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High-pressure crystal growth furnace
The group applies a unique high-pressure traveling-solvent floating-zone furnace. The device offers growth conditions particularly devoted to Li-based single crystals where volatilization of Li is a major problem but may be suppressed by high external gas pressure. The device at U Heidelberg is the first which has been commercially delivered to academic research world-wide.
Relevant parameters of the high-pressure furnace
- Ar and O2 pressure up to 150 bar
- high pressure argon purification
- controlled gas flow
- oxygen-tight sealings
- pressure range down to 0.1 mbar
- in-situ temperature control
- growth speed 0.01 - 2000 mm/h
- rotation speed 0-150 rpm
- arc lamps 5 and 7 kW
- temperatures up to >2700 °C
The device has been funded by Deutsche Forschungsgemeinschaft within SPP 1473 WeNDeLIB (KL 1824/5-1)
Selected publications on single crystal growth (2010 - )
- Anisotropic ionic conductivity of LiMn1−xFexPO4 (0 ≤ x ≤ 1) single crystals
C.Neef, A.Reiser, E.Thauer, R.Klingeler, Solid State Ionics 346, 115197 (2020) - High-magnetic field phase diagram and failure of magnetic Grüneisen scaling in LiFePO4
J. Werner, S. Sauerland, C. Koo, C. Neef, A. Pollithy, Y. Skourski, R. Klingeler, Phys. Rev. B, 214432 (2019) - High-pressure optical floating-zone growth of Li2FeSiO4 single crystals
W. Hergett, C. Neef, H. Wadepohl, H.-P. Meyer, M.M. Abdel-Hafiez, C. Ritter, E. Thauer, R. Klingeler, J. Cryst. Growth 515, 37-43 (2019) - Synthesis and magnetism of a Li2FeSiO4 single crystal
W. Hergett, M. Jonak, J. Werner, F. Billert, S. Sauerland, C. Koo, C. Neef, R. Klingeler, J. Magn. Magn. Mat. 477, 1-3 (2019) - High-pressure optical floating-zone growth of Li(Mn,Fe)PO4 single crystals
C. Neef*, H. Wadepohl, H.-P. Meyer, R. Klingeler, J. Cryst. Growth 462, 50-59 (2017) - Single crystal growth of the ErPd2Si2 intermetallic compound
C. Cao, R. Klingeler, N. Leps, G. Behr, W. Löser, Journal of Crystal Growth 401, 601-604 (2014) - The effect of process parameters on floating zone crystal growth of selected cuprates
N. Wizent, N. Leps, G. Behr, R. Klingeler, B. Büchner, W. Löser, J. Cryst. Growth 401, 596-600 (2014) - Growth, characterization, and magnetic properties of a Li(Mn,Ni)PO4 single crystal
K. Wang, A. Maljuk, C. Blum, T. Kolb, C. Jähne, H.-J. Grafe, L. Giebeler, H.-P. Meyer, S. Wurmehl, R. Klingeler, Journal of Crystal Growth 386, 16-21 (2014) - Experimental evidence for the coupling of Li-motion and structural distortions in LiMnPO4
C. Rudisch, H.-J. Grafe, J. Geck, S. Partzsch, M. v. Zimmermann, N. Wizent, R. Klingeler, B. Büchner, Phys. Rev. B 88, 054303 (2013) - Self-flux growth of large EuCu2Si2 single crystals
C. Cao, W. Löser, G. Behr, R. Klingeler, N. Leps, H. Vinzelberg, B. Büchner, Journal of Crystal Growth 318, 1043-1047 (2011) - Single crystal growth of Eu2CuSi3 intermetallic compound by the floating zone method.
C. Cao, W. Löser, G. Behr, R. Klingeler, N. Leps, H. Vinzelberg, B. Büchner, Journal of Crystal Growth 318, 1009-1012 (2011) - Challenges in the crystal growth of Li2CuO2 and LiMnPO4
N. Wizent, G. Behr, W. Löser, B. Büchner, R. Klingeler, Journal of Crystal Growth 318 (2011) 995–999 - Single crystal growth and physical properties of superconducting ferro-pnictides Ba(Fe,Co)2As2 grown using self-flux and Bridgman techniques
S. Aswartham, C. Nacke, G. Friemel, N. Leps, S. Wurmehl, N. Wizent, C. Hess, R. Klingeler, G. Behr, S. Singh, B. Büchner, Journal of Crystal Growth 314 (2011) 341-348 - Effect of rotation of feed and seed rods on the quality of Na0.75CoO2 single crystal grown by traveling solvent floating zone method
C. Sekar, S. Paulraj, P. Kanchana, B. Schüpp-Niewa, R. Klingeler, G. Krabbes, B. Büchner, Materials Research Bulletin 46 (2011) 675-681 - Single crystal growth and characterization of superconducting LiFeAs
I. Morozov, A. Boltalin, O. Volkova, A. Vasiliev, O. Kataeva, U. Stockert, M. Abdel-Hafiez, D. Bombor, A. Bachmann, Harnage L., M. Fuchs, H.-J. Grafe, G. Behr, R. Klingeler, S. Borisenko, C. Hess, S. Wurmehl, B. Buechner., Crystal Growth and Design 10 (2010), 4429-4432 - Single-crystal growth of LiMnPO4 by the floating-zone method.
N. Wizent, G. Behr, F. Lipps, I. Hellmann, R. Klingeler, V. Kataev, W. Loeser, N. Sato, B. Büchner, Journal of Crystal Growth 311 (2009) 1273
Student's theses
- Züchtung und Strukturbestimmung von Mangantitanat
Marlen Bentner, Bachelorarbeit, 2018 - Einkristallzüchtung von Li2MSiO4
Hagen Schray, Masterarbeit, 2017 - Züchtung und Untersuchung von LiMPO4 und Li2MSiO4 (M = Mn, Fe, Co) Mikro- und Makrokristallen
Christoph Neef, Dissertation, 2016 - Synthese und magnetische Charakterisierung von Li2MSiO4 (M = Mn, Fe, Ni)
Kyril Batvinyeu, Masterarbeit, 2016
