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1996 Fiscal Year Final Research Report Summary

"A Series of Experimental Studies on Phase Transitions, Photo-Disclosed Ordered States, Dynamics of Superconductive-Conjugate Optical Phenomena in Oxide Systems"

Research Project

Project/Area Number 06402023
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied materials science/Crystal engineering
Research InstitutionGUNMA UNIVERSITY

Principal Investigator

MASUMI Taizo  Gunma University, Department of Electronic Engineering, Professor, 工学部, 教授 (20012304)

Co-Investigator(Kenkyū-buntansha) YAMAGUCHI Hiroyuki  Gunma University, Department of Electronic Engineering, Research Associate, 工学部, 助手 (80261866)
MINAMI Hidetoshi  University of Tsukuba, Institute of Applied Physics, Lectuer, 物理工学系, 講師 (00190702)
ITOH Fumitake  Gunma University, Department of Electronic Engineering, Professor, 工学部, 教授 (60005907)
Project Period (FY) 1994 – 1996
KeywordsOxides Insulators / Phase transitions / Photoconductivity with anomalies / Superconductive-conjugate characters / Superconductive optoelectronic devices
Research Abstract

1.Refining by Floating Zone Technique and Evaluation of Oxide Materials ; High-purity specimens of Cu_2O and CuO have been studied as the basic substances towards the Cu-O network in the Cuprate superconductive Oxides by spectrochemical analysis, X-ray diffraction, optical absorption, photoluminescence, and Raman scattering. These results revealed remakably new results both on Cu_2O and especially on CuO.
2.A Trial Study of Phase Transition in Insulating Oxides by using the Anomalous Compton Scattering ; We have tried to pursue a potential existence of phase transitions of the valence electronic system in Cu_2O via studying the temperature dependence (T=15-300K) of the momentum distribution and spin polarization in the anomalous Compton scattering. Unfortunately, clear results have not been obtained because of lack of machine time available in the Synchrotron Oribit Radiation (SOR) Facilities in the High Energy Physics Laboratory (KEK).
3.Studies of the Correlation between Phase Transiti … More ons and Occurrences of Anomalies in Photoconductivity ; With a wider view than ever, we extended our studies on the correlation between phase transitions and occurrences of anomalies in photoconductivity by studying the temperature dependence of pulsed photoconductivity in various substance, especially unexpectedly emerging photosignals with decreasing temperature in details, at wider electric and magnetic fields, wavelength and intensity of photoexcitation. Particularly, besides Cu_2O,we have extended studies to cover CuO,Sm_2CuO_4, etc.and obtained results remarkably similar to those in Cu_2O.We are approaching the Cu-O based superconductors by photodoping.
4.Nonlinear Photomagnetism-Optical-Microwave Cyclotrone Double Resonance ; We have investigated intensively the nonlinear optical-microwave double cyclotron resonance of Cu_2O due to polarons with excitons in details. Besides, on the problem of an existence of the mid-gap states in Cu_2O,we newly studied the temperature dependence of microwave photoconductivity signals between T=4.2K and 300K similar to pulsed photoconductivity signals in a view of dynamical aspects of photoresponses at 35GHz. We have observed a resonant enhancement of microwave photoconductivity at lambda=614nm and around T=60K.
5.Search for Superconductive-Conjugate Photoconductive Substance and Dynamics of Photoresponses ; We have examined the optical absorption, photoconductivity, photoluminescence of single or polycrystals and thin film of CuO,Sm_2CuO_4, etc.. and newly confirmed that CuO and Sm_2CuO_4 exhibit superconductive-conjugate photoconductivity. We have also studied the optical absorption of Ba_<1-x>K_xBiO_3 and light-irradiated effect on reduced Y-Ba_2-Cu_3-O_<7-delta>.
6.Basic Studies of Superconductive Optoelectronic Devices ; By adopting a combination of the Cu-O based high-Tc Superconductor pairs and the insulator Cu_2O of superconductive-conjugate photoconductivity, we have pursued a possibility to build a superconductive optoelectronic device and of their application. In a basic aspect, we discovered a resonant shift of temperature dependence of photoconductivity of Cu_2O at the gate region with the occurrence of superconductive transitions of the Y-Ba-Cu-O,La-Sr-Cu-O,or La-Ba-Cu-O at the source and drain regions. In an aspect for applications, we confirmed a possibility of basic operation as a photo-transistor including three terminal FET-like arrangements. These results reveal a possibility to develop an integrated array of photoelectric devices at high density and high speed operations. Less

  • Research Products

    (48 results)

All Other

All Publications (48 results)

  • [Publications] Taizo Masumi: ""PHOTOCONDUCTIVITY WITH ANOMALIES IN INSULATORS CORRELATED WITH HIGH-T_C SUPERCONDUCTIVITY"(Invited Review)" Phase Transitions. 51. 127-174 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Taizo Masumi and Masakatsu Isobe: ""BASIC PRINCIPLES OF SUPERCONDUCTIVE OPTOELECTRONIC DEVICES"(Invited)" Proc.22nd Int.Conf.Phys.Semiconductors.3. 2633-2640 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Taizo Masumi: ""Novel emergences and anomalies of photoconductivity in insulators correlative with high-Tc superconductivity"(Invited)" Proc.SPIE-The International Society for Optical Engineering,Oxide Superconductor Physics and Nano-Engineering. 2158. 158-169 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hiroshi Amekura and Taizo Masumi: "" Reconfirmation with Discussion of Anomalies in Photoconductivity of Cu_2O at Low Temperatures "" J.Phys.Soc.Jpn.64. 2684-2696 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Taizo Masumi and Masakatsu Isobe: ""Novel Concepts of Superconductive Optoelectronic Devices : Resonances of Photoconductivity in the Cu_2O Gate Region "(Invited)" Proc.SPIE-The International Society for Optical Engineering,Oxide Superconductor Physics and Nano-Engineering II. 2697. 539-550 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Masakatsu Isobe and Taizo Masumi: ""Default of the Resonant Conjugation o Photoconductivity of Cu_2O in Low-Tc Superconductor Based Optoelectronic Devices"" J.Phys.Soc.Jpn.65. 4088-4089 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] E.Zukosaki,M.J.Cooper,D.N.Timms R.Armstring,Eltoh,H.Sakurai,Y.Tanaka,M.Ito,H.Kawata,and R.Bateson: "" Temperature Dependence of the Magnetic Compton Profile of Ferrimagnetic HoFe_2"" J.Phys.Soc.Jpn.63. 3835-3846 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] F.Itoh and H.Sakurai: ""Magnetic Compton Profiles of Transition Metals Alloy System"(Invited)" Extended Abstracts of "Workshop on Photon Neutron Studies of Magnetic Materials",Marathon,Greece,April 8-11,. 12 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Sakurai,F.Itoh,N.Sakai,Y.Tanaka and H.kawata: ""Magnetic Electron Momentum Distribution in Transition Metal Alloys"" Proc.1st Magneto-Electronics Int.Symp.,Nagano,Japan,Nov.9-11,. 57-60 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] P.K.Lawson,J.E.McCarthy,M.J.Cooper,E.Zukowaki,D.N.Timms,Fltoh,H.Sakurai,Y.Tanaka,H.Kawata,and M.Ito: ""Temperature Dependence of the Magnetic Compton Profile of Ferrimagnetic DyFe_2 and ErFe_2"" J.Phys.: Condents.Matter.7. 389-400 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Sakurai,F.Itoh,M.Ozaki,H.Kawata,M.Ito and S.Kishimoto: ""Time of Flight X-eX Spectroscopy"," Proc.2nd Int.Workshop.on Compton Scattering and Fermiology,28-31 August,Tokyo. 456-461

