• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Control of the Orbital Degrees of Freedem by the Magnetic Field and Pressure

Research Project

Project/Area Number 11220206
Research Category

Grant-in-Aid for Scientific Research on Priority Areas (B)

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionHiroshima University

Principal Investigator

SERA Masafumi  HIROSHIMA UNIV., ADV. MAT. SCI., PROFESSOR, 大学院・先端物質科学研究科, 教授 (40196978)

Co-Investigator(Kenkyū-buntansha) IGA Fumitoshi  HIROOSHIMA UNIV., ADV. MAT. SCI., ASSOCIATE PROFESSOR, 大学院・先端物質科学研究科, 助教授 (60192473)
SUZUKI Takashi  HIROSHIMA UNIV., ADV. MAT. SCI., PROFESSOR, 大学院・先端物質科学研究科, 教授 (00192617)
小島 健一  広島大学, 総合科学部, 助教授 (00100975)
Project Period (FY) 1999 – 2001
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥48,100,000 (Direct Cost: ¥48,100,000)
Fiscal Year 2001: ¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 2000: ¥8,700,000 (Direct Cost: ¥8,700,000)
Fiscal Year 1999: ¥36,900,000 (Direct Cost: ¥36,900,000)
KeywordsORBITAL ORDER / MAGNETIC ORDER / QUADRUPOLE MOMENT / OCTUPOLE MOMENT / KONDO EFFECT / fELECTRONS / dELECTRJONS / CONTROLE by EXTERNAL FIELDS / 軌道自由度 / 多重極モーメント / 多重極子モーメント / 多極子秩序 / 八極子相互作用 / 四重極応答 / 電局・スピン・軌道結合 / 3d・4f電子 / 少数キャリアー強磁性
Research Abstract

This project has revealed the following new aspects on the orbital degrees of freedom in the 3d, 4f and 5f electron systems. We have shown that the origin of the unusual properties of CeB_6 showing thel antiferro-quadrupolar ordering at low temperatures and low magnetic fields is the coexistence and competition between the three interactions of the quadrupolar, octupolar and exchange. We have investigated the magnetic doping effect on the multipolar ordering in CeB_6 by using the Ce_xR_<1-x>B_6(R=Pr, Nd, Gd) systems and obtained the different affects between Pr and Nd ions with both spin and quadrupolar moments and Gd ion with only spin degrees of freedom. We have investigated the magnetic ion doping effect on the Kondo effect in CeB6 we found the extremely small interaction between Ce and Nd ions in Ce_xNd_<1-x>B_6 system. In order to clarify the origin of the weak ferromagnetism in Ca_<1-x>La_xB_6, we have investigated the Yb_<1-x>La_xB_6 system and found that this system exhibits the weak ferromagnetism at T_c=200K which is difficult to ascribe to the Fe impurity effect. As for the Kondo insulator system, we have investigated the Yb_<1-x>Lu_xB_<12> system and proposed the following model. Lu ion doping does not change the energy gay size of 200K but forms the in-gap state at the Fermi level and finally the usual Kondo effect becomes to be seen. As for the 3d electron system, we have investigated the Y_<1-x>Ca_xTiO_3 system. The origin of the metal-insulator transition at x=0.4 reported before has been ascribed to the phase separation between the insulating and metallic phases with different crystal structures. As for the 5f electron system, we have studied Ucu_2Sn exhibiting the long range order whose order parameter has not known by investigating the magnetoelastic properties and found that the ferro-quadrupolar order takes place.

Report

(4 results)
  • 2002 Final Research Report Summary
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • Research Products

    (56 results)

All Other

All Publications (56 results)

