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Rare-earth (RE) nanolaminates Mo4RE4Al7C3 featuring ferromagnetism and mixed-valence states
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- Tao, Quanzheng (author)
- Linköpings universitet,Tunnfilmsfysik,Tekniska fakulteten
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- Ouisse, T. (author)
- Univ Grenoble Alpes, France
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- Pinek, D. (author)
- Univ Grenoble Alpes, France
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- AMER PHYSICAL SOC, 2018
- 2018
- English.
- In: Physical Review Materials. - : AMER PHYSICAL SOC. - 2475-9953. ; 2:11
- Journal article (peer-reviewed)
Abstract
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- Rare-earth-based (RE) nanolaminates have attracted attention recently because of their complicated magnetism and their potential as precursors for strongly correlated two-dimensional materials. In this work, we synthesized a class of nanolaminates with a Mo4RE4Al7C3 chemistry, where RE = Ce or Pr. Powder samples of both phases were characterized with respect to structure and composition. Single crystals of Mo4Ce4Al7C3 were used for magnetization measurements. The crystal structure was investigated by means of x-ray diffraction and scanning transmission electron microscopy. Magnetization analysis reveals a ferromagnetic ground state with a Curie temperature of similar to 10.5 K. X-ray absorption near-edge structure provides experimental evidence that Ce is in a mixed-valence state. X-ray magnetic circular dichroism shows that only the Ce atoms with 4f(1) configuration occupying one of the two possible sites are ferromagnetically coupled, with a saturation moment of similar to 1.2 mu(B) per atom. We thus classify Mo4Ce4Al7C3 as a ferromagnetic, mixed-valence compound.
Subject headings
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
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- ref (subject category)
- art (subject category)
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- Tao, Quanzheng
- Ouisse, T.
- Pinek, D.
- Chaix-Pluchery, ...
- Wilhelm, F.
- Rogalev, A.
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- Opagiste, C.
- Jouffret, L.
- Champagne, A.
- Charlier, J-C
- Lu, Jun
- Hultman, Lars
- Barsoum, M. W.
- Rosén, Johanna
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- Linköping University
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