Crystal growth and some properties of TM(Al1-x Mox)B4 synthesized by Al-Flux

Shigeru Okada, Kaoru Kouzu, Takashi Yamasaki, Takao Mori, Quansheng Guo, Toetsu Shishido, Kunio Yubuta, Gerda Rogl, Peter Rogl

Research output: Contribution to journalConference articlepeer-review

Abstract

Crystals of the solid solution Tm(Al1-xMox)B4 (x = 0.002-0.050) were grown from Tm2 O3, metal Mo and crystalline boron powders as starting materials under an Ar atmosphere at 1773 K for 5 h. Tm(Al1-xMox)B4 crystals were obtained as a single phase in the case of Al1-xMox flux (x = 0.005 and 0.010). Tm(Al1-xMox)B4 crystals at a maximum size of about 2.2 mm were obtained in the shape of a flake, and together with needle-like crystals of MoAlB and an unknown phase using Al0.970 Mo0.030 flux. The lattice constants of Tm(Al1-xMox)B4 (x = 0.005-0.010) crystals were determined to be larger compared to those obtained for TmAlB4 . This is related to the fact that the ionic radius of Mo is larger than the ionic radius of Al. When the Al position in the TmAlB4 structure was substituted with Mo having a large ionic radius, the hardness hardly changed. In contrast to TmAlB4, no antiferromagnetic transition could be observed for Tm(Al0.995 Mo0.005 )B4, indicating that the disorder introduced by Mo-doping disrupted the magnetic transition.

Original languageEnglish
Pages (from-to)65-70
Number of pages6
JournalSolid State Phenomena
Volume289
DOIs
Publication statusPublished - 2019
Event21st International Conference on Solid Compounds of Transition Elements, SCTE 2018 - Vienna, Austria
Duration: 2018 Mar 252018 Mar 29

Keywords

  • Al-self flux
  • Chemical analysis
  • Crystal growth of solid solution Tm(AlMo)B compound
  • Lattice constant
  • Magnetic susceptibility
  • Micro-Vickers hardness

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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