1999 Fiscal Year Annual Research Report

機能調和人工格子の形成とナノスケールの相転移現象解明および新規メモリ素子の創成

Research Project

Project/Area Number	11650323
Research Institution	Osaka University
Principal Investigator	田畑仁大阪大学, 産業科学研究所, 助教授 (00263319)
Keywords	強誘電体 / 強磁性体 / 人工格子 / ペロブスカイト / レーザーMBE / メモリ素子 / 機能調和材料 / 構造相転移
Research Abstract	1、機能調和人工格子によるスピン・双極子配列制御従来、個々に独立に研究・論議されてきた強誘電体や強磁性体を、原子・分子層単位での厳密な結晶構造制御により組み合わせた機能調和人工格子を形成し、電荷・スピン状態の制御および新規物性の発現を目指す。さらに、ナノスケールでの相転移現象(誘電率や強磁性転移温度のサイズ効果)を系統的に評価することで、低次元物性を評価した。具体的にはSrRuO_3-SrTiO_3SrRuO_3-BaTiO_3人工格子を形成し、格子歪みと次元性低下による磁気特性変化の相関を明らかにした。 2、有機/無機人工格子における光励起効果高い光電変換機能を有する有機半導体と、優れた磁気・誘電特性を持つ遷移金属酸化物(無機化合物)とのヘテロ構造(pn接合)を構築し、光誘起キャリアを無機層(遷移金属酸化物層)へ注入することにより、光誘起磁性あるいは光誘起双極子の実現を狙った。高い光伝導特性を有する有機光機能材料とのヘテロ構造を構築し、光誘起キャリアを無機層(金属酸化物層)へ注入することにより、光誘起磁性あるいは光誘起双極子の実現を狙う。候補材料として、誘導体;MTiO_3(M=Ba,Sr,Ca,Pb),ZrPbO_3,LiNbO_3(ペロブスカイト類縁)、磁性体;M'FeO_3,M'MnO_3,M'CoO_3(M'=Ba,Sr,Ca,La etc.)等を検討する。また、高い光電機能を有する有機層として、銅フタロシアニン、Alアントラキノンを検討し、実際に積層薄膜構造が作製可能な条件を見出した。

Research Products
(20 results)

All Other

All Publications (20 results)

[Publications] S.Tabuchi: "Morphological Change and Inhibitory Effect on Ag Surface by ArF Excimer Laser Irradiation"Jpn. J. Appl. Phys.. 39・3. (2000)
[Publications] Y.Muraoka: "Photo-control of spin-glass state in Mg_<1.5>FeTi_<0.5>O_4 spinel ferrite films"Appl. Phys. Lett. Feb.28. (2000)
[Publications] M.Joseph: "Ferroelectric behavior of epitaxial Bi_2V_<5.5> thin films on Si (100) formed by pulsed laser deposition"J. Appl. Phys.. (2000)
[Publications] H.Tabata: "Construction of ferroelectric and /or ferromagnetic superlattices by laser MBE and their physical properties"Mat. Sci. & Eng. B. 56. 140-146 (1999)
[Publications] M.Joseph: "Ferroelectric behavior of Li-doped ZnO fthin films on Si (100) by pulsed laser deposition"Appl. Phys. Lett. 74. 2534-2536 (1999)
[Publications] M.Joseph: "p-Type electrical conduction in ZnO fthin films by Ga and N codoping"Jpn. J. Appl. Phys. 38. L1205-L1207 (1999)
[Publications] K.Ueda: "Coexistence of ferroelectricity and ferromagnetism in BiFeO_3-BaTiO_3 thin films at room temperature"Appl. Phys. Lett. 75. 555-557 (1999)
[Publications] K.Ueda: "Atomic arrangement and magnetic properties of LaFeO_3-LaMnO_3 artificial superlattices"Phys. Rev. B.. 60. R12561-12564 (1999)
[Publications] K.Ueda: "Artificial control of spin order and magnetic properties in LaCrO_3-LaFeO_3 superlattices"Jpn. J. Appl. Phys.. 38. 6690-6693 (1999)
[Publications] H.Matsui: "Ferroelectric properties of II-VI type semiconducting thin films on Si (100)"J. Kor. Phys. Soc.. 35. S1323-S1325 (1999)
[Publications] Y.Muraoka: "Preparation and thickness dependence of the magnetic properties of (111)-oriented Mg_<1.5>FeTi_<0.5>O_4 spinel films on sapphire by PLD technique 〜Spin-glass behavior with a high freezing temperature 〜"Vacuum. 16-17 (1999)
[Publications] H.Lee: "Photoelectric properties by Interface effect of orgnic / Inorganic (CuPc/PbTe) multilayer prepared by pulsed laser deposition and thermal evaportion,"J. Kor. Phys. Soc.. 34. S64-S68 (1999)
[Publications] H.Tabata: "Fabrication of new type optical memories by organic / ferroelectrics hetero-structures"J. Kor. Phys. Soc.. 35. S1310-S1312 (1999)
[Publications] H.Y.Lee: "Formation of bismuth vanadate thin film on TiN and Pt bottom electrode and their dielectric properties"J. Kor. Phys. Soc.. 35. S1264-S1266 (1999)
[Publications] S.Hontsu: "Preparation of all oxide ferromagnetic / ferroelectric /supper conducting hetero structures for advanced microwave applications"Supercond. Sci. Technol.. 12. 836-839 (1999)
[Publications] H.Tabata: "Size effect of ferroelectric and ferromagnetic properties of Bi-based perovskite type materials"Mat. Res. Soc. Proc..
[Publications] M.Joseph: "Ferroelectric behavior of Li-doped ZnO fthin films of Si (100) by pulsed laser deposition"Mat. Res. Soc. Proc.. 541. 517-521 (1999)
[Publications] H.Tabata: "Creation of novel properties on ferroelectric / ferromagnetic superlattices"Trans. Mat. Res. Soc. Jpn.. 24[1]. 13-18 (1999)
[Publications] Y.Hotta: "Thin films formation of II - VI type (ZnO & Chalcogenides) wide-gap semiconductors on Si substrate by PLD and their ferroelectric properties"Technical. Report of IEICE 98. 33-38 (1999)
[Publications] 田畑仁: "(解説)脳型メモリ・超五感センサを目指した機能調和材料の創成"人工知能,SIG-FAI. 36. 75-78 (1999)