  • [Publications] S.Kobayashi, Y.Yoshino, S.Tsuji, M.Sera, F.Iga: "Kondo Effect in the Long-Range Antiferromagnetic Ordered State -Ce_xNd_<1-x>B_6-"J. Phys. Soc. Jpn.. 72. 25-28 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] F.Iga, Y.Ueda, T.Takabatake, T.Suzuki, W.Higemoto, K.Nishiyama, H.Kawanaka: "Evidence for a fenomagnetic transition in Yb_<1-x>La_xB_6(0<x<0.006)"Phys. Rev. B. 65. 220408R-1-220408R-4 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M.Sera, H.Ichikawa, T.Yokoo, J.Akimitsu, M.Nishi, K.Kakurai, S.Kunii: "Anomalous Temperature Dependence of Magnetic Field Induced Antiferromagnetic Moment in the Antiferroquadrupolar Ordered State of CeB_6"Phys. Rev. Lett.. 86. 1578-1581 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T.Muranaka, J.Akimitsu, M.Sera: "Thermal transport properties of MgB_2"Phys. Rev. B. 64. 020505-020507(R) (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T.Suzuki, I.Ishii, N.Okuda, K.Katoh, T.Takabatake, T.Fujita, A.Tamaki: "Quadrupolar ordering of 5f electrons in UCu_2Sn"Phys. Rev. B. 62. 49-52 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M.Sera, S.Kobayashi: "Magnetic Properties of the antiferro(AF) quadrupolar ordered state dominated by the AF octupolar and AF exchange interactions -A Simple Model for CeB_6-"J. Phys. Soc. Jpn.. 68. 1664-1678 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 藤田敏三, 児玉隆夫, 世良正文, 坪田 誠: "低温の物性物理"講談社サイエンティフィク. 204 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] S. Kobayashi, Y. Yoshino, S. Tsuji, M. Sera, F. Iga: "Kondo Effect in the Long-Range Antiferromagnetic Ordered State。スCe_xNd_<1-x>B_6。ス"J. Phys. Soc. Jpn.. 72. 25-28 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] F. Iga, Y. Ueda, T. Takabatake, T. Suzuki: "Evidence for a ferromagnetc transition in Yb_<1-x>La_xB_6(0<x<0.006)"Phys. Rev. B. 65. 220408R,1-4 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M. Sera, H. Ichikawa, T. Yokoo, J. Akimitsu, M. Nishi, K. Kakurai, S. Kunii: "Anomalous Temperature Dependence of Magnetic field Induced Antiferromagnetic Moment in the Antiferroquadrupolar Orderd State of CeB_6"Phys.Rev.Lett.. 86. 1578-1581 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T. Muranaka, J. Akimitsu, and M. Sera: "The mal transport properties of MgB_2"Phys. Rev. B. 64. 020505-020507R (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T. Suzuki, I. Ishii, N. Okuda, K. Katoh, T. Takabatake, T. Fujita and A. Tamaki: "Quadrupolar ordering of 5f electrons in Ucu_2Sn"Phys. Rev. B. 62. 49-52 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M. Sera, and S. Kobayashi: "Magnetic Properties of the autiferro(AF) quadrupolar ordered state dominated by the AF octupolar and AF exchange interactions。ンA。。Simple Mbdel for CeB_6。ン"J. Phys.Soc. Jpn.. 68. 1664-1678 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T. Fujita, T. Kodama, M. Sera, and M. Tsubota: "Condensed matter physics at low temperatures"Kodansya Scientific. 204 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T.Muranaka: "Thermal transport properties of MgB 2"Phys.Rev.B. 64. 020502-020507(R) (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] S.Tsuji: "Analysis of^<11>B-NMR in Phase II of CeB_6"J.Phys.Soc.Jpn.. 70. 41-44 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] M.Sera: "Anomalous Temperature Dependence of the Magnetic Field Induced Antiferro-Magnetic Moment in the Antiferro-Quadrupolar Ordered State of CeB_6"Phys.Rev.Lett.. 86. 1578-1581 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] S.Kobayashi: "Anisotropic Magnetic Phase Diagram of PrB_6 dominated by the O_<xy> Antiferro-quadrupolar Interaction"J.Phys.Soc.Jpn.. 70. 1721-1730 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] S.Tsuji: "Analysis of^<11> B-NMR in the antiferromagnetic phase III of CeB_6"J.Phys.Soc.Jpn.. 70. 2864-2867 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Nagata: "Antiferromagnetic Ordering in spin-ladder compound ; Sr_<14-x>Ca_xCu_<24>O_<41>"J.Phys.Soc.Jpn.. 71. 2419-2424 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] M.Matsumura: "Cu-NQR study for static spin-charge stripe order in La_<2-x-y>Sr_xY_yCuO_4with x=1/8"Physica C. 357-360. 89-92 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] H.Takagiwa: "Magnetic Properties in Phase IV of Ce_<0.7>La_<0.3>B_6 and Ce_<0.8>Nd_<0.2>B 6 probed by Muon Spin Relaxation"J.Phys.Soc.Jpn.. 71. 31-34 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] N.Okuda: "Unconventional strain dependence of superconductivity in spin-triplet superconductor Sr_2CuO_4"J.Phys.Soc.Jpn.. 71. (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Suzuki: "Elastic anomaly of UCu_2Sn in the magnetic fields"J.Magn.and Magn.Mat.. 226-230. 983-984 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] K.Prokes: "Magnetic structure of a UniAl single crystal"J.Magn.and Magn.Mat.. 226-230. 