Imaging and structure analysis of ferroelectric domains, domain walls, and vortices by scanning electron diffraction

Autor: Ursula Ludacka, Jiali He, Shuyu Qin, Manuel Zahn, Emil Frang Christiansen, Kasper A. Hunnestad, Xinqiao Zhang, Zewu Yan, Edith Bourret, István Kézsmárki, Antonius T. J. van Helvoort, Joshua Agar, Dennis Meier

Publikováno v: npj Computational Materials, Vol 10, Iss 1, Pp 1-8 (2024)

Abstract Direct electron detectors in scanning transmission electron microscopy give unprecedented possibilities for structure analysis at the nanoscale. In electronic and quantum materials, this new capability gives access to, for example, emergent

Externí odkaz: https://doaj.org/article/ea601bb91cab4511a8ea8e12e2d58b04

An enigma in rock magnetism: can microstructures in magnetite cause a threefold increase in the efficiency of NRM acquisition in the Stardalur Basalts?

Autor: Suzanne A McEnroe, Nathan Church, Karl Fabian, Marianne F Stange, Antonius T J van Helvoort

Publikováno v: Geophysical Journal International. 231:835-855

SUMMARY Quaternary lavas of the Stardalur Caldera, 20 km northeast of Reykjavik, Iceland, create a 27 300 nT magnetic anomaly visible in both ground and aeromagnetic surveys. Here, we provide a comprehensive mineralogical and rock magnetic data set t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d647ba3e35b759f55026dbd6cee9bc65
https://doi.org/10.1093/gji/ggac224

Composition Analysis by STEM-EDX of Ternary Semiconductors by Internal References

Autor: Julie S. Nilsen, Antonius T. J. van Helvoort

Publikováno v: Microscopy and Microanalysis

A practical method to determine the composition within ternary heterostructured semiconductor compounds using energy-dispersive X-ray spectroscopy in scanning transmission electron microscopy is presented. The method requires minimal external input f

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::71b755d4d89df8636f1117ea23d78e83
https://doi.org/10.1017/s1431927621013672

Application of a long short-term memory for deconvoluting conductance contributions at charged ferroelectric domain walls

Autor: Didrik Rene Småbråten, Sverre Magnus Selbach, Trygve Magnus Ræder, Stephan Krohns, Joshua C. Agar, Donald M. Evans, Dennis Meier, Edith Bourret, Antonius T. J. van Helvoort, Theodor S. Holstad, Jakob Schaab, Tor Grande, Zewu Yan

Publikováno v: npj Computational Materials, Vol 6, Iss 1, Pp 1-7 (2020)
npj Computational Materials, 6 (1)
npj Computational Materials
npj Computational Materials, vol 6, iss 1

Ferroelectric domain walls are promising quasi-2D structures that can be leveraged for miniaturization of electronics components and new mechanisms to control electronic signals at the nanoscale. Despite the significant progress in experiment and the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::76d0c8928e470b1b1d533dede707132e
http://link.springer.com/article/10.1038/s41524-020-00426-z

The Third Dimension of Ferroelectric Domain Walls

Autor: Erik D. Roede, Konstantin Shapovalov, Thomas J. Moran, Aleksander B. Mosberg, Zewu Yan, Edith Bourret, Andres Cano, Bryan D. Huey, Antonius T. J. van Helvoort, Dennis Meier

Publikováno v: Advanced Materials
Advanced Materials, 34 (36)

Ferroelectric domain walls are quasi-2D systems that show great promise for the development of nonvolatile memory, memristor technology, and electronic components with ultrasmall feature size. Electric fields, for example, can change the domain wall

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::40e16eef50f6cabb76d4751785ccfc9b
https://doi.org/10.1002/adma.202202614