1996 Fiscal Year Annual Research Report

レーザMBE法による強誘電体/強磁性体傾斜機能材料の創成

Research Project

Project/Area Number	08243236
Research Institution	Osaka University
Principal Investigator	田畑仁大阪大学, 産業科学研究所, 助手 (00263319)
Co-Investigator(Kenkyū-buntansha)	金井真樹大阪大学, 産業科学研究所, 助手 (50243267) 川合知二大阪大学, 産業科学研究所, 教授 (20092546)
Keywords	レーザーMBE / 傾斜機能材料 / 原子層成長 / 酸化物結晶成長 / 強誘電体 / 強磁性体 / RHEED
Research Abstract	(1)ペロブスカイト構造を持つ機能性酸化物の中で、特に(強)誘電体、(強)磁性体に着目し、格子定数、熱膨張係数等のパラメータを考慮してヘテロ成長が期待される以下の組み合わせを選定した。選定材料は、誘電体;MTiO_3、磁性体;MMnO_3,MCoO_3(M=Ba,Sr,Ca,La etc.)である。 (2)レーザアブレーションを用いたMBE成膜法による傾斜構造の形成。先ず誘電体同士、磁性体同士の傾斜組成化を行い電気・磁気特性の評価を行った。例えば(Ba_<1-x>Sr_x)TiO_3で、数種類の組成(x)を傾斜層として組み合わせることにより、多段階のキュリー温度を持ち、広範囲な温度域で高い誘電特性を示す傾斜誘電材料が創成できた。 (3)傾斜構造成長過程の評価。傾斜構造形成中に反射電子線回折装置(RHEED)によるその場観察により、ペロブスカイト構造形成のメカニズムと傾斜構造の成長過程を調べた。 (4)計算化学による材料設計。パソコンを用いた分子動力学計算により、傾斜構造化に伴う最適結晶構造を予測した。

Research Products
(14 results)

All Other

All Publications (14 results)

[Publications] H.Tabata: "Epitaxial Growth of Bi-Layered Structured Superlattce by a Pulsed Lasser Deposition and Their Dielectric Properties." invited paper on Mat.Res.Soc.Symp.401. 73-84 (1996)
[Publications] H.Tanaka: "Controlling foctors on the synthesis of Pb(Zr_xTi_<1-x>)O_3 films" Thin Solid Films. 289. 29-33 (1996)
[Publications] H.Tanaka: "Molecular dynamics simulation for the crystal structures of ferroelectric and dielectric materials of BaTiO_3-SrTiO_3-CaTiO_3" Phys.Rev.B. 53. 14112-14116 (1996)
[Publications] T.Kawai: "Novel Properties in Artificially Structured Di-and Ferro-electric Thin Films." J.Kor.Phys.Soc.29. S591-S593 (1996)
[Publications] T.Kawai: "Harmonic lntegration of Functional Metal Oxide Artificial Lattices" Mat.Sci.& Eng.B41. 123-130 (1996)
[Publications] S.Honstu: "Giant Electric Field Effect on Al/BaTiO/(Y_<0.6>Pr_<0.4>)Ba_2Cu_3O_y structures" Jpn.J.Appl.Phys.6B. L184-L187 (1996)
[Publications] S.Honstu: "Pulsed Laser Deposiiton of Bioceramic Hydroxyapatite Thin Films on Polymer Materials" Jpn.J.Appl.Phys.35. L1208-L1210 (1996)
[Publications] S.Hayamizu: "Preparation of Crystallized Zinc Oxide (ZnO) Films on Amorphous Glass Substrates by a Laser Ablation Technique." J.Appl.Phys.80. 787-791 (1996)
[Publications] O.Nakagawara: "Electrical Properties of (Zr,Sn)TiO_4 Dielectric Thin Film by Pulsed Laser Deposition" J.Appl.Phys.80. 388-392 (1996)
[Publications] O.Nakagawara: "Preparation and electrical properties of (Zr,Sn)TiO_4 dielectric thin films by laser ablation." Mat.Res.Soc.Symp.Proc.401. 97-102 (1996)
[Publications] A.Kubo: "Bias dependence of the STM observation on the adsorbed Sr atoms over SrTiO_3 √5x√5 surfaces" Jpn.J.Appl.Phys.35. L1692-L1694 (1996)
[Publications] S.Honstu: "Electrical properties of hydroxyapatite thin films grown by laser deposition." accepted for Thin Solid Films.(1997)
[Publications] H.Tabata: "Dielectric Properties of Strained (Sr,Ca)TiO_3/(Ba,Sr)TiO_3 Artificial Lattices" Appl.Phys.Lett.70. 321-323 (1997)
[Publications] H.Tabata: "Novel Electric Properties on Ferroelectric/Ferromagnetic Heterostructures." accepted for 電子情報通信学会欧文誌. (1997)

1996 Fiscal Year Annual Research Report

レーザMBE法による強誘電体/強磁性体傾斜機能材料の創成

Principal Investigator

田畑 仁 大阪大学, 産業科学研究所, 助手 (00263319)

Research Products

[Publications] H.Tabata: "Epitaxial Growth of Bi-Layered Structured Superlattce by a Pulsed Lasser Deposition and Their Dielectric Properties." invited paper on Mat.Res.Soc.Symp.401. 73-84 (1996)

[Publications] H.Tanaka: "Controlling foctors on the synthesis of Pb(Zr_xTi_<1-x>)O_3 films" Thin Solid Films. 289. 29-33 (1996)

[Publications] H.Tanaka: "Molecular dynamics simulation for the crystal structures of ferroelectric and dielectric materials of BaTiO_3-SrTiO_3-CaTiO_3" Phys.Rev.B. 53. 14112-14116 (1996)

[Publications] T.Kawai: "Novel Properties in Artificially Structured Di-and Ferro-electric Thin Films." J.Kor.Phys.Soc.29. S591-S593 (1996)

[Publications] T.Kawai: "Harmonic lntegration of Functional Metal Oxide Artificial Lattices" Mat.Sci.& Eng.B41. 123-130 (1996)

[Publications] S.Honstu: "Giant Electric Field Effect on Al/BaTiO/(Y_<0.6>Pr_<0.4>)Ba_2Cu_3O_y structures" Jpn.J.Appl.Phys.6B. L184-L187 (1996)

[Publications] S.Honstu: "Pulsed Laser Deposiiton of Bioceramic Hydroxyapatite Thin Films on Polymer Materials" Jpn.J.Appl.Phys.35. L1208-L1210 (1996)

[Publications] S.Hayamizu: "Preparation of Crystallized Zinc Oxide (ZnO) Films on Amorphous Glass Substrates by a Laser Ablation Technique." J.Appl.Phys.80. 787-791 (1996)

[Publications] O.Nakagawara: "Electrical Properties of (Zr,Sn)TiO_4 Dielectric Thin Film by Pulsed Laser Deposition" J.Appl.Phys.80. 388-392 (1996)

[Publications] O.Nakagawara: "Preparation and electrical properties of (Zr,Sn)TiO_4 dielectric thin films by laser ablation." Mat.Res.Soc.Symp.Proc.401. 97-102 (1996)

[Publications] A.Kubo: "Bias dependence of the STM observation on the adsorbed Sr atoms over SrTiO_3 √5x√5 surfaces" Jpn.J.Appl.Phys.35. L1692-L1694 (1996)

[Publications] S.Honstu: "Electrical properties of hydroxyapatite thin films grown by laser deposition." accepted for Thin Solid Films.(1997)

[Publications] H.Tabata: "Dielectric Properties of Strained (Sr,Ca)TiO_3/(Ba,Sr)TiO_3 Artificial Lattices" Appl.Phys.Lett.70. 321-323 (1997)

[Publications] H.Tabata: "Novel Electric Properties on Ferroelectric/Ferromagnetic Heterostructures." accepted for 電子情報通信学会欧文誌. (1997)

田畑仁大阪大学, 産業科学研究所, 助手 (00263319)