Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Takeshi Obokata"'
Publikováno v:
Applied optics. 20(15)
This paper introduces a compact polarization-independent optical circulator for communications using multimode optical fibers. This circulator consists of two pairs of rutile prisms used as polarization separators, a YIG Faraday rotator, a ring-shape
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9218f796095b73656905849c19875032
https://pubmed.ncbi.nlm.nih.gov/20333018
https://pubmed.ncbi.nlm.nih.gov/20333018
Publikováno v:
Journal of Applied Physics. 57:1182-1185
The two‐dimensional microscopic uniformity of resistivity has been studied using the three‐electrode guard method with 70‐μm resolution as a new microscopic characterization technique for semi‐insulating GaAs. A clear microscopic correlation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67dc0543ed8117ed0e3067be570ef654
https://doi.org/10.1063/1.334513
https://doi.org/10.1063/1.334513
Publikováno v:
Journal of Applied Physics. 61:1469-1474
The relationship between the infrared absorption coefficient and the resistivity was examined experimentally in undoped and In‐doped liquid‐encapsulated Czochralski grown semi‐insulating GaAs. The resistivity increases from ∼106 to 5×108 Ω
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b0182600848b5f3ad8cba39420e1436
https://doi.org/10.1063/1.338078
https://doi.org/10.1063/1.338078
Publikováno v:
Journal of Crystal Growth. 84:394-398
The properties of high pulling rate (20–27 mm/h) LEC GaAs single crystals under a magnetic field are investigated by using the infrared absorption coefficient, α, at a wavelength of 1.0 μm, the microscopic resistivity and the Hall measurement tec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fcf295a5548b008c790e185681d9a77d
https://doi.org/10.1016/0022-0248(87)90266-1
https://doi.org/10.1016/0022-0248(87)90266-1
Publikováno v:
Journal of Applied Physics. 48:2604-2607
Bubble collapse fields in several kinds of garnet films ion implanted for hard‐bubble suppression were measured in the presence of an in‐plane magnetic field and were found to vary according to the direction of the in‐plane field. That is, bubb
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14159a893a31e48e8e1c386a353cd0f5
https://doi.org/10.1063/1.323983
https://doi.org/10.1063/1.323983
Autor:
Takeshi Obokata, Takehiko Oguchi
Publikováno v:
Journal of the Physical Society of Japan. 25:322-330
The one-dimensional Ising model is investigated by generalizing the Bethe approximation, which, in this case, gives exact solutions. The energy, specific heat and the zero field susceptibility for S =1, 3/2 and 2 except the susceptibility for S =2 ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9dabdda38b9b01dfb0d0e855d39e1294
https://doi.org/10.1143/jpsj.25.322
https://doi.org/10.1143/jpsj.25.322
Autor:
Takeshi Obokata, Takehiko Oguchi
Publikováno v:
Journal of the Physical Society of Japan. 27:1111-1116
The variation of the critical temperature (the Curie or Neel temperature) of a magnetic crystal randomly diluted with non-magnetic atoms is evaluated as a function of concentration p of magnetic atoms by the effective Hamiltonian method based on the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::24de07409bcbc3caf5471c13ffd5bde1
https://doi.org/10.1143/jpsj.27.1111
https://doi.org/10.1143/jpsj.27.1111
Autor:
Takeshi Obokata
Publikováno v:
Journal of the Physical Society of Japan. 26:895-900
Glauber's one-dimensional Ising model is extended to the case of spin S =1 by developing the time-dependent constant coupling approximation. It is shown that there exist two relaxation times. The one increases monotonically with decreasing temperatur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4165c97a2d267facf3d4f5aaf597be47
https://doi.org/10.1143/jpsj.26.895
https://doi.org/10.1143/jpsj.26.895
Publikováno v:
Journal of the Physical Society of Japan. 23:516-521
The Heisenberg model, the Ising model and the x y model in ferromagnetism are treated within a unified scheme. The exchange interaction between nearest neighboring spins i and j is -( J /2)[ a σ i z σ j z + b (σ i x σ j x +σ i y σ j y )], where
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f28eb392877e8c39fd5be40ffa09e03a
https://doi.org/10.1143/jpsj.23.516
https://doi.org/10.1143/jpsj.23.516
Publikováno v:
Journal of Applied Physics. 62:4316-4318
Effects of carbon concentration on the electrical properties of liquid‐encapsulated Czochralski semi‐insulating GaAs crystals are investigated quantitatively for the first time by keeping other parameters such as melt stoichiometry, EL2 concentra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::70f802195a29960550b2c635bd0e298b
https://doi.org/10.1063/1.339835
https://doi.org/10.1063/1.339835