Journal Article

DESY-2013-01352

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Exchange coupling in the correlated electronic states of amorphous GdFe films

Elmers, H. J. (Corresponding author) ; Chernenkaya, A.Extern* ; Medjanik, K. ; Emmel, M. ; Jakob, G. ; Schönhense, G.Extern* ; Gottlob, D.Extern* ; Krug, I.Extern* ; de Groot, F. M. F. ; Hloskovsky, A.DESY*

2013
APS College Park, Md.

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Please use a persistent id in citations: doi:10.1103/PhysRevB.88.174407

Abstract: 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.

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Contributing Institute(s):

1. PETRA III Extension (FS-PEX)

Research Program(s):

1. PETRA Beamline P09 (POF2-54G14) (POF2-54G14)

Experiment(s):

1. PETRA Beamline P09 (PETRA III)

Appears in the scientific report 2013

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Database coverage:
; ; ; Current Contents - Social and Behavioral Sciences ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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