TY - JOUR
T1 - Pressure and substitution effects on transport and magnetic properties of Y1-xRxCo2 systems with static magnetic disorder
AU - Takeda, Masataka
AU - Teruya, Atsushi
AU - Watanabe, Shintaro
AU - Hirakawa, Sentaro
AU - Hiranaka, Yuichi
AU - Nakamura, Ai
AU - Takaesu, Yoshinao
AU - Uchima, Kiyoharu
AU - Hedo, Masato
AU - Nakama, Takao
AU - Yagasaki, Katsuma
AU - Matsubayashi, Kazuyuki
AU - Uwatoko, Yoshiya
AU - Burkov, Alexander T.
N1 - Copyright:
Copyright 2013 Elsevier B.V., All rights reserved.
PY - 2013/1
Y1 - 2013/1
N2 - The electrical resistivity and thermopower of light- and heavy-rare-earth-based pseudo-binary Y1-xRxCo2 (R = Nd, Gd, and Tb) alloys are measured at temperatures from 2 to 300K under pressures up to 3.5 GPa. The resistivity and thermopower of Y 1-xRxCo2 show unusual large variations with atomic substitution and pressure in the range of x < xm, where an inhomogeneous magnetization of the Co 3d electron subsystem is observed. These results indicate that the low-temperature transport properties of Y 1-xNdxCo2, as well as of Y1-xR HxCo2 (RH = heavy rare earth) alloys, are related to conduction electron scattering due to the static magnetic disorder in the itinerant Co 3d electron subsystem. We found that there is a universal relationship between d ln TC/dP and x/xm in Y1-xRxCo2 alloys, where xm is the boundary composition, which separates the alloy phase diagram into regions with uniform and nonuniform magnetizations of the Co-3d electron subsystem.
AB - The electrical resistivity and thermopower of light- and heavy-rare-earth-based pseudo-binary Y1-xRxCo2 (R = Nd, Gd, and Tb) alloys are measured at temperatures from 2 to 300K under pressures up to 3.5 GPa. The resistivity and thermopower of Y 1-xRxCo2 show unusual large variations with atomic substitution and pressure in the range of x < xm, where an inhomogeneous magnetization of the Co 3d electron subsystem is observed. These results indicate that the low-temperature transport properties of Y 1-xNdxCo2, as well as of Y1-xR HxCo2 (RH = heavy rare earth) alloys, are related to conduction electron scattering due to the static magnetic disorder in the itinerant Co 3d electron subsystem. We found that there is a universal relationship between d ln TC/dP and x/xm in Y1-xRxCo2 alloys, where xm is the boundary composition, which separates the alloy phase diagram into regions with uniform and nonuniform magnetizations of the Co-3d electron subsystem.
KW - Curie temperature
KW - Laves phase
KW - Pressure effect
KW - Resistivity
KW - Substitution effect
KW - Thermopower
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U2 - 10.7566/JPSJ.82.014708
DO - 10.7566/JPSJ.82.014708
M3 - Article
AN - SCOPUS:84871750639
VL - 82
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 1
M1 - 014708
ER -