English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Magnetism and exchange interaction of small rare-earth clusters; Tb as a representative

MPS-Authors
/persons/resource/persons21397

Bowlan,  John
Molecular Physics, Fritz Haber Institute, Max Planck Society;

Locator
There are no locators available
Fulltext (public)

srep19676.pdf
(Publisher version), 754KB

Supplementary Material (public)
There is no public supplementary material available
Citation

Peters, L., Ghosh, S., Sanyal, B., Dijk, C. v., Bowlan, J., Heer, W. d., et al. (2016). Magnetism and exchange interaction of small rare-earth clusters; Tb as a representative. Scientific Reports, 6: 19676. doi:doi:10.1038/srep19676.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0029-7FB8-F
Abstract
Here we follow, both experimentally and theoretically, the development of magnetism in Tb clusters from the atomic limit, adding one atom at a time. The exchange interaction is, surprisingly, observed to drastically increase compared to that of bulk, and to exhibit irregular oscillations as a function of the interatomic distance. From electronic structure theory we find that the theoretical magnetic moments oscillate with cluster size in exact agreement with experimental data. Unlike the bulk, the oscillation is not caused by the RKKY mechanism. Instead, the inter-atomic exchange is shown to be driven by a competition between wave-function overlap of the 5d shell and the on-site exchange interaction, which leads to a competition between ferromagnetic double-exchange and antiferromagnetic super-exchange. This understanding opens up new ways to tune the magnetic properties of rare-earth based magnets with nano-sized building blocks.