2006 Fiscal Year Final Research Report Summary
Molecular Spinics of Sub-Micron Scale Super Lattices composed of Ferromagnetic Thin Films and Gigantic Single Molecules with Open-Shell Structure
| Project/Area Number |
15087209
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| Research Category |
Grant-in-Aid for Scientific Research on Priority Areas
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | Osaka City University |
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Principal Investigator |
TAKUI Takiji Grasuate School of Science, Departments of Chemistry and Materials Science, Univ., Affiliated Professor, 大学院理学研究科, 特任教授 (10117955)
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| Co-Investigator(Kenkyū-buntansha) |
SATO Kazunobu Osaka City University, Graduate School of Science, Departments of Chemistry and Materials Science, Professor, 大学院理学研究科, 教授 (90264796)
SHIOMI Daisuke Osaka City University, Graduate School of Science, Departments of Chemistry and Materials Science, Associate Professor, 大学院理学研究科, 助教授 (40260799)
TOYATAA Kazuo Osaka City University, Graduate School of Science, Departments of Chemistry and Materials Science, Associate Professor, 大学院理学研究科, 講師 (60347482)
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| Project Period (FY) |
2003 – 2006
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| Keywords | Magnetism / Spin electronics / Atomic and molecular manipulation / Quantum thin wire / Micro resonator / Quantum computer / Quantum information processing |
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| Research Abstract |
The project "Molecular Spinics of Sub-Micron Scale Super Lattices composed of Ferromagnetic Thin Films and Gigantic Single Molecules with Open-Shell Structure" aims to develop electron-spin mediated exotic functionalities and to characterize their features in terms of microscopic details, emphasizing (1) the introduction of novel magnetic materials or entities such as super lattices fabricated from ferromagnetic thin films in semi-microscopic scale and (2) gigantic single molecules featuring exotic molecular spin properties. The main line of the research is intended to connect with the extension of electron-spin mediated spin science and spin technology, particularly introducing molecular spin quantum computers as the latest application of molecular spins from the viewpoint of materials challenge and the establishment of "true" spin manipulation technology.
Referred to spin dynamics of the super lattices composed of ferromagnetic thin films, we have for the first time found a "lateral W
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alker mode" and "Gigantic Dioplar Spin Wave" as novel quantum spin waves from the super lattice. Both waves intrinsically originate from ferromagnetic super lattice structures of the thin film. The former arises also from a single square wire fabricated of the ferromagnetic thin film in a micron scale. Remarkable angular dependence of the ferromagnetic resonance spectra from the single wire was analyzed at X-band and ambient temperature, yielding the magnetic tensor parameters relevant to electron-dipolar long-range interactions in microscopic scale. Our results agree with those from the Brilloun scattering experiments. Notably, the appearance of the gigantic dipolar spin wave phenomena depends on the number of the assemblies of the super lattice cells aligned in one or two dimension, suggesting the existence of thresholds for super lattice structures and their intrinsic spin properties. Assuming the quantization conditions, we have calculated the appearance conditions of the dipolar spin wave as a function of the number with the help of the experimentally acquired magnetic data. Pant's theory has been invoked to interpret the experimentally derived magnetic parameters, enabling us to calculate magnetic dipolar interactions in one dimension. Interestingly, the dipolar spin wave reveals non-linear behavior with increased microwave power on resonance. calculating, in which. made ESR spectrometer
We have developed and established microwave and radiofrequency spin manipulation technology by implementing molecular spin quantum computers. This technology includes the manipulation of quantum phases of molecular electron spin and nuclear spins in Bloch space, which enables us to establish quantum entanglement between the spins : Establishment of the entanglement is the central issue of quantum computers and quantum information processing. From the experimental side, we have created bipartite entanglement and pseudo tripartite one by the use of extremely stable organic open-shell entities, in which particular nucleus is isotope-labeled. Our spin manipulation technology invokes time proportional phase incrementation for both electron spin and nuclear spin, simultaneously. In this project, we have for the first time shown the spinor intrinsic to electron spin, explicitly from the experimental side. Less
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[Journal Article] One-electron reduction of kinetically stabilized dipnictenes : Synthesis of dipnictene anion radicals2006
Author(s)
T.Sasamori, * E.Mieda, N.Nagahora, K.Sato, D.Shiomi, T.Takui, Y.Hosoi, Y.Furukawa, N.Takagi, S.Nagase, N.Tokitoh
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Journal Title
J. Am. Chem. Soc. 128
Pages: 12582-12588
Description
「研究成果報告書概要(欧文)」より
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