TY  - JOUR
AU  - Elmers, H. J.
AU  - Chernenkaya, A.
AU  - Medjanik, K.
AU  - Emmel, M.
AU  - Jakob, G.
AU  - Schönhense, G.
AU  - Gottlob, D.
AU  - Krug, I.
AU  - de Groot, F. M. F.
AU  - Gloskovskii, A.
TI  - Exchange coupling in the correlated electronic states of amorphous GdFe films
JO  - Physical review / B
VL  - 88
IS  - 17
SN  - 1098-0121
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2014-00984
SP  - 174407
PY  - 2013
AB  - The bulk sensitivity of hard x-ray photoelectron spectroscopy in combination with circularly polarized radiation of the P09 beamline at PETRA III enables the investigation of the magnetic properties of capped films. We have determined the temperature dependence of the magnetic circular dichroism in the Fe 2p and in the Gd 3d states in amorphous GdFe films. The magnetic dichroism reflects the stronger temperature dependence of Gd moments compared to Fe moments in agreement with mean-field models. We resolved the exchange split Gd 3d5/2 substates and found a significant temperature dependence of the splitting which is attributed to a temperature dependent part of the exchange energy caused by Stoner-like itinerant states. A comparison of experimental and simulated x-ray photoemission spectra with corresponding data for x-ray absorption spectroscopy exciting the identical core holes clearly demonstrates that the core hole exchange interaction is the origin of the observed multiplet features for Gd.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000326819000001
DO  - DOI:10.1103/PhysRevB.88.174407
UR  - https://juser.fz-juelich.de/record/150951
ER  -