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  Effect of Co and Ni substitution on the two magnetostructural phase transitions in Fe1.12Te

Koz, C., Rößler, S., Tsirlin, A. A., Zor, C., Armağan, G., Wirth, S., et al. (2016). Effect of Co and Ni substitution on the two magnetostructural phase transitions in Fe1.12Te. Physical Review B, 93(2): 024504, pp. 1-12. doi:10.1103/PhysRevB.93.024504.

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 Creators:
Koz, Cevriye1, Author           
Rößler, S.2, Author           
Tsirlin, Alexander A.1, Author           
Zor, Ceren3, Author           
Armağan, Gerçek1, Author           
Wirth, Steffen4, Author           
Schwarz, Ulrich5, Author           
Affiliations:
1Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              
2Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
3Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
4Steffen Wirth, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863460              
5Ulrich Schwarz, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863423              

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 Abstract: Here we present the results of high-resolution x-ray diffraction experiments along with specific heat, resistivity, and magnetization measurements of chemically well-characterized Fe1.12-xMx Te (M = Co, Ni) samples. The motivation is to investigate how the two coupled magnetostructural phase transitions in the antiferromagnetic parent compound Fe1.12Te of chalcogenide superconductors can be tuned. While the two-step magnetostructural transition (tetragonal-to-orthorhombic followed by orthorhombic-to-monoclinic) persists in Fe1.10Co0.02Te, only one, tetragonal-to-orthorhombic transition was observed in Fe1.10Ni0.02Te. Upon increasing the Co and Ni substitution, the structural phase transitions and the long-range magnetic order are systematically suppressed without any sign of superconductivity. For high substitution levels (x >= 0.05), a spin-glass-like behavior was observed and the low-temperature structure remains tetragonal. From our results, it can be inferred that the electron doping strongly suppresses the magnetostructural phase transitions.

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Language(s): eng - English
 Dates: 2016-01-062016-01-06
 Publication Status: Issued
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 93 (2) Sequence Number: 024504 Start / End Page: 1 - 12 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008