Magnetostriction Measurements to Clarify High-Temperature Phase Boundary in CeOs<sub>4</sub>Sb<sub>12</sub>

POSTER

Abstract

The filled skutterudite compound CeOs4Sb12 displays Kondo insulating behavior with accompanied by a ~1 K antiferromagnetic (AFM)/ Spin-Density-Wave (SDW) order state. In penetration depth and magnetic susceptibility measurements, we found a Fermi-surface reconstruction in CeOs4Sb12 and an unusual phase boundary in the temperature T vs magnetic field H diagram associated with the valence transition from the Ce4+ to Ce3+ state. However, the phase boundary between 5 and 15 K, currently described by the susceptibility data, is hard to define. Since a valence transition can strongly influence the electron-phonon coupling, we performed additional magnetostriction measurements to clarify this intriguing phase boundary.

*Research at CSU-Fresno is supported by NSF DMR-1506677; at UCSD by NSF DMR-1206553 and US DOE DEFG02-04ER46105; at Hokkaido U. by JSPS KAKENHI 26400342, 15K05882, and 15K21732. Work performed at the National High Magnetic Field Laboratory, USA, was supported by NSF Cooperative Agreement DMR-1157490, the

Presenters

  • Pei-Chun Ho

    • Physics, California State University, Fresno
    • Department of Physics, California State University, Fresno

Authors

  • Pei-Chun Ho

    • Physics, California State University, Fresno
    • Department of Physics, California State University, Fresno

  • Marcelo Jaime

    • Los Alamos Natl Lab
    • National High Magnetic Field Laboratory, Los Alamos National Laboratory
    • Los Alamos National Laboratory
    • National High Magnetic Field Laboratory
    • NHMFL, LANL

  • John Singleton

    • Los Alamos Natl Lab
    • Los Alamos National Laboratory
    • National High Magnetic Field Laboratory, Los Alamos National Laboratory
    • Los Alamos National Lab NHMFL
    • NHMFL-LANL
    • NHMFL at Los Alamos National Lab
    • NHMFL, Los Alamos Natl Lab
    • NHMFL - Los Alamos

  • M Brian Maple

    • Department of Physics, University of California, San Diego
    • University of California, San Diego
    • Physics, University of California, San Diego
    • Univ of California - San Diego
    • Department of Physics and Center for Advanced Nanoscience, University of California, San Diego
    • Department of Physics, Center for Advanced Nanoscience,Materials Science and Engineering Program , Univ of California - San Diego
    • Department of Physics, University of California San Diego
    • Physics, Univ of California - San Diego
    • University of California-San Diego
    • UC San Diego
    • Physics, UC San Diego

  • Tatsuya Yanagisawa

    • Physics, Hokkaido University