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Journal Articles

Kinetic inductance neutron detector operated at near critical temperature

Vu, TheDang; Nishimura, Kazuma*; Shishido, Hiroaki*; Harada, Masahide; Oikawa, Kenichi; Miyajima, Shigeyuki*; Hidaka, Mutsuo*; Oku, Takayuki; Soyama, Kazuhiko; Aizawa, Kazuya; et al.

Journal of Physics; Conference Series, 1590, p.012036_1 - 012036_9, 2020/07

Journal Articles

Temperature dependent characteristics of neutron signals from a current-biased Nb nanowire detector with $$^{10}$$B converter

Vu, TheDang; Iizawa, Yuki*; Nishimura, Kazuma*; Shishido, Hiroaki*; Kojima, Kenji*; Oikawa, Kenichi; Harada, Masahide; Miyajima, Shigeyuki*; Hidaka, Mutsuo*; Oku, Takayuki; et al.

Journal of Physics; Conference Series, 1293, p.012051_1 - 012051_9, 2019/10

Journal Articles

Multiple-wavelength neutron holography with pulsed neutrons

Hayashi, Koichi*; Oyama, Kenji*; Happo, Naohisa*; Matsushita, Tomohiro*; Hosokawa, Shinya*; Harada, Masahide; Inamura, Yasuhiro; Nitani, Hiroaki*; Shishido, Toetsu*; Yubuta, Kunio*

Science Advances (Internet), 3(8), p.e1700294_1 - e1700294_7, 2017/08

Journal Articles

Neutron flux spectrum revealed by Nb-based current-biased kinetic inductance detector with a $$^{10}$$B conversion layer

Miyajima, Shigeyuki*; Shishido, Hiroaki*; Narukami, Yoshito*; Yoshioka, Naohito*; Fujimaki, Akira*; Hidaka, Mutsuo*; Oikawa, Kenichi; Harada, Masahide; Oku, Takayuki; Arai, Masatoshi*; et al.

Nuclear Instruments and Methods in Physics Research A, 842, p.71 - 75, 2017/01

 Times Cited Count:9 Percentile:12.6(Instruments & Instrumentation)

Journal Articles

Cyclotron resonance study of quasiparticle mass and scattering rate in the hidden-order and superconducting phases of URu$$_2$$Si$$_2$$

Tonegawa, Sho*; Hashimoto, Kenichiro*; Ikada, Kisuke*; Tsuruhara, Yugo*; Lin, Y.-H.*; Shishido, Hiroaki*; Haga, Yoshinori; Matsuda, Tatsuma; Yamamoto, Etsuji; Onuki, Yoshichika; et al.

Physical Review B, 88(24), p.245131_1 - 245131_13, 2013/12

 Times Cited Count:11 Percentile:46.03(Materials Science, Multidisciplinary)

Journal Articles

Cyclotron resonance in the hidden-order phase of URu$$_2$$Si$$_2$$

Tonegawa, Sho*; Hashimoto, Kenichiro*; Ikada, Kisuke*; Lin, Y.-H.*; Shishido, Hiroaki*; Haga, Yoshinori; Matsuda, Tatsuma; Yamamoto, Etsuji; Onuki, Yoshichika; Ikeda, Hiroaki*; et al.

Physical Review Letters, 109(3), p.036401_1 - 036401_5, 2012/07

 Times Cited Count:48 Percentile:10.3(Physics, Multidisciplinary)

Journal Articles

Anomalous low-field diamagnetic response in ultraclean URu$$_2$$Si$$_2$$ superconductor

Okazaki, Ryuji*; Shimozawa, Masaaki*; Shishido, Hiroaki*; Konczykowski, M.*; Haga, Yoshinori; Matsuda, Tatsuma; Yamamoto, Etsuji; Onuki, Yoshichika; Yanase, Yoichi*; Shibauchi, Takasada*; et al.

Journal of Physics; Conference Series, 273, p.012081_1 - 012081_4, 2011/02

 Times Cited Count:2 Percentile:42.52

Journal Articles

Lower critical fields and the anisotropy in PrFeAsO$$_{1-y}$$ single crystals

Okazaki, Ryuji*; Konczykowski, M.*; Van der Beek, C. J.*; Kato, Tomonari*; Hashimoto, Kenichiro*; Shimozawa, Masaaki*; Shishido, Hiroaki*; Yamashita, Minoru*; Ishikado, Motoyuki; Kito, Hijiri*; et al.

Physica C, 470(Suppl.1), p.S485 - S486, 2010/12

 Times Cited Count:0 Percentile:100(Physics, Applied)

We report the lower critical fields $$H_{c1}$$ measurements on Fe-based oxipnictide PrFeAsO$$_{1-y}$$ single crystals for $$H$$ $$parallel$$ $$c$$ and $$H$$ $$parallel$$ $$ab$$-planes. To avoid the difficulty of $$H_{c1}$$ determinations due to the flux pinning, we developed a novel method using a miniature hall-sensor array which can evaluate the local magnetic induction ai each sensor position. The hall sensor which is placed on the edge of the crystal clearly resolves the first flux penetration from the Meissner state. The temperature dependence of $$H_{c1}$$ for $$H$$ $$parallel$$ $$c$$ is well scaled by the in-plane penetration depth and is consistent with a full-gap superconducting state. The anistropy of $$H_{c1}$$ at low temperatures is estimated to be $$sim$$ 3, which is much smaller than of $$H_{c2}$$. This indicates the multiband superconductivity, in which the active bands for superconductivity are more two-dimensional.

Journal Articles

Disorder and flux pinning in superconducting pnictide single crystals

Van der Beek, C. J.*; Rizza, G.*; Konczykowski, M.*; Fertey, P.*; Monnet, I.*; Okazaki, Ryuji*; Kato, Tomonari*; Hashimoto, Kenichiro*; Shimozawa, Masaaki*; Shishido, Hiroaki*; et al.

Physica C, 470(Suppl.1), p.S385 - S386, 2010/12

 Times Cited Count:1 Percentile:92.56(Physics, Applied)

Crystalline disorder in the pnictide superconductor PrFeAsO$$_{1-x}$$ is studied using magneto-optical visualisation of flux penetration, transmission electron microscopy, and X-ray diffraction using synchrotron radiation. Critical-state like flux distributions and the magnitude and temperature dependence of the critical current demonstrate bulk vortex pinning by oxygen vacancies at all temperatures.

Journal Articles

Fermi surface properties of ferromagnet UCu$$_2$$Si$$_2$$

Matsuda, Tatsuma; Ikeda, Shugo*; Yamamoto, Etsuji; Haga, Yoshinori; Shishido, Hiroaki*; Yamagami, Hiroshi; Settai, Rikio*; Onuki, Yoshichika

Journal of the Physical Society of Japan, 79(11), p.114712_1 - 114712_4, 2010/11

 Times Cited Count:4 Percentile:63.97(Physics, Multidisciplinary)

We have succeeded in growing a high-quality single crystal of UCu$$_2$$Si$$_2$$ with the tetragonal structure by the Sn-flux method and measured the de Haas-van Alphen effect. UCu$$_2$$Si$$_2$$ orders antiferromagnetically below $$T_{rm N}$$ = 106 K, and follows a successive ferromagnetic ordering at $$T_{rm C}$$ = 100 K. Several de Haas-van Alphen branches are observed in the ferromagnetic state, ranging from 5$$times$$10$$^6$$ to 7$$times$$10$$^7$$ Oe. The corresponding cyclotron effective masses are moderately large, ranging from 1.4 to 4.2 $$m_0$$, consistent with the electronic specific heat coefficient $$gamma$$ = 20 mJ/K$$^2cdot$$mol. These experimental results are approximately explained by the 5$$f$$-itinerant spin- and orbital-polarized energy band model.

Journal Articles

Exotic superconducting state embedded in the hidden order state of URu$$_2$$Si$$_2$$

Matsuda, Yuji*; Okazaki, Ryuji*; Kasahara, Yuichi*; Shishido, Hiroaki*; Shibauchi, Takasada*; Haga, Yoshinori; Matsuda, Tatsuma; Onuki, Yoshichika

Physica C, 470(20), p.1013 - 1017, 2010/11

 Times Cited Count:1 Percentile:92.56(Physics, Applied)

Journal Articles

Anomalous temperature dependence of lower critical field in ultraclean URu$$_2$$Si$$_2$$

Okazaki, Ryuji*; Shimozawa, Masaaki*; Shishido, Hiroaki*; Konczykowski, M.*; Haga, Yoshinori; Matsuda, Tatsuma; Yamamoto, Etsuji; Onuki, Yoshichika; Yanase, Yoichi*; Shibauchi, Takasada*; et al.

Journal of the Physical Society of Japan, 79(8), p.084705_1 - 084705_7, 2010/08

 Times Cited Count:15 Percentile:31.5(Physics, Multidisciplinary)

Journal Articles

Recent progress in the energy recovery linac project in Japan

Sakanaka, Shogo*; Akemoto, Mitsuo*; Aoto, Tomohiro*; Arakawa, Dai*; Asaoka, Seiji*; Enomoto, Atsushi*; Fukuda, Shigeki*; Furukawa, Kazuro*; Furuya, Takaaki*; Haga, Kaiichi*; et al.

Proceedings of 1st International Particle Accelerator Conference (IPAC '10) (Internet), p.2338 - 2340, 2010/05

Future synchrotron light source using a 5-GeV energy recovery linac (ERL) is under proposal by our Japanese collaboration team, and we are conducting R&D efforts for that. We are developing high-brightness DC photocathode guns, two types of cryomodules for both injector and main superconducting (SC) linacs, and 1.3 GHz high CW-power RF sources. We are also constructing the Compact ERL (cERL) for demonstrating the recirculation of low-emittance, high-current beams using above-mentioned critical technologies.

Journal Articles

Lower critical fields of superconducting PrFeAsO$$_{1-y}$$ single crystals

Okazaki, Ryuji*; Konczykowski, M.*; Van der Beek, C. J.*; Kato, Tomonari*; Hashimoto, Kenichiro*; Shimozawa, Motoyuki*; Shishido, Hiroaki*; Yamashita, Minoru*; Ishikado, Motoyuki; Kito, Hijiri*; et al.

Physical Review B, 79(6), p.064520_1 - 064520_6, 2009/02

 Times Cited Count:55 Percentile:11.31(Materials Science, Multidisciplinary)

We have studied the lower critical fields H$$_{c1}$$ of superconducting iron oxipnictide PrFeAsO$$_{1-y}$$ single crystals for H parallel and perpendicular to the ab-planes.

Journal Articles

Single crystal growth and the fermi surface property in LuCoGa$$_5$$

Matsuda, Tatsuma; Haga, Yoshinori; Sakai, Hironori; Aoki, Dai*; Ikeda, Shugo; Yamamoto, Etsuji; Shishido, Hiroaki*; Settai, Rikio*; Harima, Hisatomo*; Onuki, Yoshichika

Journal of the Physical Society of Japan, 77(2), p.024704_1 - 024704_6, 2008/02

 Times Cited Count:1 Percentile:87.5(Physics, Multidisciplinary)

We succeeded in growing a high-quality single crystal of LuCoGa$$_5$$ with the HoCoGa$$_5$$-type tetragonal crystal structure by the Ga self-flux method. The lattice parameters, fractional coordinates, and thermal parameters were determined from single-crystal X-ray diffraction measurements. We also measured the electrical resistivity, specific heat, and the de Haas-van Alphen (dHvA) effect. The Fermi surface mainly consists of two nearly cylindrical Fermi surfaces, which are well explained by the results of full-potential linearized augmented plane wave (FLAPW) energy band calculations.

