Magnetocrystalline Anisotropy and Crystal Fields in the Weak-Ferromagnet Ce<SUB>4</SUB>Ni<SUB>3</SUB>Pb<SUB>4</SUB>

• Shigetoh Keisuke

  Department of Quantum Matter, AdSM, Hiroshima University

• Onimaru Takahiro

  Department of Quantum Matter, AdSM, Hiroshima University

• Ishida Akihiro

  Department of Quantum Matter, AdSM, Hiroshima University

• Akita Motoko

  Faculty of Science, Hiroshima University

• Inoue Katsuya

  Faculty of Science, Hiroshima University Institute for Advanced Materials Research, Hiroshima University

• Nishi Masakazu

  Institute for Solid State Physics, University of Tokyo

• Sato Taku J.

  Institute for Solid State Physics, University of Tokyo

• Adroja Devashibhai T.

  ISIS Facility, Rutherford Appleton Laboratory

• Takabatake Toshiro

  Department of Quantum Matter, AdSM, Hiroshima University Institute for Advanced Materials Research, Hiroshima University

Bibliographic Information

Other Title

• Magnetocrystalline anisotropy and crystal fields in the weak-ferromagnet Ce4Ni3Pb4

Abstract

We report measurements of magnetization, magnetic susceptibility, specific heat, and neutron diffraction on a single crystal of the heavy fermion compound, Ce₄Ni₃Pb₄, 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=3.0 K and are indexed with a propagation vector k=[0,1,1⁄2]. Below T_N, a spontaneous moment of 10⁻³ μ_B/Ce is observed only for B⊥c, while a metamagnetic transition is observed for B||c at 1.3 T. 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 40 meV. The peaks at 19 and 40 meV have a rather large width of 10 meV, 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.

Journal

• Journal of the Physical Society of Japan

  Journal of the Physical Society of Japan 78 (2), 024701-024701, 2009

  THE PHYSICAL SOCIETY OF JAPAN

Keywords

• Ce<SUB>4</SUB>Ni<SUB>3</SUB>Pb<SUB>4</SUB>
• heavy fermion
• weak ferromagnetism
• crystal electric field effect
• magnetic properties
• neutron diffraction

Details

• CRID: 1390282679172976512
• NII Article ID: 130005437278
• NII Article ID: 110007097877
• NII Article ID: 210000107668
• NII Book ID: AA00704814
• DOI: 10.1143/jpsj.78.024701
• ISSN: 13474073
• ISSN: 00319015
• NDL BIB ID: 9800305
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9800305
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.78.024701
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed