2006 Fiscal Year Final Research Report Summary
Double Layered Thin Film Fabrication of a/c-controlled YBCO and Manganites, and Tunable Microwave Filters
| Project/Area Number |
15560006
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied materials science/Crystal engineering
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| Research Institution | Mie University |
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Principal Investigator |
ENDO Tamio Mie University, Graduate School of Bioresources, Graduate School of Engineering, Professor, 大学院工学研究科, 教授 (80115691)
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| Project Period (FY) |
2003 – 2006
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| Keywords | Tunable microwave filters / HTS YBCO thin films / Ferromagnetic LBMO. LSMO films / Ion Beam Sputtering / YBCO / LBMO double layers / Microwave absorption / Degradations under double-layers depositions / Superlattice LCMO / YBCO |
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| Research Abstract |
Double layers of Ferromagnetic/Hi-Tc-Superconductors (HTS) can be used for tunable microwave filters at base stations of mobile phone system. Permeability of Ferro-layer is modified by magnetic field, leading to modification of microwave propagation on HTS-layer. It is necessary to obtain single-layers and double-layers which complete such functions. Further, it is important to elucidate microwave absorption (MA) in HTS under magnetic field (H), problems of deteriorations under the double layers depositions and elapsed-degradations of thin films in application periods. In this project, we studied [1] thin film growths of Ferro-LSMO and-LBMO single layers, [2] double layer depositions of LSMO/YBCO and LBMO/YBCO (YBCO: HTS-layer), and their degradations, [3] microwave absorptions in HTS-YBCO and Superlattices under magnetic field.
YBCO thin films were deposited on Mg0 and LAO substrates by Ion Beam Sputtering (IBS) with oxygen plasma supply. We succeeded to grow them at ultra-low temperat
… More
ures and obtained extremely smooth films. We could control a/c-orientation growths completely and elucidated a mechanism of a/c-orientations <surface migration>. Fine crystalline LSMO and LBMO thin films could be grown at ultra-low temperatures. LSMO showed 2D step-terrace growth mode. LSMO over-layers could be grown on a-YBCO under-layers but a part of a-YBCO was changed into c-YBCO. High quality YBCO over-layers could be grown on LBMO under-layers. During the double-layer depositions, the crystallinity of under-LBMO was not degraded but the double-layer surface was much roughened. The surface was very smooth when LBMO was deposited on YBCO layers but under-YBCO was degraded during the double-layer depositions. The crystallinity showed large elapsed-degradations for a few years for a-YBCO/Mg0 but not for a-YBCO/LAO. It was known that the degradation is concerned with lattice matching.
High Tc (86 K) a-YBCO and c-YBCO were fabricated by PLD, and their MA was investigated under H. MA was larger for c-YBCO than for a-YBCO. MA was smaller for H//a than for H//c then it was clarified that a-YBCO is more useful for the double-layered tunable microwave filters. It was elucidated by theoretical analysis that an <excess screening current mechanism> is a major factor for MA. We measured MA on LCMO/YBCO superlattice, and found a quite important fact that MA is large for H perpendicular to the plane but negligible small for H parallel to the plane. Thus we could propose that we can minimize the microwave absorption in HTS-layers for the parallel magnetic field when the Ferro/HTS double-layers (superlattices) will be used for tunable microwave filters in the near future. Less
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Research Products
(161 results)
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[Journal Article] Fabrication of YBCO and LBMO, and YBCO/LBMO Double Layers <Plenary Talk>2006
Author(s)
Tamio Endo, Atsuya Akiba, Atsushi Kamiya, Hirokazu O-oka, tatsuo Morimoto, Hong Zhu, Hirofumi Yamasaki^*, Kazuhiro Endo^*
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Journal Title
Beijing International Materials Week -International Conference on Superconducting Materials 2006 (Beijing, China), (06/6/27)
Description
「研究成果報告書概要(和文)」より
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[Journal Article] Microwave Absorption in LCMO/YBCO Superlattice2006
Author(s)
Hong Zhu, Atsuya Akiba, Atsushi Kamiya, Hirokazu O-oka, Tatsuo Morimoto, Hirofumi Yamasaki^*, Kazuhiro Endo^*, Tamio Endo, Jacobo Santamaria^*, Axel Hoffmann^*, Suzanne to Velthuis^*
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Journal Title
International Conference on Composites/Nano Engineering 2006 (Boulder, USA), (06/7/7)
Description
「研究成果報告書概要(和文)」より
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[Journal Article] Interaction between Abrikosov and Josephson Vortices Introduced by Microwave Magnetic Field and External Magnetic Field in Bi2212 Crystal : Vortex Dynamics under Crossing Field2006
Author(s)
Tamio Endo, Ajay K.Sarkar, Hong Zhu, Ken-ichi Nakanishi, Ayumu Nishio, Masanori Okada, Atsuya Akiba, Kazuhiro Endo
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Journal Title
Progress In Electromagnetics Research Symposium, (2006/3/26-29), Cambridge, USA, <Invited Lecture>
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Fabrication of YBCO and LBMO, and YBCO/LBMO Double Layers <Plenary Talk>2006
Author(s)
Tamio Endo, Atsuya Akiba, Atsushi Kamiya, Hirokazu O-oka, tatsuo Morimoto, Hong Zhu, Hirofumi Yamasaki, Kazuhiro Endo
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Journal Title
Beijing International Materials Week - International Conference on Superconducting Materials 2006 (Beijing, China), (06/6/27)
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Microwave Absorption in LCMO/YBCO Superlattice2006
Author(s)
Hong Zhu, Atsuya Akiba, Atsushi Kamiya, Hirokazu O-oka, Tatsuo Morimoto, Hirofumi Yamasaki, Kazuhiro Endo, Tamio Endo, Jacobo Santamaria, Axel Hoffmann, Suzanne to Velthuis
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Journal Title
International Conference on Composites/Nano Engineering 2006 (Boulder, USA), (06/7/7)
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Controls of a-c Orientation Growth of YBCO Thin Film Crystals for YBCO/Ferro Double Layered Tunable Microwave Filters2005
Author(s)
Tamio Endo, Masanori Okada, Hidetaka Nakashima, Ajay K.Sarkar, Atsuya Akiba, Atsushi Kamiya, Hong Zhu, Ken-ichi Nakanishi, Ayumu Nishio
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Journal Title
Proc. Tri-University International Joint Seminar and Symposium, (Zhenjiang, China)
Description
「研究成果報告書概要(和文)」より
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[Journal Article] Anisotropic Vortex Dynamics Related to Screening Currents and Microwave Currents under Magnetic Fields on High Tc Superconductors2005
Author(s)
Tamio Endo, Hong Zhu, Takahisa Sakurada, Ajay K.Sarkar, Masanori Okada, Atsuya Akiba, Hirofumi Yamasaki, Kazuhiro Endo
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Journal Title
Progress In Electromagnetics Research Symposium, (2005/8/22-26), Hangzhou, China, <Invited Lecture>
Description
「研究成果報告書概要(和文)」より
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[Journal Article] Controls of a-c Orientation Growth of YBCO Thin Film Crystals for YBCO/Ferro Double Layered Tunable Microwave Filters2005
Author(s)
Tamio Endo, Masanori Okada, Hidetaka Nakashima, Ajay K.Sarkar, Atsuya Akiba, Atsushi Kamiya, Hong Zhu, Ken-ichi Nakanishi, Ayumu Nishio
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Journal Title
Tri-University International Joint Seminar and Symposium, (2005/10/16-21), Zhenjiang, China, <Invited Lecture>
Description
「研究成果報告書概要(和文)」より
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[Journal Article] Phase Separation and Magnetostriction in LBMO Thin Films2005
Author(s)
Tamio Endo, Hong Zhu, Masanori Okada, Atsuya Akiba, Ken-ichi Nakanishi, Josep Nogues, Juan S. Munoz, Jose Colino
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Journal Title
International Conference on Optoelectronic Materials and Thin Films for Advanced Technology, (2005/10/24-27), Cochin, India, <Invited Lecture>
Description
「研究成果報告書概要(和文)」より
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[Journal Article] Double Layer Processes of LBMO/YBCO and Crystalline Degradations2005
Author(s)
Tamio Endo, Masanori Okada, Hidetaka Nakashima, Ajay K. Sarkar, Hong Zhu, Hirofumi Yamasaki, Kazuhiro Endo
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Journal Title
Materials Research Society Fall Meeting, (2005/11/28-12/2), Boston, USA, <Invited Lecture>
Description
「研究成果報告書概要(和文)」より
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[Journal Article] Interaction between Abrikosov and Josephson Vortices Introduced by Microwave Magnetic Field and External Magnetic Field in Bi2212 Crystal : Vortex Dynamics under Crossing Field2005
Author(s)
Tamio Endo, Ajay K.Sarkar, Hong Zhu, Ken-ichi Nakanishi, Ayumu Nishio, Masanori Okada, Atsuya Akiba, Kazuhiro Endo
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Journal Title
Progress In Electromagnetics Research Symposium, (2006/3/26-29), Cambridge, USA, <Invited Lecture>
Description
「研究成果報告書概要(和文)」より
