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

1994 Fiscal Year Final Research Report Summary

Formation and Electromagnetic Properties of Large Single Crystals of Metal Hydrides

Research Project

Project/Area Number 05452095
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Applied materials science/Crystal engineering
Research InstitutionYokohama National University

Principal Investigator

YAMAGUCHI Masuhiro  Yokohama Nat.Univ., Dept.Eng.Professor, 工学部, 教授 (10018046)

Co-Investigator(Kenkyū-buntansha) GOTO Tsuneaki  Univ.Tokyo, ISSP,Professor, 物性研究所, 教授 (30005962)
YAMAMOTO Isao  Yokohama Nat.Univ., Dept.Eng.Assistant, 工学部, 助手 (40242383)
KAKUNO Keiichi  Yokohama Nat.Univ., Dept.Eng.Professor, 工学部, 教授 (40017918)
Project Period (FY) 1993 – 1994
KeywordsMetal hydride / Single crystal / Electrical resistivity / Magnetization / 磁化
Research Abstract

The present study was concerned with (1) the formation of well-defined and large single crystals of metal hydrides and (2) the investigation of electric and magnetic properties for these metal hydrides. We investigated the ternary metal hydrids based on rare-eath intermetallics, such as LaNi_5, LaCo_5, GdFe_3, Gd_6Fe_<23>, Mg_2Ni, NdCo_5, YCo_3, Y_6Fe_<23>.
The single crystals of the starting intermetallics were prepared by means of triarcmelting. Laue x-ray diffraction patterns showed that they were single crystals and the maximum size of them was 8mm d*20mm l.
We developed an in situ method to measure the electrical resistivity unstable hydrides (with high equilibrium hydrogen pressures). It was observed that Mg_2Ni transits from a metal to a semiconductor as a result of hydrogenation and the energy gap of Mg_2NiH_<3.1> is 0.056eV.
As hydrogen is absorbed in GdFe_3, the lattice constants is increased and the compensation temperature is decreased from 280K to 161K.Under the influence of high magnetic fields, the magnetic structure of GdFe_3H_X transits from a simple ferrimagnetic one to a non-colinear one. Its critical fields decreased from 24.7T to 13.0T.The strength of the exchange interaction depends on the hydrogen composition x judging from the variation in the exchange coupling constant.

  • Research Products

    (30 results)

All Other

All Publications (30 results)

