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Journal Articles

Local atomic displacements and sign of the structural transformation in medium-entropy alloys observed in extended X-ray absorption fine structure spectra

Ikeda, Yoichi*; Umemoto, Yoshihiko*; Matsumura, Daiju; Tsuji, Takuya; Hashimoto, Yuki*; Kitazawa, Takafumi*; Fujita, Masaki*

Materials Transactions, 64(9), p.2254 - 2260, 2023/09

Journal Articles

Observation of field-induced single-ion magnetic anisotropy in a multiorbital Kondo alloy (Lu,Yb)Rh$$_2$$Zn$$_{20}$$

Kitazawa, Takafumi; Ikeda, Yoichi*; Sakakibara, Toshiro*; Matsuo, Akira*; Shimizu, Yusei*; Tokunaga, Yo; Haga, Yoshinori; Kindo, Koichi*; Nambu, Yusuke*; Ikeuchi, Kazuhiko*; et al.

Physical Review B, 108(8), p.085105_1 - 085105_7, 2023/08

Journal Articles

Cu $$K$$-edge X-ray absorption fine structure study of $$T'$$-type $$RE$$$$_{2}$$CuO$$_{4+alpha-delta}$$ ($$RE$$ = Rare Earth); Toward unified understanding of electronic state of $$T'$$-type cuprate

Chen, Y.*; Asano, Shun*; Wang, T.*; Xie, P.*; Kitayama, Shinnosuke*; Ishii, Kenji*; Matsumura, Daiju; Tsuji, Takuya; Taniguchi, Takanori*; Fujita, Masaki*

JPS Conference Proceedings (Internet), 38, p.011050_1 - 011050_6, 2023/05

Journal Articles

Estimation of creep behavior of thick rubber bearings from 47 years observation in an actual building

Masaki, Nobuo*; Kato, Koji*; Yamamoto, Tomohiko; Miyagawa, Takayuki*; Fujita, Satoshi*; Okamura, Shigeki*

Nihon Kenchiku Gakkai Gijutsu Hokokushu, 28(68), p.81 - 84, 2022/02

no abstracts in English

Journal Articles

Spin excitations coupled with lattice and charge dynamics in La$$_{2-x}$$Sr$$_{x}$$CuO$$_{4}$$

Ikeuchi, Kazuhiko*; Wakimoto, Shuichi; Fujita, Masaki*; Fukuda, Tatsuo; Kajimoto, Ryoichi; Arai, Masatoshi*

Physical Review B, 105(1), p.014508_1 - 014508_7, 2022/01

 Times Cited Count:1 Percentile:37.1(Materials Science, Multidisciplinary)

Journal Articles

Distinct variation of electronic states due to annealing in $$T'$$-type La$$_{1.8}$$Eu$$_{0.2}$$CuO$$_{4}$$ and Nd$$_{2}$$CuO$$_{4}$$

Asano, Shun*; Ishii, Kenji*; Matsumura, Daiju; Tsuji, Takuya; Kudo, Kota*; Taniguchi, Takanori*; Saito, Shin*; Sunohara, Toshiki*; Kawamata, Takayuki*; Koike, Yoji*; et al.

Physical Review B, 104(21), p.214504_1 - 214504_7, 2021/12

 Times Cited Count:0 Percentile:0(Materials Science, Multidisciplinary)

Journal Articles

Triplon current generation in solids

Chen, Y.*; Sato, Masahiro*; Tang, Y.*; Shiomi, Yuki*; Oyanagi, Koichi*; Masuda, Takatsugu*; Nambu, Yusuke*; Fujita, Masaki*; Saito, Eiji

Nature Communications (Internet), 12, p.5199_1 - 5199_7, 2021/08

 Times Cited Count:5 Percentile:58.53(Multidisciplinary Sciences)

Journal Articles

Formation process of swamp sediments of the Karako Lowland in northern Shimabara Peninsula, Western Japan

Nakanishi, Toshimichi*; Okuno, Mitsuru*; Yamasaki, Keiji*; Hong, W.*; Fujita, Natsuko; Nakamura, Toshio*; Horikawa, Yoshiyuki*; Sato, Eiichi*; Kimura, Haruo*; Tsutsumi, Hiroyuki*

Nagoya Daigaku Nendai Sokutei Kenkyu, 5, p.38 - 43, 2021/03

no abstracts in English

Journal Articles

Magnetic excitations of Sr$$_{3}$$Ir$$_{2}$$O$$_{7}$$ observed by inelastic neutron scattering technique

Fujita, Masaki*; Ikeuchi, Kazuhiko*; Kajimoto, Ryoichi; Nakamura, Mitsutaka

Journal of the Physical Society of Japan, 90(2), p.025001_1 - 025001_2, 2021/02

 Times Cited Count:1 Percentile:17.22(Physics, Multidisciplinary)

Journal Articles

Coexistence of two components in magnetic excitations of La$$_{2-x}$$Sr$$_{x}$$CuO$$_{4}$$ ($$x$$ = 0.10 and 0.16)

Sato, Kentaro*; Ikeuchi, Kazuhiko*; Kajimoto, Ryoichi; Wakimoto, Shuichi; Arai, Masatoshi*; Fujita, Masaki*

Journal of the Physical Society of Japan, 89(11), p.114703_1 - 114703_7, 2020/11

 Times Cited Count:4 Percentile:39.42(Physics, Multidisciplinary)

Journal Articles

Observation of magnon polarization

Nambu, Yusuke*; Barker, J.*; Okino, Yuki*; Kikkawa, Takashi*; Shiomi, Yuki*; Enderle, M.*; Weber, T.*; Winn, B.*; Graves-Brook, M.*; Tranquada, J. M.*; et al.

