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Journal Articles

A Study on convection in molten zone of aluminum alloy during Fe/Al resistance spot welding

Iyota, Muneyoshi*; Matsuda, Tomoki*; Sano, Tomokazu*; Shigeta, Masaya*; Shobu, Takahisa; Yumoto, Hirokatsu*; Koyama, Takahisa*; Yamazaki, Hiroshi*; Semba, Yasunori*; Ohashi, Haruhiko*; et al.

Journal of Manufacturing Processes, 94, p.424 - 434, 2023/05

 Times Cited Count:3 Percentile:80.08(Engineering, Manufacturing)

Journal Articles

Uniaxial-pressure control of magnetic phase transitions in a frustrated magnet CuFe$$_{1-x}$$Ga$$_{x}$$O$$_{2}$$ (x =0, 0.018)

Nakajima, Taro*; Mitsuda, Setsuo*; Takahashi, Keiichiro*; Yoshitomi, Keisuke*; Masuda, Kazuya*; Kaneko, Chikafumi*; Homma, Yuki*; Kobayashi, Satoru*; Kitazawa, Hideaki*; Kosaka, Masashi*; et al.

Journal of the Physical Society of Japan, 81(9), p.094710_1 - 094710_8, 2012/09

Journal Articles

Uniaxial-pressure control of magnetic phase transitions in a frustrated magnet CuFe$$_{1-x}$$Ga$$_{x}$$O$$_{2}$$ ($$x$$ = 0, 0.018)

Nakajima, Taro*; Mitsuda, Setsuo*; Takahashi, Keiichiro*; Yoshitomi, Keisuke*; Masuda, Kazuya*; Kaneko, Chikafumi*; Homma, Yuki*; Kobayashi, Satoru*; Kitazawa, Hideaki*; Kosaka, Masashi*; et al.

Journal of the Physical Society of Japan, 81(9), p.094710_1 - 094710_8, 2012/09

 Times Cited Count:13 Percentile:63.06(Physics, Multidisciplinary)

Journal Articles

Anisotropic spin freezing in lightly-doped La$$_{2-x}$$Sr$$_x$$CuO$$_4$$

Matsuda, Masaaki; Fujita, Masaki*; Takeda, Masayasu; Kakurai, Kazuhisa; Yamada, Kazuyoshi*

Physica C, 470(Suppl.1), p.S82 - S83, 2010/12

 Times Cited Count:1 Percentile:6.44(Physics, Applied)

Journal Articles

Spiral spin structures and origin of the magnetoelectric coupling in YMn$$_2$$O$$_5$$

Kim, J.-H.*; Lee, S.-H.*; Park, S. I.*; Kenzelmann, M.*; Harris, A. B.*; Schefer, J.*; Chung, J.-H.*; Majkrzak, C. F.*; Takeda, Masayasu; Wakimoto, Shuichi; et al.

Physical Review B, 78(24), p.245115_1 - 245115_10, 2008/12

 Times Cited Count:41 Percentile:80.63(Materials Science, Multidisciplinary)

Journal Articles

Spiral spin structure in the Heisenberg pyrochlore magnet CdCr$$_2$$O$$_4$$

Matsuda, Masaaki; Takeda, Masayasu; Nakamura, Mitsutaka; Kakurai, Kazuhisa; Osawa, Akira*; Leli$`e$vre-Berna, E.*; Chung, J.-H.*; Ueda, Hiroaki*; Takagi, Hidenori*; Lee, S.-H.*

Physical Review B, 75(10), p.104415_1 - 104415_6, 2007/03

 Times Cited Count:43 Percentile:81.58(Materials Science, Multidisciplinary)

A frustrated spinel CdCr$$_2$$O$$_4$$ undergoes a three-dimensional spin-Peierls transition at $$T_N$$ = 7.8 K from a cubic paramagnetic to a tetragonal N$'e$el state. The N$'e$el state has a spiral magnetic structure with a characteristic wave vector of $$(0,delta,1)$$ when the $$c$$ axis elongated. Here we report our spherical neutron polarimetry experiments to investigate the spiral spin structure in detail. Our results indicate that the spins lie in the $$ac$$ plane perpendicular to the direction of the spiral modulation. We also found that the spiral structure in the $$ac$$ plane is elliptical with the $$c$$-component larger by $$sim$$24% than the $$a$$-component, suggesting a strong coupling between the magnetic structure and structural distortion. Unpolarized neutron diffraction under an external magnetic field has also been performed. The magnetic field dependence suggests existence of magnetic anisotropy in the N$'e$el state, which is consistent with our previous inelastic studies.

