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  Structural and thermodynamic properties of Fe1.12Te with multiple phase transitions

Cherjan, D., Rößler, S., Koz, C., Tsirlin, A. A., Schwarz, U., Wirth, S., et al. (2014). Structural and thermodynamic properties of Fe1.12Te with multiple phase transitions. Journal of Applied Physics, 115(12): 123912, pp. 1-6. doi:10.1063/1.4870233.

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Cherjan, Dona1, Autor
Rößler, S.2, Autor           
Koz, C.3, Autor           
Tsirlin, A. A.3, Autor           
Schwarz, U.4, Autor           
Wirth, S.5, Autor           
Elizabeth, Suja1, Autor
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
3Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              
4Ulrich Schwarz, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863423              
5Steffen Wirth, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863460              

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 Zusammenfassung: The parent compound of iron chalcogenide superconductors, Fe1+yTe, with a range of excess Fe concentrations exhibits intriguing structural and magnetic properties. Here, the interplay of magnetic and structural properties of Fe1.12Te single crystals have been probed by low-temperature synchrotron X-ray powder diffraction, magnetization, and specific heat measurements. Thermodynamic measurements reveal two distinct phase transitions, considered unique to samples possessing excess Fe content in the range of 0.11 <= y <= 0.13. On cooling, an antiferromagnetic transition, T-N approximate to 57K is observed. A closer examination of powder diffraction data suggests that the transition at TN is not purely magnetic, but accompanied by the commencement of a structural phase transition from tetragonal to orthorhombic symmetry. This is followed by a second prominent first-order structural transition at T-S with T-S < T-N, where an onset of monoclinic distortion is observed. The results point to a strong magneto-structural coupling in this material. (C) 2014 AIP Publishing LLC.

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 Datum: 2014-03-28
 Publikationsstatus: Erschienen
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 Identifikatoren: DOI: 10.1063/1.4870233
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Titel: Journal of Applied Physics
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: New York, NY : American Institute of Physics
Seiten: - Band / Heft: 115 (12) Artikelnummer: 123912 Start- / Endseite: 1 - 6 Identifikator: ISSN: 0021-8979
CoNE: https://pure.mpg.de/cone/journals/resource/991042723401880