Crystal growth and physical properties of lu(Al1-x tx )b4 (t = fe, cr) by al-self flux

Kaoru Kouzu, Takashi Yamasaki, Shigeru Okada, Takao Mori, Quansheng Guo, Toetsu Shishido, Kunio Yubuta, Akiko Nomura, Akira Yoshikawa, Peter Rogl

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


Crystals of the quaternary compounds α-Lu(Al1-xTx)B4 (T = Fe, Cr) (YCrB4-type, orthorhombic, Pbam), obtained from the nominal composition of Lu(Al1-xTx)B3, were grown by using Al flux mixed with T metal at 1773 K for 5 h under an Ar atmosphere. The maximum dimensions and morphology of the crystals obtained were about 0.7 mm × 0.5 mm for flake-type crystals of Lu(Al1-xCrx)B4 and about 5.2 mm × 0.2 mm for prism crystals of Lu(Al1-xFex)B4 . The lattice constants determination and chemical analyses of Lu(Al1-xTx)B4 (T = Fe, Cr) compounds were carried out for Fe 0.5-10.0 at% and Cr 0.5-1.0 at%. The lattice constants and the unit lattice volume in Lu(Al1-xTx)B4 crystals decreased with increase of the concentration of Fe or Cr. The values of micro-Vickers hardness of Lu(Al1-xFex)B4 (x = 0.005-0.030) and Lu(Al1-xCrx)B4 (x = 0.005-0.010) samples are in the ranges of 16(2)-20(3) GPa and 13(2)-16(3) GPa, respectively. The hardness values showed a little increase as the solid solution of Fe or Cr was realized in Lu(Al1-xTx)B4, possibly because of distortion to the crystal structure. The magnetic susceptibility of as-grown Lu(Al0.995 Fe0.005 )B4 crystals for example, exhibited diamagnetic behavior with a small ferromagnetic component.

Original languageEnglish
Title of host publicationSolid Compounds of Transition Elements III
EditorsErnst Bauer, Herbert Müller, Daniel Fruchart, Herwig Michor
PublisherTrans Tech Publications Ltd
Number of pages7
ISBN (Print)9783035713022
Publication statusPublished - 2019
Event21st International Conference on Solid Compounds of Transition Elements, SCTE 2018 - Vienna, Austria
Duration: 2018 Mar 252018 Mar 29

Publication series

NameSolid State Phenomena
Volume289 SSP
ISSN (Print)1012-0394
ISSN (Electronic)1662-9779


Conference21st International Conference on Solid Compounds of Transition Elements, SCTE 2018


  • Al-self flux
  • Cr) compound
  • Crystal growth of Lu(AlT)B (T = Fe
  • 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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