Indium flux-growth of Eu2AuGe3

A new germanide with an AlB2 superstructure

C. Peter Sebastian, Christos D. Malliakas, Maria Chondroudi, Inga Schellenberg, Sudhindra Rayaprol, Rolf Dieter Hoffmann, Rainer Pöttgen, Mercouri G Kanatzidis

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

The germanide Eu2AuGe3 was obtained as large single crystals in high yield from a reaction of the elements in liquid indium. At room temperature Eu2AuGe3 crystallizes with the Ca 2AgSi3 type, space group Fmmm, an ordered variant of the AlB2 type: a = 857.7(4), b = 1485.5(10), c = 900.2(4) pm. The gold and germanium atoms build up slightly distorted graphite-like layers which consist of Ge6 and Au2Ge4 hexagons, leading to two different hexagonal-prismatic coordination environments for the europium atoms. Magnetic susceptibility data showed Curie-Weiss law behavior above 50 K and antiferromagnetic ordering at 11 K. The experimentally measured magnetic moment indicates divalent europium. The compound exhibits a distinct magnetic anisotropy based on single crystal measurements and at 5 K it shows a metamagnetic transition at ∼10 kOe. Electrical conductivity measurements show metallic behavior. The structural transition at 130 K observed in the single crystal data was very well supported by the conductivity measurements. 151Eu Mössbauer spectroscopic data show an isomer shift of -11.24 mm/s at 77 K, supporting the divalent character of europium. In the magnetically ordered regime one observes superposition of two signals with hyperfine fields of 26.0 (89%) and 3.5 (11%) T, respectively, indicating differently ordered domains.

Original languageEnglish
Pages (from-to)9574-9580
Number of pages7
JournalInorganic Chemistry
Volume49
Issue number20
DOIs
Publication statusPublished - Oct 18 2010

Fingerprint

Europium
Indium
europium
indium
Single crystals
Fluxes
single crystals
Germanium
Atoms
Curie-Weiss law
Graphite
hexagons
Magnetic anisotropy
Magnetic moments
Magnetic susceptibility
Gold
Isomers
atoms
germanium
isomers

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry

Cite this

Sebastian, C. P., Malliakas, C. D., Chondroudi, M., Schellenberg, I., Rayaprol, S., Hoffmann, R. D., ... Kanatzidis, M. G. (2010). Indium flux-growth of Eu2AuGe3: A new germanide with an AlB2 superstructure. Inorganic Chemistry, 49(20), 9574-9580. https://doi.org/10.1021/ic101340a

Indium flux-growth of Eu2AuGe3 : A new germanide with an AlB2 superstructure. / Sebastian, C. Peter; Malliakas, Christos D.; Chondroudi, Maria; Schellenberg, Inga; Rayaprol, Sudhindra; Hoffmann, Rolf Dieter; Pöttgen, Rainer; Kanatzidis, Mercouri G.

In: Inorganic Chemistry, Vol. 49, No. 20, 18.10.2010, p. 9574-9580.

Research output: Contribution to journalArticle

Sebastian, CP, Malliakas, CD, Chondroudi, M, Schellenberg, I, Rayaprol, S, Hoffmann, RD, Pöttgen, R & Kanatzidis, MG 2010, 'Indium flux-growth of Eu2AuGe3: A new germanide with an AlB2 superstructure', Inorganic Chemistry, vol. 49, no. 20, pp. 9574-9580. https://doi.org/10.1021/ic101340a
Sebastian CP, Malliakas CD, Chondroudi M, Schellenberg I, Rayaprol S, Hoffmann RD et al. Indium flux-growth of Eu2AuGe3: A new germanide with an AlB2 superstructure. Inorganic Chemistry. 2010 Oct 18;49(20):9574-9580. https://doi.org/10.1021/ic101340a
Sebastian, C. Peter ; Malliakas, Christos D. ; Chondroudi, Maria ; Schellenberg, Inga ; Rayaprol, Sudhindra ; Hoffmann, Rolf Dieter ; Pöttgen, Rainer ; Kanatzidis, Mercouri G. / Indium flux-growth of Eu2AuGe3 : A new germanide with an AlB2 superstructure. In: Inorganic Chemistry. 2010 ; Vol. 49, No. 20. pp. 9574-9580.
@article{d366a06a4ddc4a77b0179c25af6cbcab,
title = "Indium flux-growth of Eu2AuGe3: A new germanide with an AlB2 superstructure",
abstract = "The germanide Eu2AuGe3 was obtained as large single crystals in high yield from a reaction of the elements in liquid indium. At room temperature Eu2AuGe3 crystallizes with the Ca 2AgSi3 type, space group Fmmm, an ordered variant of the AlB2 type: a = 857.7(4), b = 1485.5(10), c = 900.2(4) pm. The gold and germanium atoms build up slightly distorted graphite-like layers which consist of Ge6 and Au2Ge4 hexagons, leading to two different hexagonal-prismatic coordination environments for the europium atoms. Magnetic susceptibility data showed Curie-Weiss law behavior above 50 K and antiferromagnetic ordering at 11 K. The experimentally measured magnetic moment indicates divalent europium. The compound exhibits a distinct magnetic anisotropy based on single crystal measurements and at 5 K it shows a metamagnetic transition at ∼10 kOe. Electrical conductivity measurements show metallic behavior. The structural transition at 130 K observed in the single crystal data was very well supported by the conductivity measurements. 151Eu M{\"o}ssbauer spectroscopic data show an isomer shift of -11.24 mm/s at 77 K, supporting the divalent character of europium. In the magnetically ordered regime one observes superposition of two signals with hyperfine fields of 26.0 (89{\%}) and 3.5 (11{\%}) T, respectively, indicating differently ordered domains.",
author = "Sebastian, {C. Peter} and Malliakas, {Christos D.} and Maria Chondroudi and Inga Schellenberg and Sudhindra Rayaprol and Hoffmann, {Rolf Dieter} and Rainer P{\"o}ttgen and Kanatzidis, {Mercouri G}",
year = "2010",
month = "10",
day = "18",
doi = "10.1021/ic101340a",
language = "English",
volume = "49",
pages = "9574--9580",
journal = "Inorganic Chemistry",
issn = "0020-1669",
publisher = "American Chemical Society",
number = "20",