Physical Review Letters, 125(2), p.027201_1 - 027201_6, 2020/07

 Times Cited Count:35 Percentile:93.71(Physics, Multidisciplinary)

Journal Articles

Crystal structures of highly hole-doped layered perovskite nickelate Pr$$_{2-x}$$Sr$$_{x}$$NiO$$_{4}$$ studied by neutron diffraction

Kajimoto, Ryoichi; Nakajima, Kenji; Fujita, Masaki*; Ishikado, Motoyuki*; Torii, Shuki*; Ishikawa, Yoshihisa*; Miao, P.*; Kamiyama, Takashi*

Journal of the Physical Society of Japan, 88(11), p.114602_1 - 114602_6, 2019/11

 Times Cited Count:0 Percentile:0(Physics, Multidisciplinary)

Journal Articles

Al-impurity-induced magnetic excitations in heavily over-doped La$$_{1.7}$$Sr$$_{0.3}$$Cu$$_{0.95}$$Al$$_{0.05}$$O$$_{4}$$

Ikeuchi, Kazuhiko*; Nakajima, Kenji; Kawamura, Seiko; Kajimoto, Ryoichi; Wakimoto, Shuichi; Suzuki, Kensuke*; Fujita, Masaki*

AIP Advances (Internet), 8(10), p.101318_1 - 101318_5, 2018/10

 Times Cited Count:0 Percentile:0(Nanoscience & Nanotechnology)

By means of inelastic neutron scattering, we measured magnetic excitations in a sizable single crystal of La$$_{1.7}$$Sr$$_{0.3}$$Cu$$_{0.95}$$Al$$_{0.05}$$O$$_{4}$$, which is an Al-substituted system of the heavily hole-doped cuprate system La$$_{2-x}$$Sr$$_{x}$$CuO$$_{4}$$ with an effective concentration of holes of $$X_{rm eff}$$ = 0.25.

Journal Articles

Ce substitution and reduction annealing effects on electronic states in Pr$$_{2-x}$$Ce$$_x$$CuO$$_4$$ studied by Cu $$K$$-edge X-ray absorption spectroscopy

Asano, Shun*; Ishii, Kenji*; Matsumura, Daiju; Tsuji, Takuya; Ina, Toshiaki*; Suzuki, Kensuke*; Fujita, Masaki*

Journal of the Physical Society of Japan, 87(9), p.094710_1 - 094710_5, 2018/09

 Times Cited Count:11 Percentile:65.34(Physics, Multidisciplinary)

Journal Articles

Instrumental resolution of the chopper spectrometer 4SEASONS evaluated by Monte Carlo simulation

Kajimoto, Ryoichi; Sato, Kentaro*; Inamura, Yasuhiro; Fujita, Masaki*

AIP Conference Proceedings 1969, p.050004_1 - 050004_8, 2018/05

 Times Cited Count:6 Percentile:93.99

Journal Articles

Detailed study of the structure of the low-energy magnetic excitations in overdoped La$$_{1.75}$$Sr$$_{0.25}$$CuO$$_{4}$$

Ikeuchi, Kazuhiko*; Kikuchi, Tatsuya*; Nakajima, Kenji; Kajimoto, Ryoichi; Wakimoto, Shuichi; Fujita, Masaki*

Physica B; Condensed Matter, 536, p.717 - 719, 2018/05

 Times Cited Count:2 Percentile:10.5(Physics, Condensed Matter)

To examine the detailed structure of low-energy magnetic excitations in a high-transition-temperature superconducting cuprate with heavily hole-doping, we performed inelastic neutron scattering experiments on La$$_{1.75}$$Sr$$_{0.25}$$CuO$$_{4}$$. We observed clear dispersion relations of the previously reported incommensurate (IC) magnetic correlations at $$Q_{rm tet}$$ = (0.5 $$pm$$ $$delta$$, 0.5)/(0.5, 0.5 $$pm$$ $$delta$$). In addition, we show the emergence of continuum magnetic excitations with a ring shape centered at $$Gamma$$ point $$Q_{rm tet}=(0.5, 0.5)$$ in a constant energy spectrum at $$T$$ = 50 K. The radius of the ring ($$r$$ = 0.109) is smaller than the incommensurability ($$delta$$ = 0.118). This suggests that the origin of the ring-like excitations is different from that of the IC magnetic correlations, and the low-energy magnetic excitations of the La$$_{2-x}$$Sr$$_{x}$$CuO$$_{4}$$ system are inherently composed of these two kinds of excitations.

Journal Articles

Fe-impurity-induced magnetic excitations in heavily over-doped La$$_{1.7}$$Sr$$_{0.3}$$Cu$$_{0.95}$$Fe$$_{0.05}$$O$$_{4}$$

Ikeuchi, Kazuhiko*; Kikuchi, Tatsuya*; Nakajima, Kenji; Kajimoto, Ryoichi; Wakimoto, Shuichi; Fujita, Masaki*

Journal of Physics; Conference Series, 969(1), p.012024_1 - 012024_5, 2018/04

 Times Cited Count:1 Percentile:53.12

Journal Articles

Reduction and oxidation annealing effects on Cu $$K$$-edge XAFS for electron-doped cuprate superconductors

Asano, Shun*; Suzuki, Kensuke*; Matsumura, Daiju; Ishii, Kenji*; Ina, Toshiaki*; Fujita, Masaki*

Journal of Physics; Conference Series, 969, p.012051_1 - 012051_5, 2018/04

 Times Cited Count:3 Percentile:82.43

Journal Articles

Materials and Life Science Experimental Facility (MLF) at the Japan Proton Accelerator Research Complex, 2; Neutron scattering instruments

Nakajima, Kenji; