Anomalous Electronic Behaviors in Ferromagnetic Kondo Lattice SmFe4P12

Daisuke Kikuchi; Hitoshi Sugawara; Kenya Tanaka; Hidekazu Aoki; Miki Kobayashi; Shotaro Sanada; Keitaro Kuwahara; Yuji Aoki; Hiroaki Shishido; Rikio Settai; Yoshichika Onuki; Hisatomo Harima; Hideyuki Sato

doi:10.1143/jpsj.77.114705

Anomalous Electronic Behaviors in Ferromagnetic Kondo Lattice SmFe₄P₁₂

Daisuke Kikuchi, Hitoshi Sugawara, Kenya Tanaka, Hidekazu Aoki, Miki Kobayashi, Shotaro Sanada, Keitaro Kuwahara, Yuji Aoki, Hiroaki Shishido, Rikio Settai, Yoshichika Onuki, Hisatomo Harima, Hideyuki Sato

Author information

Daisuke Kikuchi
Department of Physics, Tokyo Metropolitan University
Hitoshi Sugawara
Faculty of Integrated Arts and Sciences, The University of Tokushima
Kenya Tanaka
Department of Physics, Tokyo Metropolitan University
Hidekazu Aoki
Department of Physics, Tokyo Metropolitan University
Miki Kobayashi
Department of Physics, Tokyo Metropolitan University
Shotaro Sanada
Department of Physics, Tokyo Metropolitan University
Keitaro Kuwahara
Department of Physics, Tokyo Metropolitan University
Yuji Aoki
Department of Physics, Tokyo Metropolitan University
Hiroaki Shishido
Graduate School of Science, Osaka University
Rikio Settai
Graduate School of Science, Osaka University
Yoshichika Onuki
Graduate School of Science, Osaka University
Advanced Science Research Center, Japan Atomic Energy Research Institute
Hisatomo Harima
Department of Physics, Kobe University
Hideyuki Sato
Department of Physics, Tokyo Metropolitan University

Keywords: filled skutterudite, SmFe₄P₁₂, de Haas–van Alphen effect, transverse magnetoresistance, Hall effect, Fermi surface

JOURNAL RESTRICTED ACCESS

2008 Volume 77 Issue 11 Pages 114705

DOI https://doi.org/10.1143/jpsj.77.114705

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Abstract

The electronic properties in SmFe₄P₁₂ have been investigated by means of the de Haas–van Alphen effect, transverse magnetoresistance, Hall effect, and band structure calculation. We have found a markedly large anisotropy in the cyclotron effective mass of the 47th band Fermi surface despite its nearly spherical shape. Moreover, this mass enhancement in SmFe₄P₁₂ is robust against magnetic field. The transverse magnetoresistance increases nearly quadratically with magnetic field for all field directions; this is unexpected for an ordinary uncompensated metal. The Hall coefficient is found to be 4-fold enhanced at low temperature compared with that at room temperature. These anomalies in transport properties are ascribed to the stronger enhancement of the cyclotron effective mass of the 48th band Fermi surface.

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