TY - JOUR
T1 - Crystal growth and some properties of TM(Al1-x Mox)B4 synthesized by Al-Flux
AU - Okada, Shigeru
AU - Kouzu, Kaoru
AU - Yamasaki, Takashi
AU - Mori, Takao
AU - Guo, Quansheng
AU - Shishido, Toetsu
AU - Yubuta, Kunio
AU - Rogl, Gerda
AU - Rogl, Peter
N1 - Funding Information:
The authors thank Ms. Yoko Imai of Kanagawa University and Prof. Ai Momozawa, Ms. Emi Shindou, and Prof. Akira Yoshida of Tokyo City University for their help in the experiments. TM thanks CREST JPMJCR 15Q6 and JSPS KAKENHI JP17H02749, JP16H06441.
Publisher Copyright:
© 2019 Trans Tech Publications Ltd, Switzerland. All rights reserved.
PY - 2019
Y1 - 2019
N2 - 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.
AB - 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.
KW - Al-self flux
KW - Chemical analysis
KW - Crystal growth of solid solution Tm(AlMo)B compound
KW - Lattice constant
KW - Magnetic susceptibility
KW - Micro-Vickers hardness
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U2 - 10.4028/www.scientific.net/SSP.289.65
DO - 10.4028/www.scientific.net/SSP.289.65
M3 - Conference article
AN - SCOPUS:85091286469
SN - 1012-0394
VL - 289
SP - 65
EP - 70
JO - Solid State Phenomena
JF - Solid State Phenomena
T2 - 21st International Conference on Solid Compounds of Transition Elements, SCTE 2018
Y2 - 25 March 2018 through 29 March 2018
ER -