""Auger-photoelectron coincidence spectroscopy is used for investigating the electronic properties of a CoO thin film above and below the magnetic transition temperature (T(N)). 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(N) 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 (C) EPLA, 2011""
Gotter, R., Offi, F., Ruocco, A., Da Pieve, F., Bartynski, R., Cini, M., et al. (2011). Evidence for the collapse of short-range magnetic order in CoO at the Neel temperature RID G-2497-2011. EUROPHYSICS LETTERS, 94(3), 37008 [10.1209/0295-5075/94/37008].
Evidence for the collapse of short-range magnetic order in CoO at the Neel temperature RID G-2497-2011
OFFI, FRANCESCO;RUOCCO, Alessandro;STEFANI, Giovanni
2011-01-01
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(N)). 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(N) 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 (C) EPLA, 2011""I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