  • [Publications] M. Yamaguchi: "HIGH MAGNETIC FIELD EFFECTS ON METAL-HYDROGEN CHEMICAL SYSTEMS" Sci. Repts. Res. Inst., Tohoku Univ.A-38. 390-398 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M. I. Bartashevich: "MAGNETIC BEHAVIOR OF γ-PHASE HYDRIDES RCo_3H〜_4 IN HIGH MAGNETIC FIELDS" Physica B. 190. 315-326 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M. Yamaguchi: "ULTRAHIGH MAGNETIC FIELD STUDIES OF MEAL HYDRIDES" Zeit. Phys. Chem. N. F.179. 439-444 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M. I. Bartashevich: "MAGNETIC PROPERTIES OF SINGLE CRYSTAL γ-PHASE HYDRIDES RCo_3H_x" Zeit. Phys. Chem. N. F.179. 445-449 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M. I. Bartashevich: "MAGNETIC PROPERTIES OF YFe_3 HYDRIDES" Zeit. Phys. Chem.179. 451-456 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M. I. Bartashevich: "MAGNETIC PROPERTIES OF NdCo_3 AND ITS γ-PHASE HYDRIDE NdCo_3H_<4.1>" J. Alloys and Compounds. 202. 7-12 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M. I. Bartashevich: "HIGH FIELD MAGNETIZATION OF NdCo_5 AND NdCo_5H_3 SINGLE CRYSTALS" Solid State Commun,. 87. 1093-1095 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 山口益弘: "金属水素化物の電気抵抗と相変化" 水素エネルギーシステム. 19. 28-32 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T. Goto: "ITINERANT METAMAGNETISM OF THE Co-SUBLATTICE IN THE Y_1-_xNd_xCo_3 SYSTEM UNDER ULTRAHIGH MAGNETIC FIELDS UP TO 110T" Physica B. 193. 10-16 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M. I.Bartashevich: "ULTRAHIGH FIELD MAGNETIZATION OF YCo_3 HYDRIDES" Physica B. 201. 135-138 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] F. Ishikawa: "RELATIONSHIPS BETWEEN THE ELECTRICAL RESISTIVITY AND METAL-HYDRIDE PHASES" to be published in Zeit. Phys. Chem. N. F.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M. Yamaguchi: "ELECTRICAL STRUCTURE OF FERROMAGNETIC HYDRIDES STUDIED BY ULTRA-HIGH FIELD MAGNETIZATION" to be published in Zeit. Phys. Chem. N. F.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K. Matsuda: "MAGNETIC PROPERTIES OF THE HYDRIDES BASED ON R-Fe COMPOUNDS" to be published in J. Alloys and Compounds.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M. I. Bartashevich: "EFFECT OF HYDROGEN ON THE MAGNETOCRYSTALLINE ANISOTROPY IN R-Co COMPOUNDS" to be published in Zeit. Phys. Chem. N. F.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M. I. Bartashevich: "CRYSTAL STRUCTURE OF γ-PHASE RCo_3H_<〜4> HYDRIDES" to be published in Zeit. Phys. Chem. N. F.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Yamaguchi, I.Yamamoto, T.Goto and S.Miura: "HIGH MAGNETIC FIELD EFFECTS ON METALHYDROGEN CHEMICAL SYSTEMS" Sci.Repts.Res.Inst., Tohoku Univ.Vol.A-38, No.2. 390-398 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.I.Bartashevich, T.Goto, M.Yamaguchi, I.Yamamoto and F.Sugaya: "MAGNETIC BEHAVIOR OF gamma-PHASE HYDRIDES RCo_3H_<-4> IN HIGH MAGNETIC FIELDS" Physica B. 190. 315-326 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Yamaguchi, I.Yamamoto, M.I.Bartashevich, T.Goto and S.Miura: "ULTRAHIGH MAGNETIC FIELD STUDIES OF METAL HYDRIDES" Zeit.Phys.Chem.N.F.179. 439-444 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.I.Bartashevich, T.Goto, M.Yamaguchi and I.Yamamoto: "MAGNETIC PROPERTIES OF SINGLE CRYSTAL gamma-.PHASE HTDRIDES RCo_3H_X" Zeit.Phys.Chem.N.F.179. 445-449 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.I.Bartashevich, F.Sugaya, M.Yamaguchi, I.Yamamoto, T.Goto, A.Ito and S.Morimoto: "MAGNETIC PROPERTIES OF YFe_3 HYDRIDES" Zeit.Phys.Chem.179. 451-456 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.I.Bartashevich, K.Koui, T.Goto, M.Yamaguchi, I.Yamamoto and F.Sugaya: "MAGNETIC PROPERTIES OF NdCo_3 AND ITS gammaPHASE HYDRIDE NdCo_3H_<4.1>" J.Alloys and Compounds. 202. 7-12 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.I.Bartashevich, T.Goto, M.Yamaguchi, I.Yamamoto and R.J.Redwanski: "HIGH FIELD MAGNETIZATION OF NdCo_5 AND NdCo_5H_3 SINGLE CRYSTAL" Solid State Commun. Vol.87, No.12. 1093-1095 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Yamaguchi, F.Ishikawa, H.Tega, I.Yamamoto: "RELATIONSHIP BETWEEN THE ELECTRICAL RESISTIVITIS AND THE METAL HYDRIDDEE PHASES" Hydrogen Energy System. 19(in japanese). 28-32 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Goto, K.Koui, M.I.Bartashevich, H.A.Katori, M.Yamaguchi, I.Yamamoto and F.Sugaya: "ITINERANT METAMAGNETISM OF THE Co-SUBLATTICE IN THE Y_<1-X>Nd_XCo_3 SYSTEM UNDER ULTRAHIGH MAGNETIC FIELDS UP TO 110T" PhysicaB. 193. 10-16 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.I.Bartashevich, H.A.Katori, T.Goto, I.Yamamoto and M.Yamaguchi: "ULTRAHIGH FIELD MAGNETIZATION OF YCo_3 HYDRIDES" PhysicaB. 201. 135-138 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] F.Ishikawa, H.Tega, I.Yamamoto and M.Yamaguchi: "RELATIONSHIPS BETWEEN THE ELECTRICAL RESISTIVITY AND METAL-HYDRIDE PHASES" to be published in Zeit.Phys.Chem.N.F.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Yamaguchi, I.Yamamoto, M.I.Bartashevich, H.A.Katori, and T.Goto: "ELECTRICAL STRUCTURE OF FERROMAGNETIC HYDRIDES STUDIED BY ULTRA-HIGH FIELD MAGNETIZATION" to be published in Zeit.Phys.Chem.N.F.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Matsuda, I.Yamamoto, M.Yamaguchi, H.A.Katori, T.Goto and M.I.Bartashevich: "MAGNETIC PROPERTIES OF THE HYDRIDES BASED ON R-Fe COMPOUNDS" to be published in J.Alloys and Compounds.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.I.Bartashevich, T.Goto, M.Yamaguchi and I.Yamamoto: "EFFECT OF HYDROGEN ON THE MAGNETOCRYSTALLINE ANISOTROPY IN R-Co COMPOUNDS" to be published in Zeit.Phys.Chem., N.F.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.I.Bartashevich, A.Pirogov, V.Voronin, T.Goto, M.Yamaguchi and I.Yamamoto: "CRYSTAL STRUCTURE OF gamma-PHASE RCo_3H_<-4> HYDRIDES" to be published in Zeit.Phys.Chem.N.F.

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

URL: 

Published: 1996-04-15  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi