Evidence for the collapse of short-range magnetic order in CoO at the Néel temperature
(2011) Europhysics Letters : a letters journal exploring the frontiers of physics — Vol. 94, n° 3 (2011)
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- Abstract
- Auger-photoelectron coincidence spectroscopy is used for investigating the electronic properties of a CoO thin film above and below the magnetic transition temperature (T<inf>N</inf>). By using the dichroic effect in angle-resolved measurements, we identify and assign well-defined high-spin and low-spin structures in spite of the otherwise featureless Auger singles spectra, typically found for open-band systems. The disappearance of the dichroism for temperatures just above T<inf>N</inf> indicates a collapse of the surface short-range magnetic order, presumably due to a strongly reduced exchange field in the surface compared to that in the bulk. Copyright © 2011 EPLA.
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Gotter, R., Offi, F., Ruocco, A., Da Pieve, F., Bartynski, R., Cini, M., & Stefani, G. (2011). Evidence for the collapse of short-range magnetic order in CoO at the Néel temperature. Europhysics Letters : a letters journal exploring the frontiers of physics, 94(3). https://doi.org/10.1209/0295-5075/94/37008 (Original work published 2011)