Volume 116, Number 2, October 2016
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||02 December 2016|
Magnetism and morphology in faceted B2-ordered FeRh nanoparticles
1 CEMES, CNRS UPR 8011 and Université de Toulouse - 29 rue Jeanne Marvig, F-31055 Toulouse, France
2 Department of Engineering Physics, Tsinghua University - 100084 Beijing, China
3 Research Center of Laser Fusion, China Academy of Engineering Physics - Mianyang 621900, China
4 LPCNO, Université de Toulouse, INSA, UPS, CNRS - 135 avenue de Rangueil, F-31077 Toulouse, France
Received: 23 August 2016
Accepted: 16 November 2016
Whereas the bulk equiatomic FeRh alloy with B2 structure is antiferromagnetic (AFM) below 370 K, we demonstrate that the surface configuration can stabilize the low-temperature ferromagnetic (FM) state in FeRh nanoparticles in the 6–10 nm range. The most stable configuration for FM nanoparticles, predicted through first-principles calculations, is obtained in magnetron sputtering synthesized nanoparticles. The structure, morphology and Rh-(100) surface termination are confirmed by aberration-corrected (scanning) transmission electron microscopy. The FM magnetic state is verified by vibrating sample magnetometry experiments. This combined theoretical and experimental study emphasizes the strong interplay between surface configuration, morphology and magnetic state in magnetic nanoparticles.
PACS: 75.75.-c – Magnetic properties of nanostructures / 81.07.Bc – Nanocrystalline materials / 68.35.-p – Solid surfaces and solid-solid interfaces: structure and energetics
© EPLA, 2016
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.