Magnetic Instability around the Quantum Critical Point in CeCoGe_<3-x>Si_x(0≤x≤3)(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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We have studied Kondo effect and quantum critical behavior in the pseudoternary system of CeCoGe<3-x>Si_x by measuring the electrical resistivity, magnetic susceptibility, and specific heat at low temperatures down to 0.05K. Substitution of silicon for germanium generates normal chemical pressure and enhances the exchange interaction. Antiferromagnetism disappears around x〜1.2 and non-Fermi liquid-like behavior is seen, T^<3/2> or T dependence in ρ(T), depending on the temperature range and - lnT in C/T. The resistivity was also measured in magnetic fields of up to 6T and found to recover Fermi liquid behavior in magnetic fields.
- 2006-09-15
著者
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Eom Duhwa
Institute For Solid State Physics University Of Tokyo
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ISHIKAWA Masayasu
Institute for Solid State Physics, University of Tokyo
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TAKEDA Naoya
Institute for Solid State Physics, University of Tokyo
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Ishikawa M
Univ. Tsukuba Ibaraki
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Ishikawa Y
Toshiba Research And Development Center Kawasaki
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Ishikawa M
Univ. Tokyo Osaka
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Ishikawa M
Institute For Solid State Physics University Of Tokyo
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Ishikawa Masayasu
Institute For Solid State Physics The University Of Tokyo
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Iino Masaaki
The Institute For Solid State Physics The University Of Tokyo
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Takeda N
Institute For Solid State Physics University Of Tokyo
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Takeda Naoya
Institute For Solid State Physics University Of Tohyo
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