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Photo-enhanced magnetization in semiconductors thin films incorporating magnetic dots

Research Project

Project/Area Number 12450007
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied materials science/Crystal engineering
Research InstitutionTOKYO INSTITUTE OF TECHNOLOGY

Principal Investigator

MUNEKATA Hiroo  Tokyo Institute of Technology School of Science and Technology, Imaging Science and Engineering Laboratory, Professor, 大学院・理工学研究科, 教授 (60270922)

Project Period (FY) 2000 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥14,400,000 (Direct Cost: ¥14,400,000)
Fiscal Year 2003: ¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2002: ¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2001: ¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2000: ¥3,600,000 (Direct Cost: ¥3,600,000)
KeywordsSpintronics / Magnetic-Semiconductor Hybrid Structures / Photo-magnetization / Metamagnet / Cooperative Phenomenon / Nano-technology / メタ磁性 / キャリア誘起磁性 / 磁性半導体 / 超常磁性 / 磁性体・半導体融合構造 / GaAs / Fe / ナノクラスター / 光誘起磁性 / 分子線エピタキシー / 光磁気記録
Research Abstract

Enhancement of magnetization by the light illumination at room temperature (RT) has been reported in the year 2000 for semiconductor-magnetic composite films prepared by the alternative deposition of Fe and GaAs on GaAs(001) substrates at high substrate temperature of 580 "C. While this was a very encouraging achievement for the future applications such as the wireless micro-electronic mechanical system, the origin of the photo-enhanced magnetization (PEM) has remained unclear. It was partly because of the fact that those samples consisted of polycrystalline, granular structures whose constituent ingredients were not well engineered nor controlled. This research was initiated with the aim to identify the key materials and elucidate the mechanism of PEM.
Systematic studies of samples prepared by the alternative deposition of Fe_3Ga_<2-x>As_x and GaAs were carried out with various deposition sequences and different substrate temperatures T_<s-> GaN-based composite structures were also inv … More estigated. It was found that the samples prepared by molecular beam deposition with the stacking the unit of [100-nm GaAs/50-nm Fe_3Ga_<2-x>As_x/100-nm GaAs] at T_s = 600℃ exhibit significant PEM effect. Metallurgical evaluation by nano-electron probe analysis has revealed that metamagnetic metal Fe_3Ga_4 is responsible for the observed PEM. It was discussed that this compound was formed as a consequence of the interlayer diffusion process between GaAs and Fe_3Ga_<2-x>As. The hypothesis of the inter-particle interaction model, which was introduced at the initial stage of the study in 2000. was found not to be the principle mechanism for the observed PEM effect.
Systematic studies on power dependence of PEM suggest that the increase of magnetization is primarily dominated by the light-induced heating, whereas pure photonic excitation may also contribute the PEM, as manifested itself by the fact that the magnitude of PEM exceeds beyond the maximum value that can be expected from simple heating. This novel effect should be pursued in the future work. Less

Report

(5 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • Research Products

    (42 results)

All Other

All Publications (42 results)

