A 119Sn and 151Eu Mössbauerspectroscopic, magnetic susceptibility, and electrical conductivity investigationof the stannides EuTSn (T = Cu, Pd, Ag, Pt)

Ralf Müllmann; Uta Ernet; Bernd D. Mosel; Hellmut Eckert; Reinhard K. Kremer; Rolf-Dieter Hoffmann; Rainer Pöttgen

doi:10.1039/B100055L

Ralf Müllmann,^a Uta Ernet,^a Bernd D. Mosel,^a Hellmut Eckert,*^a Reinhard K. Kremer,^b Rolf-Dieter Hoffmann^c and Rainer Pöttgen*^c

Author affiliations

* Corresponding authors

^a Institut für Physikalische Chemie, Universität Münster, Schloßplatz 4/7, Münster, Germany
E-mail: eckerth@uni-muenster.de

^b Max-Planck-Institut für Festkörperforschung, Heisenbergstraße 1, Stuttgart, Germany
E-mail: rekre@cesux.mpi-stuttgart.de

^c Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstraße 5–13 (Haus D), München, Germany
E-mail: rapch@cup.uni-muenchen.de

Abstract

The title compounds were prepared from the elements by reaction in sealed tantalum tubes in a high frequency furnace. EuCuSn and EuAgSn crystallize with the KHg₂ type structure with a statistical distribution of the copper (silver) and tin atoms on the mercury position. EuPdSn and EuPtSn adopt the TiNiSi type structure, a ternary ordered version of KHg₂. The four stannides show Curie–Weiss behaviour above 60 K with experimental magnetic moments between 7.75(5) and 8.10(5) µ_B/Eu indicating divalent europium. While EuCuSn remains paramagnetic down to 4.2 K, antiferromagnetic ordering is observed for EuAgSn, EuPdSn and EuPtSn with Néel temperatures of 6.0(5), 15.5(5) and 28.5(5) K, respectively. EuPdSn and EuPtSn show metamagnetic transitions at fields of 2.5(2) and 0.8(1) T, respectively. The stannides EuCuSn, EuPdSn, EuAgSn and EuPtSn are metallic conductors. Temperature dependent ¹⁵¹Eu and ¹¹⁹Sn Mössbauer spectroscopic data confirm the magnetic transition temperatures and yield values of the internal (and transferred) magnetic flux densities. A compilation of the ¹⁵¹Eu isomer shifts for the whole series of EuTX (T = transition metal; X = element of the 3rd, 4th or 5th main group) compounds reveals an interesting linear correlation with the electron count.

Article information

https://doi.org/10.1039/B100055L

Article type

Paper

Submitted

02 Jan 2001

Accepted

02 Feb 2001

First published

01 Mar 2001

Download Citation

J. Mater. Chem., 2001,11, 1133-1140

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A ¹¹⁹Sn and ¹⁵¹Eu Mössbauer spectroscopic, magnetic susceptibility, and electrical conductivity investigation of the stannides EuTSn (T = Cu, Pd, Ag, Pt)

R. Müllmann, U. Ernet, B. D. Mosel, H. Eckert, R. K. Kremer, R. Hoffmann and R. Pöttgen, J. Mater. Chem., 2001, 11, 1133 DOI: 10.1039/B100055L

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