Magnetic and Thermoelectric Properties of Ce_2NiB_<10-δ> (δ ≅ 0.3), a Ni-incorporated Variant of CeB_6

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概要

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• Magnetic susceptibility, electrical resistivity, thermopower, spectfic heat, and thermal conductivity measurements were made on Ce_2NiB_<10-δ>. The crystal structure is derived from that of CeB_6 by replacing two B atoms in the B_6-B_6 network with one Ni atom. The sample prepared by arc melting is deficient in the boron composition, δ ≅ 0.3. The magnetic susceptibility, electrical resistivity, and specific heat show no sign of magnetic ordering down to 0.5 K, but exhibit non-Fermi liquid (NFL) behavior, i e, X ∝ -T^<0.5>, p ∝ T and C/T ∝ - In T. This behavior of C(T) in zero field and its suppression by external magnetic fields are explained qualitatively by the Kondo disorder model with the average Kondo temperature of 26 K. Atomic disorder induced by boron defects is the most probable origin of the NFL behavior. The thermal conductivity of Ce_2NiB_<9.7> is much reduced from that for CeB_6, which is ascribed to the increase of phonon scattering by the lattice defect.

• 社団法人日本物理学会の論文
• 2003-09-15

著者

• 世良 正文

  Department Of Quantum Matter Graduate School Of Advanced Sciences Of Matter Hiroshima University

• SERA Masafumi

  Department of Quantum Matter, AdSM, Hiroshima University

• MATSUOKA Eiichi

  Department of Physics, Graduate School of Science, Tohoku University

• IGA Fumitoshi

  Department of Quantum Matter, ADSM, Hiroshima University

• TAKABATAKE Toshiro

  Department of Quantum Matter,Graduate School of Advanced Science of Matter,Hiroshima University

• Sera Masafumi

  Department Of Physics Tohoku University:institute For Molecular Science

• Sera M

  Department Of Quantum Matter Graduate School Of Advanced Sciences Of Matter Hiroshima University

• Sera M

  Department Of Quantum Matter Adsm Hiroshima University

• Sera Masafumi

  Department Of Physics Nagoya University

• Sera Masafumi

  Department Of Physics Faculty Of Science Nagoya University

• Tsutsui Satoshi

  Department Of Materials Science And Technology Iwate University

• Takabatake T

  Hiroshima Univ. Hiroshima

• Takabatake Toshirou

  Department Of Quantum Matter Adsm Hiroshima University

• UMEO Kazunori

  Department of Quamtam Matter, ADSM, Hiroshima University

• TSUJI Shigenari

  Department of Quantum Matter, ADSM, Hiroshima University

• UMEO Kazunori

  Cryogenics and Instrumental Analysis Division, N-BARD, Hiroshima University

• Iga Fumitoshi

  Hiroshima Univ. Hiroshima Jpn

• Iga Fumitoshi

  Department Of Quantum Matters Adsm Hiroshima University

• Iga Fumitoshi

  Department Of Physics Tohoku University

• TSUJI Shigenori

  Department of Quantum Matter, ADSM, Hiroshima University

• Takabatake Toshiro

  Department Of Quantum Matter Adsm Hiroshima University

• Tsuji Shigenori

  Cryogenic Center Hiroshima University

• Susaki Tomofumi

  Department Of Physics And Department Of Complexity Science And Engineering University Of Tokyo:(pres

• Matsuoka Eiichi

  Department Of Physics Graduate School Of Science Tohoku University

• Matsuoka E

  Department Of Quantum Matter Adsm Hiroshima University:(present Address)department Of Physics Gradua

• Matsuoka Eiichi

  Department Of Quantum Matter Adsm Hiroshima University

• Umeo K

  Department Of Quantum Matter Graduate School Of Advanced Sciences Of Matter Hiroshima University:cry

• Sawada M

  Hiroshima Synchrotron Radiation Center Hiroshima University

• Tsuji S

  Department Of Quantum Matter Adsm Hiroshima University

• Sera M

  Institute Of Materials Structure Science High Energy Accelerator Research Organization (kek)

• Umeo K

  Cryogenics And Instrumental Analysis Division N-bard Hiroshima University

• Iga F

  Graduate School Of Science And Technology Niigata University

• Iga Fumitoshi

  Dpartmeot Of Quantum Matter Adsm Hiroshima University

• Iga Fumitoshi

  Hiroshima Univ. Higashihiroshima

• Iga F

  Department Of Quantum Matter Adsm Hiroshima University

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