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新強誘電体薄膜の探索

Research Project

Project/Area Number 12134206
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

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

Principal Investigator

藤村 紀文  大阪府立大学, 工学研究科, 教授 (50199361)

Co-Investigator(Kenkyū-buntansha) 田畑 仁  大阪大学, 産業科学研究所, 教授 (00263319)
松井 利之  大阪府立大学, 工学研究科, 講師 (20219372)
Project Period (FY) 2000 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥39,100,000 (Direct Cost: ¥39,100,000)
Fiscal Year 2003: ¥8,500,000 (Direct Cost: ¥8,500,000)
Fiscal Year 2002: ¥13,400,000 (Direct Cost: ¥13,400,000)
Fiscal Year 2001: ¥17,200,000 (Direct Cost: ¥17,200,000)
KeywordsYMnO_3 / MOS(MFIS)キャパシタ / 電界効果型トランジスタ / 磁性強誘電体 / 多値メモリ / 新強誘電体メモリ / 強誘電体ゲートトランジスタ / 新強誘電体物質設計 / 減分極電界 / カルコゲン系強誘電体 / BaZrO_3 / リラクサー強誘電体 / 新強誘電体物質 / MFIS / バンドアライメント / 低エネルギープラズマ窒化 / カルコゲナイド
Research Abstract

磁性強誘電体YMnO_3系と半導体の接合によってMOS界面(MFIS界面)を形成し,新規な電界効果型の不揮発性メモリの開発を行っている。
1)強磁性強誘電体RMnO_3系物質の開発
YMnO_3の成長において問題であった成長中の組成変動を、ターゲットの作成方法、基盤加熱機構、レーザー波長の短波長化によって抑制し、分極ヒステリシスの矩形性を大幅に改善した。
2)YMnO_3を用いたMOS(MFIS)キャパシタの記憶保持特性
YMnO_3をSi上にエピタキシャル成長させMOS(MFIS)キャパシタを作成した.強誘電体ゲートトランジスタの問題点を記憶保持特性の改善と認識し、記憶保持特性に及ぼすリーク電流の影響を昨年度より詳細に把握した。
3)YMnO_3を用いたMFIS電界効果型トランジスタの作成に向けた成長温度の低減化
YMnO_3を用いたMFIS電界効果型トランジスタを試作中にYMnO_3のクラッキングの問題が生じた.成長温度を低温化することによって対処する予定である。昨年度、成長温度は650℃まで低減できることが明らかになっていたが、650℃で作製した試料では十分な強誘電性が得られないことがわかった。現在は、740℃で成長している。
4)YMnO_3を用いたMFIS電界効果型トランジスタの試作
YMnO_3を用いたMFIS電界効果型トランジスタを20μmと大きなゲート長ではあるが全行程を終了した。YMnO_3のエッチングなどのデバイスプロセスの問題点が顕在化し、未だ良好なトランジスタ特性は得られていない。
5)YMnO_3の磁気特性と誘電特性との相関
ネール点近傍の温度において、YMnO_3の分極反転の抗電界および低電界側での誘電率に異常があることが見いだされた。

Report

(4 results)
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • Research Products

    (54 results)

All Other

All Publications (54 results)

