Robust Ferromagnetism of Chromium Nanoparticles Formed in Superfluid Helium

Chromium nanoparticles are formed using superfluid helium droplets as the nanoreactors, which are strongly ferromagnetic. The transition from antiferromagentism to ferromagnetism is attributed to atomic‐scale disorder in chromium nanoparticles, leading to abundant unbalanced surface spins. Theoretic...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2017-01, Vol.29 (1), p.np-n/a
Main Authors: Yang, Shengfu, Feng, Cheng, Spence, Daniel, Al Hindawi, Aula M. A. A., Latimer, Elspeth, Ellis, Andrew M., Binns, Chris, Peddis, Davide, Dhesi, Sarnjeet S., Zhang, Liying, Zhang, Yafei, Trohidou, Kalliopi N., Vasilakaki, Marianna, Ntallis, Nikolaos, MacLaren, Ian, de Groot, Frank M. F.
Format: Article
Language:English
Subjects:
Agglomeration
Antiferromagnetism
Chromium
chromium nanoparticles
Droplets
Ferromagnetism
Fluids
Helium
Materials science
Monte Carlo simulations
Nanoparticles
Robustness
superfluid helium droplets
Superfluidity
X‐ray circular dichroism (XMCD)
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Summary:Chromium nanoparticles are formed using superfluid helium droplets as the nanoreactors, which are strongly ferromagnetic. The transition from antiferromagentism to ferromagnetism is attributed to atomic‐scale disorder in chromium nanoparticles, leading to abundant unbalanced surface spins. Theoretical modeling confirms a frustrated aggregation process in superfluid helium due to the antiferromagnetic nature of chromium.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201604277