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[Journal Article] Anisotropic Vortex Dynamics Related to Screening Currents and Microwave Currents under Magnetic Fields on High Tc Superconductors2005
Author(s)
Tamio Endo, Hong Zhu, Takahisa Sakurada, Ajay K.Sarkar, Masanori Okada, Atsuya Akiba, Hirofumi Yamasaki, Kazuhiro Endo
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Journal Title
Progress In Electromagnetics Research Symposium, Hangzhou, China, <Invited Lecture>
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Controls of a-c Orientation Growth of YBCO Thin Film Crystals for YBCO/Ferro Double Layered Tunable Microwave Filters2005
Author(s)
Tamio Endo, Masanori Okada, Hidetaka Nakashima, Ajay K.Sarkar, Atsuya Akiba, Atsushi Kamiya, Hong Zhu, Ken-ichi Nakanishi, Ayumu Nishio
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Journal Title
Tri-University International Joint Seminar and Symposium, Zhenjiang, China, <Invited Lecture>
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Phase Separation and Magnetostriction in LBMO Thin Films2005
Author(s)
Tamio Endo, Hong Zhu, Masanori Okada, Atsuya Akiba, Ken-ichi Nakanishi, Josep Nogues, Juan S. Munoz, Jose Colino
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Journal Title
International Conference on Optoelectronic Materials and Thin Films for Advanced Technology, Cochin, India, <Invited Lecture>
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Double Layer Processes of LBMO/YBCO and Crystalline Degradations2005
Author(s)
Tamio Endo, Masanori Okada, Hidetaka Nakashima, Ajay K.Sarkar, Hong Zhu, Hirofumi Yamasaki, Kazuhiro Endo
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Journal Title
Materials Research Society Fall Meeting, (2005/11/28-12/2), Boston, USA, <Invited Lecture>
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Controls of a-c Orientation Growth of YBCO Thin Film Crystals for YBCO/Ferro Double Layered Tunable Microwave Filters2004
Author(s)
Tamio Endo, Kouji Yoshii, Takahisa Sakurada, Michi Ogata, Ajay K. Sarkar, Masanori Okada, Hidetaka Nakashima
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Journal Title
International Workshop on Crystal Growth and Characterization of Technologically Important Materials, (2004/2/24-28), Chennai, India,<Invited>
Description
「研究成果報告書概要(和文)」より
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[Journal Article] LBMO Thin Film Fabrication and Nano Double Structures, and Microwave Magnetic Properties2003
Author(s)
Tamio Endo, Kouji Yoshii, Michi Ogata, Takahisa Sakurada, Josep Nogues^*, Jose Colino^*
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Journal Title
International Conference on Composites/Nano Engineering, (2003/7/20-26), New Orleans, USA, <Invited>
Description
「研究成果報告書概要(和文)」より
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[Journal Article] Persistent Photoconductivity in High-Tc Superconductors2003
Author(s)
Axel Hoffmann^*, Tamio Endo, Jacobo Santamaria^*, Z.F.Ren^*, J.Y.Lao^*, J.H. Wang^*, Ivan K. Schuller^*
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Journal Title
The 8th IUMRS International Conference on Advanced Materials, (2003/10/8-13), Yokohama,Japan, <Invited>
Description
「研究成果報告書概要(和文)」より
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[Journal Article] Electrical and Magnetic Properties of La(Ba)MnO3 Thin Films2003
Author(s)
Tamio Endo, Kouji Yoshii, Takahisa Sakurada, Michi Ogata, Ajay K. Sarkar, Josep Nogues^*, Juan S.Munos^*, Jose Colino^*
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Journal Title
Twelfth International Workshop on The Physics of Semiconductor Devices, (2003/12/16-20),Chennai, India, <Invited>
Description
「研究成果報告書概要(和文)」より
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[Journal Article] Perovskite Oxide Thin Film Growth and Double Layers Stackings2003
Author(s)
Tamio Endo, Kouji Yoshii, Takahisa Sakurada, Michi Ogata, Ajay K. Sarkar, Masanori Ogata, Hidetaka Nakashima
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Journal Title
International Workshop on Crystal Growth and Characterization of Technologically Important Materials, (2004/2/24-28), Chennai, India,<Invited Lecture>
Description
「研究成果報告書概要(和文)」より
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[Journal Article] Electrical and Magnetic Properties of La(Ba)Mn03 Thin Films2003
Author(s)
Tamio Endo, Kouji Yoshii, Takahisa Sakurada, Michi Ogata, Ajay K. Sarkar, Josep Nogues, Juan S. Munos, Jose Colino
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Journal Title
Twelfth International Workshop on The Physics of Semiconductor Devices, Chennai, India, <Invited>
Description
「研究成果報告書概要(欧文)」より
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