  • [Publications] T.Yoshimura, N.Fujimura: "Polarization Hysteresis Loops of Ferroelectric Gate Capacitors and the Dependence of the Capacitance for the Insulator Layer"Jpn J.Appl.Phys.. 42. 6011-6014 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Sakata, D.Ito, T.Yoshimura, A.Ashida, N.Fujimura: "Improvement of Surface Morphology and the Dielectric Property of YMnO3 Films"Jpn J.Appl.Phys.. 42. 6003-6006 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] D.Ito, N.Fujimura, T.Yoshimura, T.Ito: "Influence of Schottky and Poole-Frenkel emission on the retention property of YMnO3 based Metal/Ferroelectric/Insulator/Semiconductor capacitors"Journal of Applied Physics. 94. 4036-4041 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Yokota, N.Fujimura, T.Wada, S.Hamasaki, T.Ito: "The Effect of Carrier for Magnetic and Magneto-transport Properties of Si:Ce Films"Journal of Applied Physics. 93. 7679-7681 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Matsui, E.Taketani, N.Fujimura, T.Ito, K.Morii: "Magnetic Properties of Highly Resistive BaFeO3 Thin Films Epitaxially Grown on SrTiO3 Single Crystal Substrates"Journal of Applied Physics. 93. 6993-6995 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] N.Fujimura, D.Ito, H.Sakata, T.Yoshimura, T.Yokota, T.Ito: "Ferromagnetic and Ferroelectric Behaviors of A Site Substituted YMnO3 Based Epitaxial Thin Films"Journal of Applied Physics. 93. 6990-6992 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] D.Ito, N.Fujimura, T.Yoshimura, T.Ito: "Ferroelectric properties of YMnO3 epitaxial films for ferroelectric-gate field effect transistors"Journal of Applied Physics. 93. 5563-5567 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Matsui, H.Tanaka, E.Taketani, N.Fujimura, T.Ito, K.Morii: "Magnetic and Dielectric Properties of Epitaxially Grown BaFeO3 Thin Films on SrTiO3 Single Crystal Substrates"J.Korean Phys.Soc.. 42. S1378-S138 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Yokota, N.Fujimura, T.Ito: "Magnetic and Magneto-transport Properties of Solid Phase Epitaxially Grown Si:Ce Films"Journal of Applied Physics. 93. 4045-4048 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] D.Ito, N.Fujimura, T.Ito: "The effect of leakage current on the retention property of YMnO3 Based MFIS capacitor"Integrated Ferroelectrics. 49. 41-49 (2002)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Yokota, N.Fujimura, T.Wada, S.Hamasaki, T.Ito: "Effect of Substitutionally Dissolved Ce in Si on the Magnetic and Electric Properties of Magnetic Semiconductor : Si1-xCex Films"Applied Phys.Letters.. 81. 4023-4025 (2002)

