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Ultra-high vacuum compatible induction-heated rod casting furnace.
Bauer, A; Neubauer, A; Münzer, W; Regnat, A; Benka, G; Meven, M; Pedersen, B; Pfleiderer, C.
Afiliação
  • Bauer A; Physik-Department, Technische Universität München, D-85748 Garching, Germany.
  • Neubauer A; Physik-Department, Technische Universität München, D-85748 Garching, Germany.
  • Münzer W; Physik-Department, Technische Universität München, D-85748 Garching, Germany.
  • Regnat A; Physik-Department, Technische Universität München, D-85748 Garching, Germany.
  • Benka G; Physik-Department, Technische Universität München, D-85748 Garching, Germany.
  • Meven M; Institut für Kristallographie, RWTH Aachen and Jülich Centre for Neutron Science at MLZ, D-85748 Garching, Germany.
  • Pedersen B; Heinz Maier-Leibnitz Zentrum (MLZ), D-85748 Garching, Germany.
  • Pfleiderer C; Physik-Department, Technische Universität München, D-85748 Garching, Germany.
Rev Sci Instrum ; 87(6): 063909, 2016 Jun.
Article em En | MEDLINE | ID: mdl-27370472
We report the design of a radio-frequency induction-heated rod casting furnace that permits the preparation of polycrystalline ingots of intermetallic compounds under ultra-high vacuum compatible conditions. The central part of the system is a bespoke water-cooled Hukin crucible supporting a casting mold. Depending on the choice of the mold, typical rods have a diameter between 6 mm and 10 mm and a length up to 90 mm, suitable for single-crystal growth by means of float-zoning. The setup is all-metal sealed and may be baked out. We find that the resulting ultra-high vacuum represents an important precondition for processing compounds with high vapor pressures under a high-purity argon atmosphere up to 3 bars. Using the rod casting furnace, we succeeded to prepare large high-quality single crystals of two half-Heusler compounds, namely, the itinerant antiferromagnet CuMnSb and the half-metallic ferromagnet NiMnSb.

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2016 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2016 Tipo de documento: Article