1999 Fiscal Year Annual Research Report

機能調和人工格子の形成とナノスケールの相転移現象解明および新規メモリ素子の創成

Principal Investigator

田畑 仁 大阪大学, 産業科学研究所, 助教授 (00263319)

Research Products

[Publications] S.Tabuchi: "Morphological Change and Inhibitory Effect on Ag Surface by ArF Excimer Laser Irradiation"Jpn. J. Appl. Phys.. 39・3. (2000)

[Publications] Y.Muraoka: "Photo-control of spin-glass state in Mg_<1.5>FeTi_<0.5>O_4 spinel ferrite films"Appl. Phys. Lett. Feb.28. (2000)

[Publications] M.Joseph: "Ferroelectric behavior of epitaxial Bi_2V_<5.5> thin films on Si (100) formed by pulsed laser deposition"J. Appl. Phys.. (2000)

[Publications] H.Tabata: "Construction of ferroelectric and /or ferromagnetic superlattices by laser MBE and their physical properties"Mat. Sci. & Eng. B. 56. 140-146 (1999)

[Publications] M.Joseph: "Ferroelectric behavior of Li-doped ZnO fthin films on Si (100) by pulsed laser deposition"Appl. Phys. Lett. 74. 2534-2536 (1999)

[Publications] M.Joseph: "p-Type electrical conduction in ZnO fthin films by Ga and N codoping"Jpn. J. Appl. Phys. 38. L1205-L1207 (1999)

[Publications] K.Ueda: "Coexistence of ferroelectricity and ferromagnetism in BiFeO_3-BaTiO_3 thin films at room temperature"Appl. Phys. Lett. 75. 555-557 (1999)

[Publications] K.Ueda: "Atomic arrangement and magnetic properties of LaFeO_3-LaMnO_3 artificial superlattices"Phys. Rev. B.. 60. R12561-12564 (1999)

[Publications] K.Ueda: "Artificial control of spin order and magnetic properties in LaCrO_3-LaFeO_3 superlattices"Jpn. J. Appl. Phys.. 38. 6690-6693 (1999)

[Publications] H.Matsui: "Ferroelectric properties of II-VI type semiconducting thin films on Si (100)"J. Kor. Phys. Soc.. 35. S1323-S1325 (1999)

[Publications] Y.Muraoka: "Preparation and thickness dependence of the magnetic properties of (111)-oriented Mg_<1.5>FeTi_<0.5>O_4 spinel films on sapphire by PLD technique 〜Spin-glass behavior with a high freezing temperature 〜"Vacuum. 16-17 (1999)

[Publications] H.Lee: "Photoelectric properties by Interface effect of orgnic / Inorganic (CuPc/PbTe) multilayer prepared by pulsed laser deposition and thermal evaportion,"J. Kor. Phys. Soc.. 34. S64-S68 (1999)

[Publications] H.Tabata: "Fabrication of new type optical memories by organic / ferroelectrics hetero-structures"J. Kor. Phys. Soc.. 35. S1310-S1312 (1999)

[Publications] H.Y.Lee: "Formation of bismuth vanadate thin film on TiN and Pt bottom electrode and their dielectric properties"J. Kor. Phys. Soc.. 35. S1264-S1266 (1999)

[Publications] S.Hontsu: "Preparation of all oxide ferromagnetic / ferroelectric /supper conducting hetero structures for advanced microwave applications"Supercond. Sci. Technol.. 12. 836-839 (1999)

[Publications] H.Tabata: "Size effect of ferroelectric and ferromagnetic properties of Bi-based perovskite type materials"Mat. Res. Soc. Proc..

[Publications] M.Joseph: "Ferroelectric behavior of Li-doped ZnO fthin films of Si (100) by pulsed laser deposition"Mat. Res. Soc. Proc.. 541. 517-521 (1999)

[Publications] H.Tabata: "Creation of novel properties on ferroelectric / ferromagnetic superlattices"Trans. Mat. Res. Soc. Jpn.. 24[1]. 13-18 (1999)

[Publications] Y.Hotta: "Thin films formation of II - VI type (ZnO & Chalcogenides) wide-gap semiconductors on Si substrate by PLD and their ferroelectric properties"Technical. Report of IEICE 98. 33-38 (1999)

[Publications] 田畑 仁: "(解説)脳型メモリ・超五感センサを目指した機能調和材料の創成"人工知能,SIG-FAI. 36. 75-78 (1999)

田畑仁大阪大学, 産業科学研究所, 助教授 (00263319)

[Publications] 田畑仁: "(解説)脳型メモリ・超五感センサを目指した機能調和材料の創成"人工知能,SIG-FAI. 36. 75-78 (1999)