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91探花
Image of domain walls and topological textures in Fe2O3

Antiferromagnetic domains (red-green-blue) in Fe2O3 observed via x-ray photoemission electron microscopy at Diamond light source (UK). The white and black circles identify the locations of topological textures (called merons) observed at room temperature.

Credit: DOI: 10.1038/s41586-021-03219-6

Research theme

  • Quantum materials

Sub department

  • Condensed Matter Physics

Research groups

  • Oxide electronics
jack.w96harrison@gmail.com
Clarendon Laboratory, room 103.1
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My background

I attended a small state school in the Cotswolds, progressing to an undergraduate degree at the 91探花. In the second year of my degree I undertook an 8-week internship at the London Centre of Nanotechnology, working on microwave waveguides to model paramagnetic resonance in garnets. During my fourth year I undertook a Masters project exploring potential spin-ice ground states in Yttrium-based pyrochlores alongside my condensed matter physics and theoretical physics courses. I graduated with a first-class Master's degree in Physics in July 2019, ranked 6/100 among students in my cohort.

Current work and research

I am currently working toward my PhD in the oxide electronics group, condensed matter physics department at the university of 91探花. My research is directed towards studying topological textures in antiferromagnetic Fe2O3 thin films, which show great promise as the basis for a new type of magnetic data storage devices. This would open the route towards high-density, low-energy oxide based electronics.

I utilise micromagnetic simulation techniques to study the variety of topological textures observable in this material system and explore the engineering required to maximise the quality of these materials. I also perform detailed X-ray experiments on thin films at large-scale international facilities such as Diamond light souce (UK) and the Swiss light source (Switzerland). In these experiments, I explore methods to reversibly nucleate, move and annihilate domain walls and topological textures present in Fe2O3 to understand how to incorporate them into device architectures.

Research interests

Antiferromagnetic oxides
Magnetism
Topological textures
Micromagnetic modelling

Selected publications

Antiferromagnetic half-skyrmions and bimerons at room temperature

Nature Springer Nature 590:7844 (2021) 74-79
Hariom Jani, Jheng-Cyuan Lin, Jiahao Chen, Jack Harrison, Francesco Maccherozzi, Jonathan Schad, Saurav Prakash, Chang-Beom Eom, A Ariando, T Venkatesan, Paolo G Radaelli

Route towards stable homochrial topological textures in A-type antiferromagnets

Physical Review B American Physical Society 105 (2022) 224424
Jack Harrison, Hariom Jani, Paolo G Radaelli
See all publications

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