High-pressure optical floating-zone growth of Li(Mn,Fe)PO4 single crystals
Mm-sized LiMn1−xFexPO4 single crystals with 0⩽x⩽1 were grown by means of the traveling floating-zone technique at elevated Argon pressure of 30bar. For the various doping levels, the growth process was optimized with respect to the composition-dependant effective light absorption and transparency of...
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| Main Authors: | , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
27 January 2017
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| In: |
Journal of crystal growth
Year: 2017, Volume: 462, Pages: 50-59 |
| DOI: | 10.1016/j.jcrysgro.2017.01.046 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1016/j.jcrysgro.2017.01.046 Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S002202481730060X 
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| Author Notes: | Christoph Neef, Hubert Wadepohl, Hans-Peter Meyer, Rüdiger Klingeler |
| Summary: | Mm-sized LiMn1−xFexPO4 single crystals with 0⩽x⩽1 were grown by means of the traveling floating-zone technique at elevated Argon pressure of 30bar. For the various doping levels, the growth process was optimized with respect to the composition-dependant effective light absorption and transparency of the materials. A convex crystal/melt interface, determined by the angle of incident light, was identified to be particularly crucial for a successful growth. The resulting large single crystalline grains are stoichiometric. Structure refinement shows that lattice parameters as well as the atomic positions and bond lengths linearly depend on the Mn:Fe-ratio. Oriented cuboidal samples with several mm3 of volume were used for magnetic studies which imply an antiferromagnetic ground state for all compositions. The Néel-temperature changes from TN=32.5(5)K in LiMnPO4 to 49.5(5)K in LiFePO4 while the easy magnetic axis in the ordered phase flips from the crystallographic a- to the b-axis upon Fe-doping of x<0.2. |
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| Item Description: | Die Zahl "4" ist im Titel tiefgestellt Gesehen am 28.03.2018 |
| Physical Description: | Online Resource |
| DOI: | 10.1016/j.jcrysgro.2017.01.046 |