Journal Articles

Polarized neutron scattering study of the CuO$$_{2}$$ chains in Ca$$_{2}$$Y$$_{2}$$Cu$$_{5}$$O$$_{10}$$

Matsuda, Masaaki; Nakamura, Mitsutaka; Takeda, Masayasu*; Kakurai, Kazuhisa; Yamaguchi, Hirotaka*; Ito, Toshimitsu*; Oka, Kunihiko*

Physica B; Condensed Matter, 329-333(1-4), p.711 - 712, 2003/05

 Times Cited Count:0 Percentile:0.00(Physics, Condensed Matter)

no abstracts in English

Journal Articles

ELM control and boundary plasma modification in the JFT-2M tokamak

Tamai, Hiroshi; Shoji, Teruaki; Miura, Yukitoshi; Nagashima, Keisuke; Kawashima, Hisato; Matsuda, Toshiaki; Ogawa, Hiroaki; Maeno, Masaki; Yamauchi, Toshihiko; Uehara, Kazuya; et al.

IAEA-CN-60/A1-7, 0, p.137 - 144, 1995/00

no abstracts in English

Journal Articles

Multi-ampere negative hydrogen ion source for fusion application

Inoue, Takashi; Araki, Masanori; Hanada, Masaya; Kurashima, Toru*; Matsuda, Shinzaburo; ; Ohara, Yoshihiro; Okumura, Yoshikazu; Tanaka, Shigeru; Watanabe, Kazuhiro

Nuclear Instruments and Methods in Physics Research B, 37-38, p.111 - 115, 1989/00

 Times Cited Count:27 Percentile:91.59(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Multi-ampere H$$^{-}$$beam production in a volume ion source

Watanabe, Kazuhiro; Araki, Masanori; Hanada, Masaya; Horiike, Hiroshi; Inoue, Takashi; Kurashima, Toru*; Matsuda, Shinzaburo; ; Ohara, Yoshihiro; Okumura, Yoshikazu; et al.

12th Symp. on Fusion Engineering, p.302 - 305, 1987/00

no abstracts in English

Oral presentation

Magnetic structure of TbMnO$$_3$$ studied with spherical neutron polarimetry

Kajimoto, Ryoichi; Matsuda, Masaaki; Wakimoto, Shuichi; Takeda, Masayasu; Kakurai, Kazuhisa; Mitsui, Yukari*; Yoshizawa, Hideki*

no journal, , 

Oral presentation

Detailed analysis of magnetic and crystalline structure of multiferroic CuFe$$_{1-x}$$Ga$$_{x}$$O$$_{2}$$ by means of CRYOPAD and RXS

Kaneko, Chikafumi*; Nakajima, Taro*; Mitsuda, Setsuo*; Terada, Noriki*; Wakimoto, Shuichi; Takeda, Masayasu; Kakurai, Kazuhisa; Tanaka, Yoshikazu*

no journal, , 

no abstracts in English

Oral presentation

Imaging test of the 3-D gamma-ray distribution in KUR reactor room using Electron-Tracking Compton Camera (ETCC)

Sonoda, Shinya*; Takada, Atsushi*; Tanimori, Toru*; Tsuda, Masaya*; Tahara, Keisuke*; Kobayashi, Koichiro*; Tanigaki, Minoru*; Taniguchi, Akihiro*; Nagai, Haruyasu; Nakayama, Hiromasa; et al.

no journal, , 

We have developed an Electron Tracking Compton Camera (ETCC), which provides a well-defined Point Spread Function (PSF) by reconstructing a direction of each gamma as a point and realizes simultaneous measurement of brightness and spectrum of MeV gamma-rays. Here, we present the results of the gamma-imaging-spectroscopy with ETCC tested at the research reactor at the Institute for Integrated Radiation and Nuclear Science, Kyoto University.

Oral presentation

Spiral structure of a frustrated spinel CdCr$$_2$$O$$_4$$ studied by polarized neutron techniques

Matsuda, Masaaki; Osawa, Akira*; Takeda, Masayasu; Nakamura, Mitsutaka; Leli$`e$vre-Berna, E.*; Kakurai, Kazuhisa; Chung, J.-H.*; Lee, S.-H.*; Ueda, Hiroaki*; Takagi, Hidenori*

no journal, , 

no abstracts in English

Oral presentation

Magnetic Structure of a Frustrated Spinel CdCr$$_{2}$$O$$_{4}$$

Matsuda, Masaaki; Osawa, Akira*; Takeda, Masayasu; Nakamura, Mitsutaka; Kakurai, Kazuhisa; Leli$`e$vre-Berna, E.*; Chung, J.-H.*; Lee, S.-H.*; Ueda, Hiroaki*; Takagi, Hidenori*

no journal, , 

no abstracts in English

Oral presentation

Polarized neutron scattering study of spin dynamics in La$$_{2-x}$$(Sr,Ba)$$_{x}$$CuO$$_{4}$$

Wakimoto, Shuichi; Kakurai, Kazuhisa; Matsuda, Masaaki; Takeda, Masayasu; Fujita, Masaki*; Yamada, Kazuyoshi*; Gu, G.*; Tranquada, J. M.*; Birgeneau, R. J.*; Zhang, H.*

no journal, , 

Polarized neutron scattering exaperiments have been performed on La$$_{1.875}$$Ba$$_{0.125}$$CuO$$_{4}$$ and La$$_{1.92}$$Sr$$_{0.08}$$CuO$$_{4}$$ with intent to elucidate a possible effects of stripe structure to the spin dynamics. Low energy ($$omega = 4$$ meV) data demonstratre that in the former sample, which has a well-ordered stripe state with Cu spins lying in the CuO$$_2$$ plane at 10 K, spins fluctuate only in the plane. On the other hand, the latter sample, which has very weak stripe order, shows isotropic spin fluctuation. This implies that low energy magnetic excitations are stringly affected by the stripe order.

Oral presentation

Magnetic structure of frustrated magnets studied by spherical neutron polarimetry

Matsuda, Masaaki; Takeda, Masayasu; Osawa, Akira*; Nakamura, Mitsutaka; Kajimoto, Ryoichi; Kakurai, Kazuhisa

no journal, , 

no abstracts in English

Oral presentation

Magnetic structure of frustrated magnets studied by 3D neutron polarimetry using CRYOPAD at JRR-3

Matsuda, Masaaki; Takeda, Masayasu; Osawa, Akira*; Nakamura, Mitsutaka; Kajimoto, Ryoichi; Kakurai, Kazuhisa

no journal, , 

no abstracts in English

Oral presentation

Anisotropic spin freezing in lightly-doped La$$_{2-x}$$Sr$$_x$$CuO$$_4$$

Matsuda, Masaaki; Fujita, Masaki*; Takeda, Masayasu; Yamada, Kazuyoshi*; Kakurai, Kazuhisa

no journal, , 

Polarized neutron scattering is an important tool to clarify the existence of chirality. Furthermore, it also gives useful information on magnetic anisotropy of the spin fluctuations in the diagonal incommensurate phase. We performed polarized neutron scattering experiments in lightly-doped La$$_{1.982}$$Sr$$_{0.018}$$CuO$$_4$$. The results showed that the chiral terms are almost negligible, indicating that there is no chirality or that the two chirality domains are equally populated. The diagonal terms originate from the magnetic anisotropy in the antiferromagnetically ordered phase. It was found that the spins lie almost in the CuO$$_2$$ plane although a finite out-of-plane component was observed. It was also found that there exists a small anisotropy in the CuO$$_2$$ plane and the spin component is larger along the b axis, suggesting the remnant of anisotropy in pure La$$_2$$CuO$$_4$$.

Oral presentation

Magnetic structure of TbMnO$$_3$$ studied with spherical neutron polarimetry

Kajimoto, Ryoichi; Matsuda, Masaaki; Takeda, Masayasu; Kakurai, Kazuhisa; Mitsui, Yukari*; Yoshizawa, Hideki*; Kimura, Tsuyoshi*; Tokura, Yoshinori*

no journal, , 

no abstracts in English

28 (Records 1-20 displayed on this page)