Optical floating zone growth of high-quality Cu 2MnAl single crystals

A. Neubauer, F. Jonietz, M. Meven, R. Georgii, G. Brandl, G. Behr, P. Böni, C. Pfleiderer

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

We report the growth of large single-crystals of Cu 2MnAl, a ferromagnetic Heusler compound suitable for polarizing neutron monochromators, by means of optical floating zone under ultra-high vacuum compatible conditions. Unlike Bridgman or Czochralsky grown Cu 2MnAl, our floating zone grown single-crystals show highly reproducible magnetic properties and an excellent crystal quality with a narrow and homogeneous mosaic spread as examined by neutron diffraction. An investigation of the polarizing properties in neutron scattering suggests a high polarization efficiency, limited by the relatively small sample dimensions studied. Our study identifies optical floating zone under ultra-high vacuum compatible conditions as a highly reproducible method to grow high-quality single-crystals of Cu 2MnAl.

Keywords

  • Mosaicity
  • Optical floating zone
  • Polarized neutron scattering
  • Polarizing monochromator
  • Single crystal growth

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