TY - JOUR
T1 - Syntheses and properties of Yb(Al1-xTx)B4 (T = Cr, Fe) compounds
AU - Kouzu, Kaoru
AU - Yamasaki, Takashi
AU - Okada, Shigeru
AU - Mori, Takao
AU - Guo, Quansheng
AU - Yubuta, Kunio
AU - Nomura, Akiko
AU - Shishido, Toetsu
AU - Yoshikawa, Akira
AU - Rogl, Peter
N1 - Funding Information:
Tadashi Nishihara of Kokushikan University, Ms. Yoko Imai of Kanagawa University and Dr. Gerda Rogl of Institute of Materials Chemistry, University of Vienna for their help in the experiments. KY was partly supported by JSPS KAKENHI grant number JP19K05643.
Funding Information:
The authors thank Dr. Hamed Mofidi Tabatabaei and Prof. Tadashi Nishihara of Kokushikan University, Ms. Yoko Imai of Kanagawa University and Dr. Gerda Rogl of Institute of Materials Chemistry, University of Vienna for their help in the experiments. KY was partly supported by JSPS KAKENHI grant number JP19K05643.
Publisher Copyright:
© 2019 Japan Society of Powder and Powder Metallurgy.
PY - 2019
Y1 - 2019
N2 - Crystals of new compounds α-Yb(Al1-xTx)B4 (orthorhombic, space group Pbam) (T = Fe, x = 0∼0.100; T = Cr, x = 0∼0.015) with YCrB4-type were grown from Yb2O3, metal Fe or Cr and crystalline boron powders under an Ar atmosphere at 1773 K for 5 h. The obtained Yb(Al1-xTx)B4 crystals were measured for hardness and magnetic susceptibility. The values of micro-Vickers hardness for Yb(Al1-xFex)B4 and Yb(Al1-xCrx)B4 were in the range of 15.7(1.5)∼16.8(1.5) GPa, and 13.3(2.7)∼14.8(1.5) GPa, respectively. It is presumed that this difference is due to the difference in the size of the atomic radius of Fe or Cr. The magnetic susceptibility of Yb(Al0.995Fe0.005)B4 shows a sharp paramagnetic increase at low temperatures, likely due to impurities or defects.
AB - Crystals of new compounds α-Yb(Al1-xTx)B4 (orthorhombic, space group Pbam) (T = Fe, x = 0∼0.100; T = Cr, x = 0∼0.015) with YCrB4-type were grown from Yb2O3, metal Fe or Cr and crystalline boron powders under an Ar atmosphere at 1773 K for 5 h. The obtained Yb(Al1-xTx)B4 crystals were measured for hardness and magnetic susceptibility. The values of micro-Vickers hardness for Yb(Al1-xFex)B4 and Yb(Al1-xCrx)B4 were in the range of 15.7(1.5)∼16.8(1.5) GPa, and 13.3(2.7)∼14.8(1.5) GPa, respectively. It is presumed that this difference is due to the difference in the size of the atomic radius of Fe or Cr. The magnetic susceptibility of Yb(Al0.995Fe0.005)B4 shows a sharp paramagnetic increase at low temperatures, likely due to impurities or defects.
KW - Al-self flux
KW - Chemical analysis
KW - Lattice constant
KW - Magnetic susceptibility
KW - Micro-Vickers hardness
KW - Solid solutions Yb(AlT)B (T = Fe, Cr)
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U2 - 10.2497/jjspm.66.525
DO - 10.2497/jjspm.66.525
M3 - Article
AN - SCOPUS:85075102771
SN - 0532-8799
VL - 66
SP - 525
EP - 529
JO - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
JF - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
IS - 11
ER -