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] F.Itoh,T.Shiraishi,H.Sakurai,S.Takei,K.Hayama and H.Oike: ""Circular Magnatic X-ray Dichroism of Fe/Ho MultilayerFilms"." Proc.2nd Int.Symp.on Metallic Multilayers,11-14 September,Cambridge,UK,. 54. 110-111 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.J.Cooper,P.K.Lawson,M.A.G.Dixon,E.Zukosaki,D.N.Timms,F.Itoh,H.Sakurai,H.Sakurai,H.Kawata,Y.Tanaka,and M.Ito: ""Compton Scattering Study of 4f Magnetism in CeFe_2"," Phys.Rev.B. 54. 4056-4070 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.T.Kim,H.Uwe and H.Minami: ""Optical Measurement for Epitaxial Films of Ba_<1-x>Rb_xBiO_<3-d> Synthesized by Laser Ablation"" Adv.in Superconductivity. 4,. 191-194. (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Minami: "" Optical Absorption Spectra of BaBiO_3 in Wide Temperature Range "" Physica C. 235-240. 1151-1152 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Minami,M.Ishibashi,K.Oshima and H.Uwe: ""Effect of Light Irradiation on the Crystal Sructure and conductivity of Reduced YBa_2Cu_3O_<7-y>"" Proc.7th Int.Symp.Superconductivity. (in press),. (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Minami,M.Ishibashi,K.Oshima and H.Uwe: ""Effect of Light Irradiation on the Crystal Structure and conductivity of Reduced YBa_2Cu_3O_<7-y>"" Proc.7th Int.Symp.Superconductivity. 7. 141-144 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.T.Kim,H.Minami and H.Uwe: ""Temperature Dependence of Optical Spectra for the CDW Gap and Optical Phonons in BaBiO_3"" Proc.7th Int.Symp.Superconductivity. 7. 169-172 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Minami,T.Uzumaki,and H.Uwe: ""Characterization of Ba_<1-x>K_xBiO_<3-y> Synthesized by an Electrochemical Method with the Influence of Hear Treatment"" Proc.8th Int.Symp.Superconductivity,Advances of Superconductivity VIII.8. 429-432 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Uwe,Xiaoli Ji,and H.Minami: ""Magnetic Susceptibility of Single Crystalline Ba_<1-x>K_xBiO_<3-y>"" Czechoslovak J.Phys.,Proc.7th Int.Symp.Superconductivity. 46,7. 2691-2692,141-144 (1996,1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.T.Kim.H.Minami,W.Schmidtbauer.J.W.Hodby,Alyo,Elga and H.Uwe: ""Paramagnetic Meissner Effect in Superconducting Single Crystal of Ba_<1-x>K_xBiO_3"" J.Low Temp.Phys.105. 557-562 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Minami and H.Uwe: ""SIS Structure of Ba_<1-x>K_xBiO_3 Fabricated by an Electrochemical Method"" Proc.9th Int.Symp.Superconductiveity,Sapporo Advances in Superconductivity IX. (1996,1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Yamaguchi,S.Kagoshima,T.Masumi,J.Li,K.Kitazawa: ""Pulsed Photoconductivity in Single Crystals of C_<60> with Anomalies at Phase Transitions"" Proc.22nd Int.Conf.Phys.Semiconductors,. 3. 2097-2100 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Yamaguchi,T.Yamaguchi,S.Kagoshima,T.Masumi,J.Li,K.Kishio: ""Anomalies in the Pulsed Photoconductivity of Undopeed C_<60> and Their Relationship to Phase Transitions"" J.Phys.Soc.Jpn.64. 527-532 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Taizo Masumi: ""PHOTOCONDUCTIVITY WITH ANOMALIES IN INSULATORS CORRELATED WITH HIGH-T_c SUPERCONDUCTIVITY" (Invited Review)" Phase Transitions. Vol.51. 127-174 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Taizo Masumi and Masakatsu Isobe: ""BASIC PRINCIPLES OF SUPERCONDUCTIVE OPTOELECTRONIC DEVICES" (Invited)" Proc.22nd Int.Conf.Phys.Semiconductors. Vol.3. 2633-2640 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Taizo Masumi: ""Novel emergences and anomalies of photoconductivity in insulators correlative with high-Tc superconductivity" (Invited)" Proc.SPIE-The International Society for Optical Engineering, Oxide Superconductor Physics and Nano-Engineering. Vol.2158. 158-169 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hiroshi Amekura and Taizo Masumi: ""Reconfirmation with Discussion of Anomalies in Photoconductivity of Cu_2O at Low Temperatures"" J.Phys.Soc.Jpn.Vol.64. 2684-2696 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Taizo Masumi and Masakatsu Isobe: ""Novel Concepts of Superconductive Optoelectronic Devices : Resonances of Photoconductivity in the Cu_2O Gate Region" (Invited)" Proc.SPIE-The International Society for Optical Engineering, Oxide Superconductor Physics and Nano-Engineering II. Vol.2697. 539-550 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Masakatsu Isobe and Taizo Masumi: ""Default of the Resonant Conjugation of Photoconductivity of Cu_2O in Low-Tc Superconductor Based Optoelectronic Devices"" J.Phys.Soc.Jpn.Vol.65. 4088-4089 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] E.Zukowski, M.J.Cooper, D.N.Timms, R.Armstring, F.Itoh, H.Sakurai, Y.Tanaka, M.Ito, H.Kawata, and R.Bateson: ""Temperature Dependence of the Magnetic Compton Profile of Ferrimagnetic HoFe_2"" J.Phys.Soc.Jpn.Vol.63. 3835-3846 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] F.Itoh and H.Sakurai: ""Magnetic Compton Profiles of Transition Metals Alloy System" (Invited)" Extended Abstracts of "Workshop on Photon Neutron Studies of Magnetic Materials" , Marathon, Greece, April 8-11. 12 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Sakurai, F.Itoh, N.Sakai, Y.Tanaka and H.Kawata: ""Magnetic Electron Momentum Distribution in Transition Metal Alloys"" Proc.1st Magneto-Electronics Int.Symp., Nagano, Japan, Nov.9-11, (1994). 57-60 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] P.K.Lawson, J.E.McCarthy, M.J.Cooper, E.Zukowski, D.N.Timms, F.Itoh, H.Sakurai, Y.Tanaka, H.Kawata, and M.Ito: ""Temperature Dependence of the Magnetic Compton Profile of Ferrimagnetic DyFe_2 and ErFe_2"" J.Phys. : Condens. Matter. Vol.7. 389-400 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Sakurai, F.Itoh, M.Ozaki, H.Kawata, M.Ito and S.Kishimoto: ""Time of Flight X-eX Spectroscopy"" Proc.2nd Int.Workshop. on Compton Scattering and Fermiology, 28-31 August, 1995, Tokyo. 456-461