Journal Articles

Flux line lattice melting and the formation of a coherent quasiparticle bloch state in the ultraclean URu$$_2$$Si$$_2$$ superconductor

Okazaki, Ryuji*; Kasahara, Yuichi*; Shishido, Hiroaki*; Konczykowski, M.*; Behnia, K.*; Haga, Yoshinori; Matsuda, Tatsuma; Onuki, Yoshichika; Shibauchi, Takasada*; Matsuda, Yuji*

Physical Review Letters, 100(3), p.037004_1 - 037004_4, 2008/01

 Times Cited Count:26 Percentile:22.49(Physics, Multidisciplinary)

Journal Articles

Exotic superconducting properties in the electron-hole-compensated heavy-fermion "semimetal" URu$$_2$$Si$$_2$$

Kasahara, Yuichi*; Iwasawa, Takuya*; Shishido, Hiroaki*; Shibauchi, Takasada*; Behnia, K.*; Haga, Yoshinori; Matsuda, Tatsuma; Onuki, Yoshichika; Sigrist, M.*; Matsuda, Yuji*

Physical Review Letters, 99(116), p.116402_1 - 116402_4, 2007/09

 Times Cited Count:158 Percentile:2.97(Physics, Multidisciplinary)

Journal Articles

Single crystal growth and fermi surface property in ThRhIn$$_5$$

Matsuda, Tatsuma; Haga, Yoshinori; Yamamoto, Etsuji; Ikeda, Shugo; Shishido, Hiroaki*; Settai, Rikio*; Harima, Hisatomo*; Onuki, Yoshichika

Journal of the Physical Society of Japan, 76(6), p.064712_1 - 064712_7, 2007/06

 Times Cited Count:11 Percentile:41.71(Physics, Multidisciplinary)

We succeeded in growing a high-quality single crystal of ThRhIn$$_5$$ with the HoCoGa$$_5$$-type tetragonal crystal structure by the In-flux method. The lattice parameters, positional parameters and thermal parameters were determined from single-crystal X-ray diffraction measurements. We also measured the electrical resistivity and de Haas-van Alphen (dHvA) effect. Main dHvA branches are very similar to those of the 4$$f$$-itinerant heavy fermion superconductor CeCoIn$$_5$$, but the cyclotron effective masses are by one to two orders of magnitude smaller than those of CeCoIn$$_5$$. These Fermi surface properties are well explained by the FLAPW energy band calculations.

Journal Articles

Magnetic properties and crystalline electric field scheme in RRhIn$$_5$$ (R: Rare earth)

Hieu, N. V.*; Takeuchi, Tetsuya*; Shishido, Hiroaki*; Tonohiro, Chie*; Yamada, Tsutomu*; Nakashima, Hiroshi*; Sugiyama, Kiyohiro*; Settai, Rikio*; Matsuda, Tatsuma; Haga, Yoshinori; et al.

Journal of the Physical Society of Japan, 76(6), p.064702_1 - 064702_16, 2007/06

 Times Cited Count:40 Percentile:16.54(Physics, Multidisciplinary)

Journal Articles

Magnetic and electrical properties in CePtSi$$_{3}$$ without inversion symmetry in the crystal structure

Kawai, Tomoya*; Okuda, Yusuke*; Shishido, Hiroaki*; Thamizhavel, A.*; Matsuda, Tatsuma; Haga, Yoshinori; Nakashima, Miho*; Takeuchi, Tetsuya*; Hedo, Masato*; Uwatoko, Yoshiya*; et al.

Journal of the Physical Society of Japan, 76(1), p.014710_1 - 014710_6, 2007/01

 Times Cited Count:15 Percentile:34.41(Physics, Multidisciplinary)

We succeeded in growing a single crystal of CePtSi$$_{3}$$ by the Sn-flux method. CePtSi$$_{3}$$ is found to be an antiferromagnet with two transitions at 4.8 and 2.4 K. Magnetic easy direction was [100] direction with an ordered moment of 1.15 $$mu_{rm B}$$/Ce. The anisotropy is similar to that of CeIrSi$$_{3}$$ in which the pressure-induced superconductivity was observed.

38 (Records 1-20 displayed on this page)