Synthesis, crystal structure and magnetism of Eu3Sc2O5Fe2As2-Reference-Cited by-同舟云学术

Synthesis, crystal structure and magnetism of Eu3Sc2O5Fe2As2

Published:2015-06-23 Issue:9 Volume:70 Page:671-676
ISSN:1865-7117
Container-title:Zeitschrift für Naturforschung B
language:en
Short-container-title:

Author:

Hummel Franziska¹,Tegel Marcus²,Gerke Birgit³,Pöttgen Rainer³,Johrendt Dirk¹

Affiliation:

1. Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5–13, D-81377 München, Germany

2. Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung IFAM, Winterbergstraße 28, D-01277 Dresden

3. Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstrasse 30, 48149 Münster, Germany

Abstract

Abstract The iron arsenide Eu3Fe2O5Fe2As2 was synthesized at 1173–1373 K in a resistance furnace and characterized by X-ray powder diffraction with Rietveld analysis: Sr3Fe2O5Cu2S2 type, I4/mmm, a = 406.40(1) pm, c = 2646.9(1) pm. Layers of edge-sharing FeAs4/4 tetrahedra are separated by perovskite-like oxide blocks. No structural transition occurs in the temperature range from 10 to 300 K. Magnetic measurements have revealed Curie–Weiss behavior with an effective magnetic moment of 7.79 μ B per europium atom in agreement with the theoretical value of 7.94 μ B for Eu2+. A drop in the magnetic susceptibility at 5 K indicates possible antiferromagnetic ordering. 151Eu and 57Fe Mössbauer spectroscopic measurements have confirmed a beginning cooperative magnetic phenomenon by showing significantly broadened spectra at 4.8 K compared to those at 78 K.

Publisher

Walter de Gruyter GmbH

Subject

General Chemistry

Link

https://www.degruyter.com/document/doi/10.1515/znb-2015-0087/pdf

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