    • Related Report
      2003 Annual Research Report
  • [Publications] D.Ito, N.Fujimura*, T.Yoshimura, T.Ito: "Ferroelectric properties of YMnO_3 epitaxial films for ferroelectric-gate field effect transistors"Journal of Applied Physics. (accepted for publication). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Yokota, N.Fujimura, T.Wada, S.Hamasaki, T.Ito: "The Effect of Carrier for Magnetic and Magneto-transport Properties of Si : Ce Films"Journal of Applied Physics. (accepted for publication). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Edahiro, N.Fujimura, T.Ito: "Formation of Two-Dimensional Electron Gas and the Magneto-Transport Behavior of ZnMnO/ZnO Heterostructure"Journal of Applied Physics. (accepted for publication). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Yokota, N.Fujimura, T.Ito: "Magnetic and Magneto-transport Properties of Solid Phase Epitaxiallv Grown Si : Ce Films"Journal of Applied Physics. (accepted for publication). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] N.Fujimura, D.Ito, H.Sakata, T.Ito: "Ferromagnetic and Ferroelectric Behaviors of A Site Substituted YMnO_3 Based Epitaxia1 Thin Films"Journal of Applied Physics. (accepted for publication). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Ito D, Fujimura N, Ito T: "The effect of leakage current on the retention property of YMnO_3 based MFIS capacitor"Integrated Ferroelectrics. 49. 41-49 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Matsui, H.Tanaka, N.Fujimura, T.Ito, H.Mabuchi, K.Morii: "Structural, Dielectric and Magnetic Properties of Epitaxially Grown BaFeO_3 Thin Films on (100) SrTiO3 Single-crystal Substrates"Applied Physics Letters. Vol.81. 2764-2766 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Nagata, A.Ashida, Y.Takagi, N.Fujimura, T.Ito: "Electro-optic Effect in Epitaxial ZnO : Mn Thin Films"Japanese Journal of Applied Physics. 41. 6916-6918 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Matsui, Y.Kitano, N.Fujimura, K.Morii, T.Ito: "Crystal Growth and Interface Characterization of Dielectric BaZrO_3 Thin Films on Si Substrates"Japanese Journal of Applied Physics. 41. 6639-6642 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Y.Kitano, T.Matsui, N.Fujimura, K.Morii, T.Ito: "Thin Film Crystal Growth of BaZrO_3 at Low Oxygen Partial Pressure"Journal of Crystal Growth. 243(1). 164-169 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] K.Kakuno, D.Ito, N.Fujimura, T.Matsui, T.Ito: "Growth Process and Interfacial Structure of Epitaxial Y_2O_3/Si Thin Films Deposited by Pulsed Laser Deposition"Journal of Crystal Growth. 237(Part1). 487-491 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] D.Ito, N.Fujimura, K.Kakuno, T.Ito: "Retention Property Analysis of Epitaxially Grown YMnO_3/Y_2O_3/Si Capacitor"Ferroelectrics. 271. 87-92 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Yokota, N.Fujimura, T.Wada, S.Hamasaki, T.Ito: "Effect of Substitutionally Dissolved Ce in Si on the Magnetic and Electric Properties of Magnetic Semiconductor : Si_<1-x>Ce_x Films"Applied Phys. Letters. 81. 4023-4025 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Matsui, H.Tanaka, N.Fujimura, T.Ito, H.Mabuchi, K.Morii: "Structural, Dielectric and Magnetic Properties of Epitaxially Grown BaFeO_3 Thin Films on (100) SrTiO3 Single-crystal Substrates"Applied Phys. Letters. Vol.81. 2764-2766 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Yokota, N.Fujimura, T.Wada, S.Hamasaki, T.Ito: "Ce Concentration Dependence on the Magnetic and Transport Properties of Ce Doped Si Epitaxial Films Prepared by Molecular Beam Epitaxy"Journal of Applied Physics. 91 10. 7905-7907 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Shimuta, O.Nakagawara, T.Makino, A.Arai, H.Tabata, T.Kawai: "Enhancement of Remanent Polarization in epitaxial BaTiO_3/SrTiO_3 Superlattices with "Asymmetric" Structure"Journal of Applied Physics. 91. 2290-2294 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Y.Hotta, E.Rokuta, J.-H.Choi, H.Tabata, T.Kawai: "Determination of the Optical Cation Composition of Ferroelectric (ZnxCd1-x)S Thin Films for Applications to Silicon Based Nonvolatile Memories"Applied Physics Lett.. 80. 3180-3182 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] O.Nakagawara, T.Shimuta, T.Makino, A.Arai, H.Tabata, T.Kawai: "Dependence of Dielectric and Ferroelectric Behaviors on Growth Orientation in Epitaxial BaTiO_3/SrTiO_3 Superlattices"Vacuum. 66. 397-401 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] E.Rokuta, H.Tabata, T.Kawai: "Strong Dependencies of Electrical Characteristics of Bi_4Ti_3O_<12>/Oxynitride/Si Interfacial Proximity on Nitrogen Plasma"Journal of Vacuum Science & Technology B. (in press). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Y.-G.Park, H.-Y.Lee, H.Tanaka, H.Tabata, T.Kawai: "Photo-induced Ferroelectric Hysteresis Curve in Organic CuPc Photoconductor/Inorganic BaTiO_3 Ferroelectric Hetero-junction Photomemory"Applied Physics Lett.. 81. 