Magnetocrystalline Anisotropy and Crystal Fields in the Weak-Ferromagnet Ce_4Ni_3Pb_4(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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We report measurements of magnetization, magnetic susceptibility, specific heat, and neutron diffraction on a single crystal of the heavy fermion compound, Ce_4Ni_3Pb_4, crystallizing in a trigonal structure with two inequivalent Ce sites. In the paramagnetic state, the effect of crystal electric field (CEF) leads to the easy magnetization direction along the c-axis. Magnetic Bragg peaks develop below T_N=3.0K and are indexed with a propagation vector k=[0,1,1/2]. Below T_N, a spontaneous moment of 10^<-3>μB/Ce is observed only for B⊥c, while a metamagnetic transition is observed for B‖c at 1.3T. The small spontaneous moment in the c-plane is ascribed to the slight canting of the antiferromagnetically aligned moments from the c-axis. The inelastic neutron scattering spectrum is composed of four CEF excitations at 5.3,19,24, and 40meV. The peaks at 19 and 40meV have a rather large width of 10meV, which is three times larger than that of the others. The wide peaks are assigned to excitations from the ground state of one Ce site, the Kondo temperature of which is higher than that of the Ce ions in the other site.
- 社団法人日本物理学会の論文
- 2009-02-15
著者
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NISHI Masakazu
Institute for Solid State Physics, University of Tokyo
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高畠 敏郎
広大先端研
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Nishi Masakazu
Institute For Solid State Phrsics University Of Tokyo
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高畠 敏郎
Department Of Quantum Matter Adsm Hiroshima University:institute For Advanced Materials Research Hir
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TAKABATAKE Toshiro
Department of Quantum Matter,Graduate School of Advanced Science of Matter,Hiroshima University
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田山 孝
Institute For Solid State Physics University Of Tokyo
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Shimada Kenya
Hiroshima Univ. Hiroshima Jpn
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Shimada K.
広大放セ
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Shimada Kenya
Department Of Physics University Of Tokyo
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Shimada Kenya
Hiroshima Synchrotron Radiation Center Hiroshima University
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高畑 敏郎
広大院先端物質
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ISHIDA Akihiro
Department of Electrical and Electronic Engineering, Shizuoka University
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Takabatake Toshiro
Department Of Quantum Matter Adsm Hiroshima University:institute For Advanced Materials Research Hir
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Takabatake Toshirou
Department Of Quantum Matter Adsm Hiroshima University
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TOGASHI Tadashi
RIKEN SPring-8
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SHIGETOH Keisuke
Department of Quantum Matter, AdSM, Hiroshima University
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ONIMARU Takahiro
Department of Quantum Matter, AdSM, Hiroshima University
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AKITA Motoko
Faculty of Science, Hiroshima University
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INOUE Katsuya
Faculty of Science, Hiroshima University
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SATO Taku
Institute for Solid State Physics, University of Tokyo
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ADROJA Devashibhai
ISIS Facility, Rutherford Appleton Laboratory
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Onimaru Takahiro
Department Of Quantum Matter Adsm Hiroshima University
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Ishida Akihiro
Department Of Quantum Matter Adsm Hiroshima University
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Adroja Devashibhai
Isis Facility Rutherford Appleton Laboratory
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Takabatake Toshiro
Department Of Quantum Matter Adsm Hiroshima University
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Shigetoh Keisuke
Department Of Quantum Matter Adsm Hiroshima University
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Akita Motoko
Faculty Of Science Hiroshima University
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Sugiyama K
Graduate School Of Science Osaka University:center For Quantum Science And Technology Under Extreme
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高畠 敏郎
広大院先端物質:広大先進セ
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Takabatake T
Hiroshima Univ. Higashi-hiroshima Jpn
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Takabatake Toshiro
Department Of Quantum Matters Adsm Hiroshima University
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Ishida Akihiro
Department Of Applied Physics The National Defense Academy
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Takabatake Toshiro
Hiroshima Univ. Hiroshima
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Sato Taku
Institute For Solid State Physics University Of Tokyo
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Sato Taku
Institute For Solid State Physics The University Of Tokyo
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Onimaru Takahiro
Institute For Solid State Physics University Of Tokyo:(present Office)department Of Quantum Matter A
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Inoue Katsuya
Faculty Of Science Hiroshima University:institute For Advanced Materials Research Hiroshima Universi
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