1186-1187 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] F.Iga: "Thermoelectric properties of the Kondo semiconductor : Yb_<1-x>Lu_xB_<12>"J.Magn.and Magn.Mat.. 226-230. 85-86 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] M.Sera: "Anomalous Temperature Dependence of the Magnetic Field Induced Antiferro-Magnetic Moment in the AFQ ordered State of CeB_6"Phys.Rev.Lett.. 86・8. 1578-1581 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] S.Tsuji: "Analysis of ^<11>B-NMR in Phase II of CeB_6"J.Phys.Soc.Jpn.. 70・1. 41-44 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] S.Kobayashi: "Transport Properties in Pase IV of Ce_xLa_<1-x>B_6"J.Phys.Soc.Jpn. 69・4. 926-936 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] M.Sera: "Elastic Constants of CeB_6"J.Phys.Soc.Jpn. 69・8. 2299-2304 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] M.Hiroi: "Magnetic phase diagram od CsCuCl_3 studied by specific heat measurements"Physica B. 284-288. 1605-1606 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] M.Hiroi: "Study on CuGe_<0.9885>Si_<0.0115>O_3"Physica B. 281-282. 669-670 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] S.Kobayashi: "Transport Properties in phase IV of Ce_xLa_<1-x>B_6"Physica B. 281-282. 557-558 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Y.Uwatoko: "Effect of Pressure on the antiferro-quadrupolar transition in CeB_6"Physica B. 281-282. 555-556 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] T.Yoshino: "High-field susceptibility of kondo semimetals CeNiSn and CeRhSb"Physica B. 281-282. 291-293 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 世良正文: "軌道自由度のもたらす奇妙な相転移-CeB_6を例として-"固体物理. 35・4. 229-242 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Fukuda: "Substitution Effect on the Unstable Ferromagnet CeFe_2"Physica B. 281-282. 92-93 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] T.Suzuki: "Jahn-Teller Instability in a Ternary Uranium Compound"Phusica B. 284-288. 1301-1302 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] R.Suzuki: "Quadrupolar ordering of 5f electrons in UCu_2Sn"Phys.Rev.B. 62・1. 49-52 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] S.Hiura: "High-field magnetization and magnetoresistance of single crystal Yb_<1-x>Lu_xB_<12> (x<1/4)"Physica B. 281-282. 271-273 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] K.Ikushima: "^<171>Yb NMR in the Kondo semiconductor YbB_<12>"Physica B. 281-282. 274-275 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] T.Ekino: "Energy gap in Lu-substituted YbB_<12> probed by break junction"Physica B. 281-282. 278-279 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Okamura: "Energy gap evolution in the optical spectra of Kondo alloy system Yb_<1-x>Lu_xB_<12>"Physica B. 281-282. 280-281 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] T.Susaki: "Photoemission study of Kond insulator YbB_<12>"Physica B. 281-282. 282-283 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] M.H.Jung: "Strong depression of the magnetic ordering temperature in CeSb by Ni incorporation"281-282. 443-444 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] M.Arita: "High-resolution temperature dependent photoemission study of metal-insulator transition of Y_<1-x>Ca_xTiO_3"Physica B. 281-282. 617-618 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] M.Tsubota: "Low-field anisotropy in Mott-insulating ferromagnet Y_<1-x>Ca_xTiO_3 (x<0.1)"Physica B. 281-282. 622-624 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] M.H.Jung: "Anisotropic Transport and Magnetic Properties and Magnetic-Polaron-like Behavior in CeTe_<2-x>"J.Phys.Soc.Jpn.. 69・3. 937-944 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Okamura: "Optical conductivity of Yb_<1-x>Lu_xB_<12> Energy gap and mid-infrared peak in dilute Kondo semiconductor"Phys.Rev.B. 62・20. R13265-R13269 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 高畠敏郎: "希土類近藤半導体の物性"まてりあ. 39・1. 937-944 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 世良正文(共著): "低温の物性物理"講談社サイエンティフィク. 214 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] S.Kobayashi: "Transport Properties in Phase VI of Ce_xLa_<1-x>B_6"Journal of the Physical Society of Japan. 69・3. 926-936 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] T.Suzuki: "Quadrupolar ordering of 5f electrons in UCu_2Sn"Phys.Rev.B. 61・21. (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] T.Suzuki: "Jahn-Teller instability in a ternary uranium compound"Physica B. 284-288. (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] M.Tsubota: "Low-field Magnetic anisotropy in Mott-insulating Ferromagnet Y_<1-x>Ca_xTiO_3(x<0.1)"Physica B. 284-288. (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 世良正文: "軌道自由度がもたらす奇妙な相転移"固体物理. 35・4. 229-242 (2000)

    • Related Report
      1999 Annual Research Report

URL: 

Published: 1999-04-01   Modified: 2018-03-28  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi