TY - GEN
T1 - Crystal growth and physical properties of lu(Al1-x tx )b4 (t = fe, cr) by al-self flux
AU - Kouzu, Kaoru
AU - Yamasaki, Takashi
AU - Okada, Shigeru
AU - Mori, Takao
AU - Guo, Quansheng
AU - Shishido, Toetsu
AU - Yubuta, Kunio
AU - Nomura, Akiko
AU - Yoshikawa, Akira
AU - Rogl, Peter
N1 - Funding Information:
The authors thank Ms. Yoko Imai of Kanagawa University for their help in the experiments. TM thanks CREST JPMJCR15Q6 and JSPS KAKENHI JP17H02749, JP16H06441.
PY - 2019
Y1 - 2019
N2 - 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.
AB - 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.
KW - Al-self flux
KW - Cr) compound
KW - Crystal growth of Lu(AlT)B (T = Fe
KW - Magnetic susceptibility
KW - Micro-Vickers hardness
UR - http://www.scopus.com/inward/record.url?scp=85067790257&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85067790257&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/SSP.289.120
DO - 10.4028/www.scientific.net/SSP.289.120
M3 - Conference contribution
AN - SCOPUS:85067790257
SN - 9783035713022
T3 - Solid State Phenomena
SP - 120
EP - 126
BT - Solid Compounds of Transition Elements III
A2 - Bauer, Ernst
A2 - Müller, Herbert
A2 - Fruchart, Daniel
A2 - Michor, Herwig
PB - Trans Tech Publications Ltd
T2 - 21st International Conference on Solid Compounds of Transition Elements, SCTE 2018
Y2 - 25 March 2018 through 29 March 2018
ER -