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] F.Itoh, T.Shiraishi, H.Sakurai, S.Takei, K.Hayama and H.Oike: ""Circular Magnatic X-ray Dichroism of Fe/Ho MultilayrFilms"" Proc.2nd Int.Symp.on Metallic Multilayrs, 11-14 September, 1995, Cambridge, UK. 110-111

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.J.Cooper, P.K.Lawson, M.A.G.Dixon, E.Zukowski, D.N.Timms, F.Itoh, H.Sakurai, H.Sakurai, H.Kawata, Y.Tanaka, and M.Ito: ""Compton Scattering Study of 4f Magnetism in CeFe_2"" Phys.Rev.B. Vol.54. 4056-4070 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.T.Kim, H.Uwe and H.Minami: ""Optical Measurement for Epitaxial Films of Ba_<1-x>Rb_xBiO_<3-d> Synthesized by Laser Ablation"" Adv.in Superconductivity. Vol.4. 191-194 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Minami: ""Optical Absorption Spectra of BaBiO_3 in Wide Temperature Range"" Physica C. Vol.235-240. 1151-1152 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Minami, M.Ishibashi, K.Oshima and H.Uwe: ""Effect of Light Irradiation on the Crystal Structure and conductivity of Reduced YBa_2Cu_3O_<7-y>"" Proc.7th Int.Symp.Superconductivity. (in press). (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Minami, M.Ishibashi, K.Oshima and H.Uwe: ""Effect of Light Irradiation on the Crystal Structure and conductivity of Reduced YBa_2Cu_3O_<7-y>"" Proc.7th Int.Symp.Superconductivity. Vol.7. 141-144 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.T.Kim, H.Minami and H.Uwe: ""Temperature Dependence of Optical Spectra for the CDW Gap and Optical Phonons in BaBiO_3"" Proc.7th Int.Symp.Superconductivity. Vol.7. 169-172 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Minami, T.Uzumaki, and H.Uwe: ""Characterization of Ba_<1-x>K_xBiO_<3-y> Synthesized by an Electrochemical Method with the Influence of Heat Treatment"" Proc.8th Int.Symp.Superconductivity, Advances of Superconductivity VIII. Vo.8. 429-432 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Uwe, Xiaoli Ji, and H.Minami: ""Magnetic Susceptibility of Single Crystalline Ba_<1-x>K_xBiO_<3-y>" Czechoslovak J.Phys., Proc, 7th Int.Symp.Superconductivity. Vol.46, Suppl. S5 Vol.7. 2691-2692,141-144 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.T.Kim, H.Minami, W.Schmidtbauer, J.W.Hodby, A Iyo, F.Iga and H.Uwe: ""Paramagnetic Meissner Effect in Superconducting Single Crystal of Ba_<1-x>K_xBiO_3"" J.Low Temp.Phys.Vol.105. 557-562 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Minami and H.Uwe: ""SIS Structure of Ba_<1-x>K_xBiO_3 Fabricated by an Electrochemical Method"" Proc.9th Int.Symp.Superconductiveity, Sapporo, 1996, Advances in Superconductivity IX. (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Yamaguchi S.Kagoshima, T.Masumi, J.Li, and K.Kitazawa: ""Pulsed Photoconductivity in Single Crystals of C_<60> with Anomalies at Phase Transitions"" Proc.22nd Int.Conf.Phys.Semiconductors. Vol.3. 2097-2100 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Yamaguchi, T.Yamaguchi, S.Kagoshima, T.Masumi, J.Li, and K.Kishio: ""Anomalies in the Pulsed Photoconductivity of Undopeed C_<60> and Their Relationship to Phase Transitions"" J.Phys.Soc.Jpn.Vol.64. 527-532 (1995)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-09  

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