Mössbauer studies on the Fe(II) oxalate spin ladder Na2Fe2(C2O4)3(H2O)2

Mössbauer studies on the Fe(II) oxalate spin ladder Na2Fe2(C2O4)3(H2O)2

We investigated the magnetic correlations in the Fe spin ladder system Na2Fe2(C2O4)3(H2O)2 by magnetic susceptibility and 57Fe Mossbauer spectroscopy between 2 and 310 K. The susceptibility exhibits a broad maximum at about 20 K indicating antiferromagnetic coupling and a S = 0 dimer formation. The...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Journal of magnetism and magnetic materials 2004-05, Vol.272-276, p.152-153
Hauptverfasser: Kreitlow, J, Baabe, D, Wolter, A.U.B, Süllow, S, Litterst, F.J, Price, D.J, Klauss, H.-H
Format: Artikel
Sprache:eng
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:We investigated the magnetic correlations in the Fe spin ladder system Na2Fe2(C2O4)3(H2O)2 by magnetic susceptibility and 57Fe Mossbauer spectroscopy between 2 and 310 K. The susceptibility exhibits a broad maximum at about 20 K indicating antiferromagnetic coupling and a S = 0 dimer formation. The Mossbauer measurements reveal a temperature dependent quadrupole splitting and a non-magnetic ground state. The orbital ground state is identified as a singlet with an excited doublet at 383 K in the T2g manifold.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2003.12.676