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Chen, H. F.*; Liu, B. X.*; Xu, P. G.; Fang, W.*; Tong, H. C.*; Yin, F. X.*
Journal of Materials Research and Technology, 32, p.3060 - 3069, 2024/09
Times Cited Count:0 Percentile:0.00(Materials Science, Multidisciplinary)Takanashi, Koki; Seki, Takeshi*
Magune, 19(3), p.100 - 106, 2024/06
Perpendicular magnetic anisotropy of thin films currently plays an important role in spintronics as well as magnetic recording. Regarding perpendicular magnetic anisotropy, in this article, the fundamentals, the research history, and the recent research trends are reviewed, showing specific examples with perpendicular magnetization such as magnetic multilayers, ordered alloy films, rare earth-transition metal amorphous alloy films, and inhomogeneous or granular films. The physical origins for perpendicular magnetic anisotropy, including interface anisotropy due to structural symmetry breaking, magnetoelastic anisotropy due to strain, bulk-type magnetocrystalline anisotropy, and directional pair ordering of atoms, are discussed in each example.
Pirozhkov, A. S.; Ragozin, E. N.*
Physics-Uspekhi, 58(11), p.1095 - 1105, 2015/11
Times Cited Count:32 Percentile:58.51(Physics, Multidisciplinary)Imazono, Takashi; Yanagihara, Mihiro*
Photon Factory News, 22(3), p.18 - 22, 2004/11
Using soft-X-ray fluorescence spectroscopy with photon incidence at a critical angle of total reflection, it was made clear that SiO existed within a depth of a few nanometers from the surface of Fe/Si multilayers. It was generated by oxidation of the interdiffused Fe
Si layer nearest to the topmost Fe layer. Consequently, the Fe
Si layer was found to decrease in thickness. This result suggests that the total-reflection soft-X-ray fluorescence spectroscopy is fairly useful to analyze the chemical state of elements to a depth of a few nanometers from the surface.
Takeda, Masayasu; Mibu, Ko*; Shinjo, Teruya*; Endo, Yasuo*; Suzuki, Junichi
Physical Review B, 70(10), p.104408_1 - 104408_9, 2004/09
Times Cited Count:8 Percentile:40.37(Materials Science, Multidisciplinary)Detailed magnetic structure of spin-density waves (SDWs) in epitaxial Cr(001)/Sn multilayer was investigated by neutron scattering combined with Mssbauer spectroscopic studies. Monatomic Sn layers were embedded in 240 nm thick Cr(001) films with varying the periodic spacing from 4.2 to 16.2 nm. All samples were revealed to be a commensurate antiferromagnetic (CAF) phase at 300 K. The CAF structures changed to incommensurate SDW states with complex waveforms whose wavelength are controlled by the artificial periodicity at low temperatures although the CAF structure in the sample with the period of 4.2 nm persisted even at 10 K. The phase transition depends on the thickness of the Cr layers intervening between Sn monatomic layers. An appreciable phase slip in the SDW was observed during the phase transition in the sample with the period of 10.2 nm. The SDW structure is discussed by taking account of the competing forces between the nesting of Fermi surface and a pinning of antinodes at the Sn monatomic layers.
Jiko, Norihiro*; Almokhtar, M.*; Takeda, Masayasu; Suzuki, Junichi; Shinjo, Teruya*; Mibu, Ko*
Journal of Magnetism and Magnetic Materials, 272-276(Part2), p.1233 - 1234, 2004/05
The growth-orientation dependence of magnetism of Cr/Sn and Fe/Cr/Sn/Cr multilayers was studied. For Fe/Cr/Sn/Cr multilayers, reduction of Cr magnetic moments was found in both (011)- and (001)-orientated samples, and the effect is larger in the former than the latter. In Cr/Sn multilayers, the (011)-oriented sample with the Cr layer thickness () of 80
80AA have a spin-density-wave structure with the wave vector perpendicular to the film plane.
Soyama, Kazuhiko; Cao, B.*
JAERI-Research 2003-031, 42 Pages, 2004/03
We have established a model to analyze the diffuse neutron scattering for Ni/Ti multilayers with DWBA calculation. Three kind of scan type have been adopted to investigate the features of the scattered intensities. Good agreement between the measurement around rocking scan and the calculation following the concept of DWBA has been achieved in this paper.
Shiwaku, Hideaki; Mitsui, Takaya; Tozawa, Kazukiyo*; Kiriyama, Koji*; Harami, Taikan; Mochizuki, Tetsuro*
AIP Conference Proceedings 705, p.659 - 662, 2004/00
We developed a multi-crystal switching system on a cryogenically cooled monochromator of JAERI materials science beamline, BL11XU. In order to study our science, it is necessary for ensuring at least the energy range of 6 - 70keV to employ Si(111) and Si(311) crystals. The principle of the crystal switching is that, two pair of crystals is arranged side by side, and they are translated in horizontal direction for exchanging. Indium sheets were inserted between both sides of crystals in order to improve thermal contact. Some adjustment stages of the monochromator were removed to avoid the crystal vibration and a sheet heater was installed on an X-axis stage to prevent over-cooling of X-axis stages. The monochromator is under commissioning at present. In comparison with a previous indirect water cooling diamond (111) crystal monochromator, this monochromator provides high flux intensity from 4 times to 7 times. It takes only 5 minutes to exchange and adjust crystals geometry. This mechanism will be easily applied to other crystals, for example asymmetrical-cut crystals.
Ono, Tomio*; Subekti, M.*; Maruyama, Yuta*; Nabeshima, Kunihiko; Kudo, Kazuhiko*
Dai-13-Kai Interijento, Shisutemu, Shimpojiumu Koen Rombunshu, p.212 - 217, 2003/12
In this research, we present nuclear power plant simulation method using Multilayer Perceptron, which is one of the models of Artificial Neural Networks(ANNs). The major characteristics of ANNs are to obtain the model through learning, analogy and very high speed processing. Furthermore, 'time synchronizing signal' and 'progress synchronizing signal' are added as the inputs to adapt the abnormal events with various scales or progress rates. This ANN, learned some sample data, can be flexibly adapted to simulate the abnormal events with different scales including explicit progress rates. In the verification using PWR simulator, we confirmed that this method could model NPP abnormal events by learning data and simulate the data which have different progress rates from learning data.
Takeda, Masayasu; Torikai, Naoya*; Ino, Takashi*; Tasaki, Seiji*
KENS Report-XIV, p.205 - 206, 2003/00
no abstracts in English
Yamaki, Tetsuya; Asai, Keisuke*
Langmuir, 17(9), p.2564 - 2567, 2001/05
Times Cited Count:42 Percentile:92.04(Chemistry, Multidisciplinary)A new type of TiO nanosheet-organic complex multilayer film was successfully prepared by the Langmuir-Blodgett technique. Surface pressure-area curves demonstrated that a stable monolayer of dioctadecyldimethylammonium bromide (DODAB) was formed on an aqueous suspension of TiO
nanosheets derived from an exfoliated layered titanate, H
Ti
□
O
・H
O (x
0.7; □, vacancy). The hybrid monolayer of the ammonium amphiphiles and the TiO
nanosheet was quantitatively transferred onto a hydrophobic quartz plate to form a multilayer film. X-ray diffraction measurements confirmed the formation of an ordered structure of DODAB/TiO
with an interlayer distance of 3.4 nm.
Soyama, Kazuhiko; Murakami, Katsuhiko*
JAERI-Conf 2001-002, p.551 - 556, 2001/03
no abstracts in English
Bin, C.; Soyama, Kazuhiko
JAERI-Conf 2001-002, p.592 - 599, 2001/03
no abstracts in English
Ulyanenkov, A.*; Matsuo, R.*; Omote, Kazuhiko*; Inaba, Katsuhiko*; Harada, Jimpei*; Ishino, Masahiko; Nishii, Masanobu; Yoda, Osamu
Journal of Applied Physics, 87(10), p.7255 - 7260, 2000/05
Times Cited Count:33 Percentile:75.97(Physics, Applied)no abstracts in English
Yoshida, Hidetoshi; Naito, Osamu; Yamashita, Osamu; Kitamura, Shigeru; ; ; ; ; Hatae, Takaki; Nagashima, Akira; et al.
Review of Scientific Instruments, 70(1), p.751 - 754, 1999/01
Times Cited Count:16 Percentile:69.67(Instruments & Instrumentation)no abstracts in English
Soyama, Kazuhiko
Radioisotopes, 46(11), p.852 - 858, 1997/11
no abstracts in English
Soyama, Kazuhiko; Metoki, Naoto; Minakawa, Nobuaki; ;
Hamon, 7(2), p.5 - 7, 1997/05
no abstracts in English
Yoshida, Hidetoshi; Naito, Osamu; Yamashita, Osamu; Kitamura, Shigeru; Hatae, Takaki; Nagashima, Akira
JAERI-Research 96-061, 20 Pages, 1996/11
no abstracts in English
Soyama, Kazuhiko; Metoki, Naoto; Minakawa, Nobuaki; Morii, Yukio; ;
Journal of the Physical Society of Japan, 65(A), p.133 - 135, 1996/00
no abstracts in English
Kugo, Teruhiko; Nakagawa, Masayuki
PHYSOR 96: Int. Conf. on the Physics of Reactors, 1, p.B73 - B81, 1996/00
no abstracts in English