Transport Properties of Ce_2Co_7B_3 in Magnetic Field(Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties)
スポンサーリンク
概要
- 論文の詳細を見る
Thermopower S, resistivity ρ and magnetization M of Ce_2Co_7B_3 have been measured in magnetic fields up to 15T at temperature range from 2 to 1000K. The magnetic field dependence of S(H) and ρ(H) changes drastically at spin-flop critical field H_s=6.0T in 4.2K. A very large negative magnetoresistance is observed, 35% in 15T at 4.0K, suggesting large spin-spin interaction between s and d electrons. Magnetic phase transitions in temperature and field are experimentally obtained, a magnetic phase diagram is established. The S(T) measured up to 1000K suggests that a DOS peak exists at 250K apart from Fermi level (ε_F) in energy. Below H_s, a negative peak exists on the S(T) curve around 20K, which disappears suddenly at H_s. The negative peak is estimated coming from a super-zone boundary on ε-k curve caused by anti-ferromagnetic periodicity. The DOS below and above H_s have been estimated from experimental S(T) in terms of Mott's two band s-d scattering model.
- 社団法人日本物理学会の論文
- 2006-04-15
著者
-
UWATOKO Yoshiya
Institute for Solid State Physics, The University of Tokyo
-
仲間 隆男
琉球大理
-
矢ヶ崎 克馬
琉球大理
-
NAKAMA Takao
Faculty of Science, University of the Ryukyus
-
YAGASAKI Katsuma
Faculty of Science, University of the Ryukyus
-
IDO Hideaki
Department of Applied Physics and Informatics, Faculty of Engineering, Tohoku Gakuin University
-
HEDO Masato
Institute for Solid State Physics, University of Tokyo
-
Hedo Masato
Institute For Solid State Physics (issp) The University Of Tokyo
-
Ido Hideaki
Department Of Applied Physics And Informatics Faculty Of Engineering Tohoku Gakuin University
-
NOTSU Shikou
Faculty of Science, University of the Ryukyus
-
SHIMOJI Yuko
Faculty of Science, University of the Ryukyus
-
Uwatoko Yoshiya
Institute For Solid State Physics (issp) The University Of Tokyo
-
Shimoji Yuko
Faculty Of Science University Of The Ryukyus
-
Notsu Shikou
Faculty Of Science University Of The Ryukyus
-
HEDO Masato
Institute of Solid State Physics, University of Tokyo
-
IDO Hideaki
Department of Applied Physics, Tohoku Gakuin University
-
Uwatoko Yoshiya
Institute for Solid State Physics
関連論文
- 20aPS-56 ホイスラー型合金Fe_2Mn_Al_の磁化と輸送特性(20aPS 領域3ポスターセッション(薄膜・人工格子・表面・微小領域・スピントロニクス・遍歴・化合物磁性),領域3(磁性,磁気共鳴))
- 20aPS-43 Nd_Tb_xCo_2の磁性と熱電能(20aPS 領域3ポスターセッション(薄膜・人工格子・表面・微小領域・スピントロニクス・遍歴・化合物磁性),領域3(磁性,磁気共鳴))
- Electrical, Thermal and Magnetic Properties of CeNiIn_4 (Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties)
- Pressure-Induced Commensurate Magnetic Order in Multiferroic HoMn_2O_5(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
- Investigation of the Structure of Single Crystal Sr_3Ru_2O_7 by Neutron and Convergent Beam Electron Diffractions (Condensed Matter: Structure, Mechanical and Thermal Properties)
- 27pPSB-20 ホイスラー型合金Fe_V_xAlの磁場中の電気抵抗と熱電能(領域3ポスターセッション : 遷移金属化合物)(領域3)
- 21pPSA-58 ホイスラー合金 Fe_V_xAl の電気抵抗と熱電能
- 25aPS-82 EuCo_2P_2の圧力誘起価数転移(領域8ポスターセッション(f電子系等),領域8,強相関系:高温超伝導,強相関f電子系など)
- 25pPSA-48 Nd_Tb_xCo_2の磁性と輸送特性(領域3ポスターセッション(スピントロニクス・遍歴磁性等),領域3,磁性,磁気共鳴)
- 25pPSA-47 ホイスラー型合金Fe_2Mn_Al_の輸送特性(領域3ポスターセッション(スピントロニクス・遍歴磁性等),領域3,磁性,磁気共鳴)