1318-1320 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Shimura, N.Fujimura, T.Wakano, T.Yoshimura, T.Ito: "Polarization behavior of Li-doped ZnO thin films on Si"Applied Physics A. (accepted). (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Nagata, A.Ashida, N.Fujimura, T.Ito: "Electro-optic Property of ZnO:X(X=Li,Mg)Thin Films"Journal of Crystal Growth. (accepted). (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Nagata, T.Shimura, Y.Nakano, A.Ashida, N.Fujimura, T.Ito: "Ferroelectricity in Li-Doped ZnO:X Thin Films and the Application for the Optical Switching Devices"Jpn.J.Appl.Phys.. 40. 5615-5618 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] D.Ito, N.Fujimura, K.Kakuno, T.Ito: "Retention property analisis of epitaxially grown YMnO_3/Y_2O_3/Si capacitor"Ferroelectrics. (accepted). (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Wakano, N.Fujimura, N.Abe, Y.Morinaga, A.Ashida, T.Ito: "Magnetic and magneto-transport properties of ZnO:Ni films"Physica E. 10. 260-264 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Yamaguchi, H.Kato, N.Fujimura, T.Ito: "Annealing behavior of electrical properties in plasma-exposed Ti/p-Si interfaces"Thin Solid Films. 396. 119-125 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] K.Kakuno, D.Ito, N.Fujimura, T.Matsui, T.Ito: "Growth process and interfacial structure of epitaxial Y_2O_3/Si thin films deposited by PLD"Journal of Crystal Growth. (accepted). (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] N.Fujimura, D.Ito, T.Ito: "The progress of the YMnO_3/Y_2O_3/Si system for ferroelectric gate field effect transistor"Ferroelectrics. (accepted). (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] K.Ueda, Y.Muraoka, H.Tabata, T.Kawai: "Atomic ordering in the LaFe_<0.5>Mn_<0.5>O_3 solution film"Appl.Phys.Lett.. 78(4). 512-514 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] K.Ueda, H.Tabata, T.Kawai: "Control of magnetic properties in LaCrO_3-LaFeO_3 artificial superlattices"J.Appl.Phys.. 89(5). 2847-2851 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Y.Hotta, E.Rokuta, H.Tabata, H.Kobayashi, T.Kawai: "Optimization of electronic-band alignments at ferroelectric(Zn_xCd_<1-x>S/Si(100) interfaces"Appl.Phys.Lett.. 78(21). 3283-3285 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] E.Rokuta, Y.Hotta, J.-H.Choi, H.Tabata, H.Kobayashi, T.Kawai: "Ferroelectric Bi_4Ti_3O_<12> Films on Si(100)with An Ultrathin Buffer Layer of Silicon Oxynitride: A Comparative Study Using X-Ray Photoelectron Spectroscopy"Jpn.J.Appl.Phys.. 40. 5564-5568 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] E.Rokuta, Y.Hotta, T.Kubota, H.Tabata, H.Kobayashi, T.Kawai: "Effects of an ultrathin silicon oxynitride buffer layer on electrical properties of ferroelectric Bi_4Ti_3O_<12> thin films on p-Si(100)surfaces"Appl.Phys.Lett.. 79(3). 403-405 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Y.Muraoka, H.Tabata, T.Kawai: "Effects of light-irradiation on spin-glass state and magnetoresistive properties of Zn_<0.5>Co_<0.5>Fe_2O_4 spinel ferrite films"Solid State Commn.. 120. 255-258 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] E.Rokuta, J.-H.Choi, Y.Hotta, H.Tabata, H.Kobayashi, T.Kawai: "Interface control of Bi_4Ti_3O_<12> film growth on Si(100)by use of an ultrathin silicon oxynitride buffer layer"Appl.Phys.Lett.. 79(12). 1858-1860 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] .Hotta, E.Rokuta, J.H.Choi, H.Tabata, T.Kawai: "Determination of the optimal cation compositiion of ferroelectric(Zn,Cd)S thin films for an application to based nonvolatile memories"Appl.Phys.Lett.. (accepted). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Yoshimura,N.Fujimura,D.Ito and T.Ito: "Characterization of ferroelectricity in metal/ferroelectric/insulator/semiconductor structure by pulsed C-V measurement ; Ferroelectricity in YMnO_3/Y_2O_3/Si structure"J.Appl.Phys.. 87. 3444 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] D.Ito,N.Fujimura,and T.Ito,: "Initial stage of thin film growth of pulsed laser deposited YMnO_3 thin film"Jpn.J.Appl.Phys.. 39. 5525 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] K.Tadanaga,H.Kitahata,T.minami,N.Fujimura,and T.Ito: "Preparation and Ferroelectric Properties of YMnO_3 Thin Films With c-Axis Preferred Orientation by the Sol-Gel Method"J.Sol-Get Sci.tech. 19. 589 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] D.Ito,T.Yoshimura,N.Fujimura,and T.Ito,: "Improvement of Y_2O_3/Si interface for FeRAM application"Appl.Sur.Sci.. 159. 138 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] N.Fujimura,T.Yoshimura,D.Ito and T.Ito: "Evaluation of Ferroelectricity in MFIS Type Capacitor Using Pulsed C-V Measurement"Symposia Proc.of Materials Research Society. 596. 407 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Kitahata,K.Tadanaga,T.Minami,N.Fujimura,and T.Ito: "Origin of Leakage Current of YMnO_3 Thin Films Prepared by the Sol-Get Method"Symposia Proc.of Materials Research Society. 596. 481 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] N.Fujimura,T.Yoshimura,D.Ito,T.Shimura and T.Ito: "Any candidates of ferroelectric material for transistor type FeRAM?"Applied Physics A. (In press). (2000)

    • Related Report
      2000 Annual Research Report

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Published: 2001-04-01   Modified: 2018-03-28  

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