  • [Publications] T.Shinshi, H.Munekata, et al.: "Light-driven microcantilever actuator based on photoenhanced magnetization in GaAs-Fe composite film"Applied Physics Letter. 83. 3425-3427 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Munekata: "Photomagnetic effects in III-V based magnetic semiconductors"Physica E. (in press). (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] A.T.M.K.Jamil, H.Munekata, et al.: "Influence of thermal annealing on light-enhanced magnetization in GaAs-Fe composite structures"The 9th Symposium on the Physics and Application of Spin-Related Phenomena in Semiconductors Exitended Abstracts. PASPS-9. 115-118 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Kondo, H.Munekata, et al.: "(Ga,Mn)N:Sn Epilayers"J.Superconductivity : Incorporating Novel Magnetism. 16. 103-106 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] R.Moriya, H.Munekata, T.Kondo, A.Oiwa: "Preparation of quaternary magnetic alloy semiconductor epilayers (Ga,Mn,Fe)As"Journal of Crystal Growth. 237-239. 1344-1346 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.J.Park, R.Moriya, et al.: "Characteristics of molecular beam epitaxy-grown GaFeAs"Current Applied Physics. 2. 379-384 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 宗片 比呂夫: "ナノテクノロジー大事典(川合知二監修)中の「スピントロニクス」の章"(株)工業調査会. 490-500 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Shinshi, H.Munekata.et al.: "Light-driven microcantilever actuator based on photoenhanced magnetization in a GaAs-Fe composite film"Applied Physics Letter. 83. 3425-3427 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Munekata: "Photomagnetic effects in III-V based magnetic semiconductors"Physica E. (in press).. (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] A.T.M.K.Jamil, H.Munekata, et al.: "Influence of thermal annealing on light-enhanced magnetization in GaAs-Fe composite structures"The 9th Symposium on the Physics and Application of Spin-Related Phenomena in Semiconductors Extended Abstracts. PASPS-9. 115-118 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Kondo, H.Munekata, et al.: "(Ga, Mn)N : Sn Epilayers"J.Superconductivity : Incorporating Novel Magnetism. 16. 103-106 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] R.Moriya, H.Munekata, T.Kondo, A.Oiwa: "Preparation of quaternary magnetic alloy semiconductor epilayers (Ga, Mn, Fe)As"Journal of Crystal Growth. 237-239. 1344-1346 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.J.Park, R.Moriya, et al.: "Characteristics of molecular beam epitaxy-grown GaFeAs"Current Applied Physics. 2. 379-384 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] R.Moriya, H.Munekata, et al.: "Preparation and magneto-optical property of highly-resistive (Ga, Fe)As epilayers"Physica E. 10. 224-228 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] S.Haneda, S.Koshihara, H.Munekata: "Formation of FeAs and Fe crystallites in GaAs-Fe composite structures and their roles in light-enhanced magnetization"Physica E. 10. 437-441 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] P.Fumagalli, H.Munekata, et al.: "Observation of reversed hysteresis loops and negative coercivity in granular GaAs-Fe hybrid structures"J. Appl. Phys.. 89. 7015-7017

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.L.Soo, H.Munekata, et al.: "Local structures around Fe in diluted magnetic semiconductors Ga_<1-x>Fe_xAs studied by x-ray absorption fine structure"Phys. Rev. B. 63. 195209-195212 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] S.Kuwabara, T.Kondo, et al.: "Molecular Beam Epitaxy of Wurtzite GaN-Based Magnetic Alloy Semiconductors"Jpn. J. Appl. Phys.. 40. L724-L727 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] S.Haneda, H.Munekata, et al.: "Fe-based magnetic-semiconductor hybrid structures for photocarrier-induced magnetism"J. Appl. Phys.. 87. 6445-6447 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Shinshi, H.Munekata, et al.: "Light-driven microcantilever actuator based on photoenhanced magnetization in a GaAs-Fe composite film"Applied Physics Letter. 83. 3425-3427 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] A.T.M.K.Jamil, H.Munekata, et al.: "Influence of thermal annealing on light-enhanced magnetization in GaAs-Fe composite structures"The 9th Symposium on the Physics and Application of Spin-Related Phenomena in Semiconductors Extended Abstracts. PASPS-9. 115-118 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Kondo, H.Munekata, et al.: "(Ga, Mn)N : Sn Epilayers"J.Superconductivity : Incorporating Novel Magnetism. 16. 103-106 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Munekata, A.Oiwa, et al.: "Rotation of Ferromagnetically Coupled Mn Spins in (Ga, Mn)As by Hole Spins"J.Superconductivity : Incorporating Novel Magnetism. 16. 411-414 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 宗片 比呂夫: "ナノテクノロジー大事典(川合知二監修)中の「スピントロニクス」の章"(株)工業調査会. 490-500 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] R.Moriya, H.Munekata, T.Kondo, A.Oiwa: "Preparation of quaternary magnetic alloy semiconductor epilayers (Ga,Mn,Fe)As"Journal of Crystal Growth. 237-239. 1344-1346 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Y.J.Park, R.Moriya, H.Munekata, et al.: "Characteristics of molecluar beam epitaxy-grown GaFeAS"Current Applied Physics. 2. 379-384 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] S.Yanagi, H.Munekata, Y.Kitamoto, A.Oiwa, T.Slupinski: "Interlayer coupling in (In,Mn)As/In/As/(In,Mn)As magnetic semiconductor trilayer structures"Journal of Applied Physics. 91. 7902-7905 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] R.Moriya, H.Munekata: "Relation among concentrations of incorporated Mn atoms, ionized Mn acceptors, and holes in p-(Ga,Mn)As epilayers"Journal of Applied Physics. 93(8), April. 7 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Kondo, S.Kuwabara, H.Owa, H.Munekata: "Molecular beam epitaxy of (Ga,Mn)N"Journal of Crystal Growth. 237-239. 1353-1357 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 近藤 剛, 宗片 比呂夫: "(Ga,Mn)Nの結晶成長と磁性-窒素プラズマMBE-"応用物理. 71. 1272-1275 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] S.Haneda, S.Koshihara, H.Munekata: "Formation of FeAs and Fe crystallites in GaAs -Fe composite structures and their roles in light -enhanced magnetization"Physica E.. 10. 437-441 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Y.L.Soo, G.Kioseoglou, S.Huang, S.Kim, Y.H.Kao, Y.Takatani, S.Haneda, H.Munekata: "Local structures around Fe in diluted magnetic semiconductors Ga_<1-x>Fe_xAs studied by x -ray absorption fine stiructure"Phys. Rev. B.. 63. 195209-195212 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] P.Fumagalli, G.Sommer, H.Lippitz, S.Haneda, H.Munekata: "Observation of reversed hysteresis loops and negative coercivity in granular GaAs -Fe hybrid structures"J.Appl. Phys.. 89. 7015-7017 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] H.Munekata: "Photoinduced Magnetism in Senilconductor -Based Structures"Journal of Superconductivity, Incorporating Novel Magnetism. 14. 205-210 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Y.Kuwabara, T.Kondo, T. Chkyow, P.Ahmet, H.Munekata: "Molecular Beam Epitaxy of Wurtzite GaN -Based Magnetic Alloy Semiconductors"Jpn. J. Appl. Phys.. 40. L724-L727 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Y.L.Soo, G.Kioseoglou, S.Kim, S.Huang, Y.H.Kao, S.Kuwabara, S.Owa, T.Kondo, H.Munekata: "Local Structure and Chemical Valency of Mn Impurities in Wide -Baudgap III-V Magnetic Alloy Semiconductors Ga_<1-x>Mn_xN"Appl. Phys. Lett.. 79. 3926-3928 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] S.Haneda,M.Yamaura,Y.Takatani,K.Hara,S.Harigae and H.Munekata: "Preparation and characterization of Fe-based III-V Diluted Magnetic Semiconductor (Ga, Fe) As"Japan Journal of Applied Physics. 39. L9-L12 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] S.Haneda,H.Munekata,Y.Takatani and S.Koshihara: "Fe-based magnetic-semiconductor hybrid structures for photocarrier-induced magnetism"Journal of Applied Physics. 87. 6445-6447 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 宗片比呂夫: "磁性混晶半導体"日本結晶成長学会誌. 27. 225-231 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Y.Takatani,S.Haneda,M.Yamaura,M.Tachibana,and H.Munekata: "Preparation of (Ga, Fe) As and its photo-magnetic characteristics"Inst.Phys.Conf.Series (Paper presented at 26^<th> Int.Symp.Compound Semiconductors, Berlin) . 166. 83-86 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] S.Haneda,S.Koshihara and H.Munekata: "Formation of FeAs and Fe crystallites in GaAs-Fe composite structures and their roles in light-enhanced magnetization"The Intrn'l Conf.on the Physics and Application of Spin-Related Phenomena in Semiconductors, Abstract booklet. 146-147 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 近藤剛,宗片比呂夫: "ポリジアセチレン薄膜の初期形成過程と三段階堆積法"Molecular Electronics and Bioelectronics. 11(3). 219-224 (2000)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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