}

TY - JOUR

T1 - Indium flux-growth of Eu2AuGe3

T2 - A new germanide with an AlB2 superstructure

AU - Sebastian, C. Peter

AU - Malliakas, Christos D.

AU - Chondroudi, Maria

AU - Schellenberg, Inga

AU - Rayaprol, Sudhindra

AU - Hoffmann, Rolf Dieter

AU - Pöttgen, Rainer

AU - Kanatzidis, Mercouri G

PY - 2010/10/18

Y1 - 2010/10/18

N2 - The germanide Eu2AuGe3 was obtained as large single crystals in high yield from a reaction of the elements in liquid indium. At room temperature Eu2AuGe3 crystallizes with the Ca 2AgSi3 type, space group Fmmm, an ordered variant of the AlB2 type: a = 857.7(4), b = 1485.5(10), c = 900.2(4) pm. The gold and germanium atoms build up slightly distorted graphite-like layers which consist of Ge6 and Au2Ge4 hexagons, leading to two different hexagonal-prismatic coordination environments for the europium atoms. Magnetic susceptibility data showed Curie-Weiss law behavior above 50 K and antiferromagnetic ordering at 11 K. The experimentally measured magnetic moment indicates divalent europium. The compound exhibits a distinct magnetic anisotropy based on single crystal measurements and at 5 K it shows a metamagnetic transition at ∼10 kOe. Electrical conductivity measurements show metallic behavior. The structural transition at 130 K observed in the single crystal data was very well supported by the conductivity measurements. 151Eu Mössbauer spectroscopic data show an isomer shift of -11.24 mm/s at 77 K, supporting the divalent character of europium. In the magnetically ordered regime one observes superposition of two signals with hyperfine fields of 26.0 (89%) and 3.5 (11%) T, respectively, indicating differently ordered domains.

AB - The germanide Eu2AuGe3 was obtained as large single crystals in high yield from a reaction of the elements in liquid indium. At room temperature Eu2AuGe3 crystallizes with the Ca 2AgSi3 type, space group Fmmm, an ordered variant of the AlB2 type: a = 857.7(4), b = 1485.5(10), c = 900.2(4) pm. The gold and germanium atoms build up slightly distorted graphite-like layers which consist of Ge6 and Au2Ge4 hexagons, leading to two different hexagonal-prismatic coordination environments for the europium atoms. Magnetic susceptibility data showed Curie-Weiss law behavior above 50 K and antiferromagnetic ordering at 11 K. The experimentally measured magnetic moment indicates divalent europium. The compound exhibits a distinct magnetic anisotropy based on single crystal measurements and at 5 K it shows a metamagnetic transition at ∼10 kOe. Electrical conductivity measurements show metallic behavior. The structural transition at 130 K observed in the single crystal data was very well supported by the conductivity measurements. 151Eu Mössbauer spectroscopic data show an isomer shift of -11.24 mm/s at 77 K, supporting the divalent character of europium. In the magnetically ordered regime one observes superposition of two signals with hyperfine fields of 26.0 (89%) and 3.5 (11%) T, respectively, indicating differently ordered domains.

UR - http://www.scopus.com/inward/record.url?scp=78549243806&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78549243806&partnerID=8YFLogxK

U2 - 10.1021/ic101340a

DO - 10.1021/ic101340a

M3 - Article

VL - 49

SP - 9574

EP - 9580

JO - Inorganic Chemistry

JF - Inorganic Chemistry

SN - 0020-1669

IS - 20

ER -