In this paper, we describe an application of the p-valued input, q-valued output threshold elements (2 equal to or less than p, 3 equal to or less than p), namely (p,q)-logical elements, to the...
Role of charge carriers for ferromagnetism in cobalt-doped rutile TiO2 (2008)
Fukumura, T, Toyosaki, H, Ueno, K, Nakano, M, Kawasaki, M
Electric and magnetic properties of a high temperature ferromagnetic oxide semiconductor, cobalt-doped rutile TiO2, are summarized. The cobalt-doped rutile TiO2 epitaxial thin films with different...
Mamiya, K., Koide, T., Fujimori, A., Tokano, H., Manaka, H., Tanaka, A., ...
Soft x-ray magnetic circular dichroism (XMCD) measurements at the Co L2,3 edges of Co doped rutile TiO2 at room temperature have revealed clear multiplet features characteristic of ferromagnetic Co2+...
Quilty, J. W., Shibata, A., Son, J. -Y., Takubo, K., Mizokawa, T., Toyosaki, H., ...
X-ray photoemission spectroscopy measurements were performed on thin-film samples of rutile Ti_{1-x}Co_{x}O_{2-delta} to reveal the electronic structure. The Co 2p core level spectra indicate that...
A ferromagnetic oxide semiconductor as spin injection electrode in magnetic tunnel junction (2005)
Toyosaki, H., Fukumura, T., Ueno, K., Nakano, M., Kawasaki, M.
A magnetic tunnel junctions composed of room temperature ferromagnetic semiconductor rutile Ti1-xCoxO2-d and ferromagnetic metal Fe0.1Co0.9 separated by AlOx barrier showed positive tunneling...
Magnetic oxide semiconductors (2005)
Fukumura, T., Toyosaki, H., Yamada, Y.
Magnetic oxide semiconductors, oxide semiconductors doped with transition metal elements, are one of the candidates for a high Curie temperature ferromagnetic semiconductor that is important to...
Toyosaki, H., Fukumura, T., Yamada, Y., Kawasaki, M.
Magnetic circular dichroism (MCD) of rutile Ti1-xCoxO2-d is systematically examined with various x and d to reveal a phase diagram for the appearance of ferromagnetism at higher carrier concentration...
Spin-related magnetoresistance of n-type ZnO:Al and Zn_{1-x}Mn_{x}O:Al thin films (2005)
Andrearczyk, T., Jaroszynski, J., Grabecki, G., Dietl, T., Fukumura, T., Kawasaki, M.
Effects of spin-orbit coupling and s-d exchange interaction are probed by magnetoresistance measurements carried out down to 50 mK on ZnO and Zn_{1-x}Mn_{x}O with x = 3 and 7%. The films were...
Modeling and simulation of polycrystalline ZnO thin-film transistors (2003)
Hossain, Faruque M., Nishii, J., Takagi, S., Ohtomo, A., Fukumura, T., Fujioka, H., ...
Thin film transistors (TFTs) made of transparent channel semiconductors such as ZnO are of great technological importance, because their insensitivity to visible light makes device structures simple....
Toyosaki, H., Fukumura, T., Yamada, Y., Nakajima, K., Chikyow, T., Hasegawa, T., ...
A ferromagnetic semiconductor, rutile (Ti,Co)O2, exhibits anomalous Hall effect at room temperature. Strong dependence of the anomalous Hall effect, as well as the magneto-optic response, on the...
Exploration of oxide-based diluted magnetic semiconductors toward transparent spintronics (2003)
Fukumura, T., Yamada, Y., Toyosaki, H., Hasegawa, T., Koinuma, H., Kawasaki, M.
A review is given for the recent progress of research in the field of oxide-based diluted magnetic semiconductor (DMS), which was triggered by combinatorial discovery of transparent ferromagnet. The...
Magneto-Optical Spectroscopy of Anatase TiO2 Doped with Co (2002)
Fukumura, T., Yamada, Y., Tamura, K., Nakajima, K., Aoyama, T., Tsukazaki, A., ...
Magneto-optical spectroscopy of a transparent ferromagnetic semiconductor, anatase TiO2 doped with Co, is carried out at room temperature. A large magneto-optical response with ferromagnetic field...
Localizing the replication origin region on the physical map of the Mycoplasma capricolum genome.
Miyata, M, Wang, L, Fukumura, T
Four lines of evidence argue that the replication origin of the Mycoplasma capricolum genome lies within the 46-kb BamHI fragment bordered by two BamHI sites of the total of nine BamHI sites that...
Miyata, M, Sano, K, Okada, R, Fukumura, T
The homolog of the dnaA gene, which has been reported to be present in the vicinity of the initiation site of replication in the genome of Mycoplasma capricolum (M.Miyata, L.Wang, and T.Fukumura, J....
Localizing the replication origin region on the physical map of the Mycoplasma capricolum genome.
Miyata, M, Wang, L, Fukumura, T
Four lines of evidence argue that the replication origin of the Mycoplasma capricolum genome lies within the 46-kb BamHI fragment bordered by two BamHI sites of the total of nine BamHI sites that...
Miyata, M, Sano, K, Okada, R, Fukumura, T
The homolog of the dnaA gene, which has been reported to be present in the vicinity of the initiation site of replication in the genome of Mycoplasma capricolum (M.Miyata, L.Wang, and T.Fukumura, J....
Otsuka, M, Ichiya, Y, Hosokawa, S, Kuwabara, Y, Tahara, T, Fukumura, T, ...
Striatal blood flow, glucose metabolism and 18F-Dopa uptake were studied with positron emission tomography (PET) in eight non-demented patients with idiopathic Parkinson's disease and eight with...