TY - JOUR
T1 - Magnetic properties of structure-disordered heavy fermion Ce-Mn alloys
AU - Amakai, Yusuke
AU - Murayama, Shigeyuki
AU - Obi, Yoshihisa
AU - Takano, Hideaki
AU - Momono, Naoki
AU - Takanashi, Koki
PY - 2010
Y1 - 2010
N2 - We have measured the magnetic susceptibility χ on structure-disordered CexY80-xMn20 alloys from 2 to 280 K. The χ shows a typical Curie-Weiss (CW) paramagnetic behavior above 20 K in each concentration x. In the Ce-poor region of x ≤ 51, the low-temperature χ below 15 K exhibits a spin-glass transition. The spin-glass transition temperature Tg decreases with increasing Ce-concentration. In the Ce-rich region of x ≥ 62, the spin-glass transition disappears and the CW paramagnetic behavior remains down to the low temperature limit. The Weiss temperature θ is negative for all the samples and almost constant in the Ce-poor side. However, the absolute value of θ increases with increasing Ce-concentration in the Ce-rich region. We have interpreted this fact as an increase of the antiferromagnetic c-f coupling, namely the Kondo effect, with the Ce-concentration.
AB - We have measured the magnetic susceptibility χ on structure-disordered CexY80-xMn20 alloys from 2 to 280 K. The χ shows a typical Curie-Weiss (CW) paramagnetic behavior above 20 K in each concentration x. In the Ce-poor region of x ≤ 51, the low-temperature χ below 15 K exhibits a spin-glass transition. The spin-glass transition temperature Tg decreases with increasing Ce-concentration. In the Ce-rich region of x ≥ 62, the spin-glass transition disappears and the CW paramagnetic behavior remains down to the low temperature limit. The Weiss temperature θ is negative for all the samples and almost constant in the Ce-poor side. However, the absolute value of θ increases with increasing Ce-concentration in the Ce-rich region. We have interpreted this fact as an increase of the antiferromagnetic c-f coupling, namely the Kondo effect, with the Ce-concentration.
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U2 - 10.1088/1742-6596/200/1/012006
DO - 10.1088/1742-6596/200/1/012006
M3 - Conference article
AN - SCOPUS:77957021836
VL - 200
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - SECTION 1
M1 - 012006
ER -