Neutron Scattering Study of Kondo Lattice Antiferromagnet YbNiSi3

The Kondo lattice antiferromagnet YbNiSi3 was investigated by neutron scattering techniques. The magnetic structure of YbNiSi3 was determined by neutron diffraction techniques on a single-crystalline sample. We revealed that the magnetic moments of Yb atoms align along the b-axis and are composed a...

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Bibliographic Details
Published in:Journal of the Physical Society of Japan 2008-12, Vol.77 (12)
Main Authors: KOBAYASHI, Yuha, ONIMARU, Takahiro, AVILA, Marcos A, SASAI, Kenzo, SODA, Minoru, HIROTA, Kazuma, TAKABATAKE, Toshiro
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties and materials
Magnetically ordered materials: other intrinsic properties
Physics
Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.)
Valence fluctuation, kondo lattice, and heavy-fermion phenomena
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Summary:The Kondo lattice antiferromagnet YbNiSi3 was investigated by neutron scattering techniques. The magnetic structure of YbNiSi3 was determined by neutron diffraction techniques on a single-crystalline sample. We revealed that the magnetic moments of Yb atoms align along the b-axis and are composed a ferromagnetic bc plane stacking antiferromagnetically along the a-axis. Inelastic neutron scattering experiments were also performed on a pulverized sample to study the crystalline electric field (CEF) excitations. Two broad CEF excitations were observed, from which we propose a plausible CEF model. The temperature dependences of the magnetic susceptibility χ and the magnetic specific heat Cmag were calculated using the probable CEF parameters, and compared with previous results.
ISSN:0031-9015
1347-4073
DOI:10.1143/jpsj.77.124701