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Abstract
Fe3GeTe2 is a layered crystal which has recently been shown to maintain its itinerant ferromagnetic properties even when atomically thin.
Here, differential phase contrast scanning transmission electron microscopy is used to investigate the domain structure in a Fe3GeTe2 cross-sectional lamella at temperatures ranging from 95 K to 250 K and at nanometre spatial resolution. Below the experimentally determined Curie temperature (TC) of 191 K, stripe domains magnetised along h0001i, bounded with 180º Bloch type domain walls, are observed, transitioning to mixed Bloch-Néel type where the cross-sectional thickness is reduced below 50 nm. When warming towards TC, these domains undergo slight restructuring towards uniform size, before abruptly fading at TC. Localised loss of ferromagnetic order is seen over time, hypothesised to be a frustration of ferromagnetic order from ambient oxidation and basal cracking, which could enable selective modification of the magnetic properties for device applications.
Here, differential phase contrast scanning transmission electron microscopy is used to investigate the domain structure in a Fe3GeTe2 cross-sectional lamella at temperatures ranging from 95 K to 250 K and at nanometre spatial resolution. Below the experimentally determined Curie temperature (TC) of 191 K, stripe domains magnetised along h0001i, bounded with 180º Bloch type domain walls, are observed, transitioning to mixed Bloch-Néel type where the cross-sectional thickness is reduced below 50 nm. When warming towards TC, these domains undergo slight restructuring towards uniform size, before abruptly fading at TC. Localised loss of ferromagnetic order is seen over time, hypothesised to be a frustration of ferromagnetic order from ambient oxidation and basal cracking, which could enable selective modification of the magnetic properties for device applications.
| Original language | English |
|---|---|
| Journal | Nanotechnology |
| Publication status | Accepted/In press - 18 Jan 2021 |
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CDT in Science and Applications of Graphene and Related Nanomaterial
Grigorieva, I. (PI), Burnett, H. (PGR student), Cusworth, E. (PGR student), Deaconu, D.-A. (PGR student), Dumitriu-Iovanescu, A.-D. (PGR student), Kang, Y.-W. (PGR student), Little, J. (PGR student), Rees, E. (PGR student), Selles, F. (PGR student), Shaker, M. (PGR student), Soong, Y.-C. (PGR student), Swindell, J. (PGR student), Tainton, G. (PGR student), Wood, H. (PGR student), Astles, T. (PGR student), Carl, A. (PGR student), Chen, G. (PGR student), Richard De Latour, H. (PGR student), Dowinton, O. (PGR student), Haskell, S. (PGR student), Hills, K. (PGR student), Hoole, C. (PGR student), Huang, Y. (PGR student), Kalsi, T. (PGR student), Powell, L. (PGR student), Quiligotti, K. (PGR student), Rimmer, J. (PGR student), Smith, L. (PGR student), Thornley, W. (PGR student), Yang, J. (PGR student), Young, W. (PGR student), Zhao, M. (PGR student), Al Busaidi, R. (PGR student), Al Ruqeishi, E. (PGR student), Chadha, A. (PGR student), Chen, M. (PGR student), Dennis, G. (PGR student), Dunn, E. (PGR student), Gamblen, E. (PGR student), Gao, Y. (PGR student), Georgantas, Y. (PGR student), Jiang, Z. (PGR student), Karakasidi, A. (PGR student), Mcellistrim, A. (PGR student), Meehan, M. (PGR student), Okwelogu, E. (PGR student), Taylor, M. (PGR student), Wang, W. (PGR student), Xin, B. (PGR student), Castle, C. (PGR student), Clout, P. (PGR student), Dean, S. D. (PGR student), Fordham, A. (PGR student), Griffin, E. (PGR student), Hardwick, T. (PGR student), Hawkins-Pottier, G. (PGR student), Jones, A. (PGR student), Lewthwaite, K. (PGR student), Monteil, S. (PGR student), Moulsdale, C. (PGR student), Mullan, C. (PGR student), Orts Mercadillo, V. (PGR student), Sanderson, D. (PGR student), Skliueva, I. (PGR student), Skuse, C. (PGR student), Steiner, P. (PGR student), Winstanley, B. (PGR student), Barry, D. (PGR student), Brooks, D. (PGR student), Cai, J. (PGR student), Chen, Y. (PGR student), Chen, C. (PGR student), Draude, A. (PGR student), Emmerson, C. (PGR student), Gavriliuc, V. (PGR student), Greaves, M. (PGR student), Higgins, E. (PGR student), Mcmaster, R. (PGR student), Mcnair, R. (PGR student), O'Brien, C. (PGR student), Peasey, A. (PGR student), Pinter, G. (PGR student), Shao, S. (PGR student), Thomas, D. (PGR student), Thomas, D. (PGR student), Tsim, L. T. B. (PGR student), Wengraf, J. (PGR student), Weston, A. (PGR student), Yu, T. (PGR student), De Libero, H. (PGR student), Chan, K. C. (PGR student), Tan, Y. T. (PGR student) & Thomson, T. (CoI)
1/04/14 → 31/10/25
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