mn2Au being one of the most promising. For the numerical modelling of mag... Read More about A Temperature Dependent Micromagnetic Model of the Antiferromagnet Mn 2 Au: A Multiscale Approach.

Unifying femtosecond and picosecond single-pulse magnetic switching in Gd-Fe-Co (2021)
Journal Article
Jakobs, F., Ostler, T. A., Lambert, C. H., Yang, Y., Salahuddin, S., Wilson, R. B., Gorchon, J., Bokor, J., & Atxitia, U. (2021). Unifying femtosecond and picosecond single-pulse magnetic switching in Gd-Fe-Co. Physical Review B, 103(10), Article 104422. https://doi.org/10.1103/PhysRevB.103.104422

Many questions are still open regarding the physical mechanisms behind the magnetic switching in Gd-Fe-Co alloys by single optical pulses. Phenomenological models suggest a femtosecond scale exchange relaxation between sublattice magnetization as the... Read More about Unifying femtosecond and picosecond single-pulse magnetic switching in Gd-Fe-Co.