Structure and properties of the 5.5 K antiferromagnet EuAu2Ge2
(2011) In Zeitschrift für Kristallographie 226(3). p.214-218- Abstract
- A well crystallized sample of EuAti(2)Ge(2) was synthesized by arc-melting of the elements. The structure was refined on the basis of single crystal X-ray diffractometer data: ThCr2Si2 type, 14/mmm, a = 447.3(1), c = 1034.0(4) pm, wR2 = 0.0575, 148 F-2 values and 9 variables. The gold atoms have tetrahedral germanium coordination (261 pm Au-Ge). These AuGe4/4 tetrahedra share four common edges, leading to layers which are connected via Ge-Ge bonds (247 pm). The europium atoms fill cages of coordination number 16 within the [Au2Ge2](delta-) polyanion. Temperature dependent susceptibility measurements show a magnetic moment of 7.79(1)mu(B)/formula unit. Together with the Eu-151 Mossbauer spectroscopic data (isomer shift of -11.43 mm/s at... (More)
- A well crystallized sample of EuAti(2)Ge(2) was synthesized by arc-melting of the elements. The structure was refined on the basis of single crystal X-ray diffractometer data: ThCr2Si2 type, 14/mmm, a = 447.3(1), c = 1034.0(4) pm, wR2 = 0.0575, 148 F-2 values and 9 variables. The gold atoms have tetrahedral germanium coordination (261 pm Au-Ge). These AuGe4/4 tetrahedra share four common edges, leading to layers which are connected via Ge-Ge bonds (247 pm). The europium atoms fill cages of coordination number 16 within the [Au2Ge2](delta-) polyanion. Temperature dependent susceptibility measurements show a magnetic moment of 7.79(1)mu(B)/formula unit. Together with the Eu-151 Mossbauer spectroscopic data (isomer shift of -11.43 mm/s at 77K), the magnetic data point to stable divalent europium. EuAu2Ge2 orders antiferromagnetically at T-N1 = 5.5(1) K, followed by a spin-reorientation at T-N2 = 3.5 K. A metamagnetic step occurs around 20 kOe in the 4 K magnetization isotherm. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1964163
- author
- Schellenberg, Inga ; Hermes, Wilfried LU ; Lidin, Sven LU and Poettgen, Rainer
- organization
- publishing date
- 2011
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Intermetallics, Europium, Mossbauer spectroscopy, Antiferromagnetic, transition
- in
- Zeitschrift für Kristallographie
- volume
- 226
- issue
- 3
- pages
- 214 - 218
- publisher
- Oldenbourg Verlag
- external identifiers
-
- wos:000289863800003
- scopus:79952571656
- ISSN
- 0044-2968
- DOI
- 10.1524/zkri.2011.1317
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Polymer and Materials Chemistry (LTH) (011001041)
- id
- f61c7745-f96f-4378-8170-e70ef5c6a038 (old id 1964163)
- date added to LUP
- 2016-04-01 14:26:08
- date last changed
- 2022-01-28 00:35:23
@article{f61c7745-f96f-4378-8170-e70ef5c6a038, abstract = {{A well crystallized sample of EuAti(2)Ge(2) was synthesized by arc-melting of the elements. The structure was refined on the basis of single crystal X-ray diffractometer data: ThCr2Si2 type, 14/mmm, a = 447.3(1), c = 1034.0(4) pm, wR2 = 0.0575, 148 F-2 values and 9 variables. The gold atoms have tetrahedral germanium coordination (261 pm Au-Ge). These AuGe4/4 tetrahedra share four common edges, leading to layers which are connected via Ge-Ge bonds (247 pm). The europium atoms fill cages of coordination number 16 within the [Au2Ge2](delta-) polyanion. Temperature dependent susceptibility measurements show a magnetic moment of 7.79(1)mu(B)/formula unit. Together with the Eu-151 Mossbauer spectroscopic data (isomer shift of -11.43 mm/s at 77K), the magnetic data point to stable divalent europium. EuAu2Ge2 orders antiferromagnetically at T-N1 = 5.5(1) K, followed by a spin-reorientation at T-N2 = 3.5 K. A metamagnetic step occurs around 20 kOe in the 4 K magnetization isotherm.}}, author = {{Schellenberg, Inga and Hermes, Wilfried and Lidin, Sven and Poettgen, Rainer}}, issn = {{0044-2968}}, keywords = {{Intermetallics; Europium; Mossbauer spectroscopy; Antiferromagnetic; transition}}, language = {{eng}}, number = {{3}}, pages = {{214--218}}, publisher = {{Oldenbourg Verlag}}, series = {{Zeitschrift für Kristallographie}}, title = {{Structure and properties of the 5.5 K antiferromagnet EuAu2Ge2}}, url = {{http://dx.doi.org/10.1524/zkri.2011.1317}}, doi = {{10.1524/zkri.2011.1317}}, volume = {{226}}, year = {{2011}}, }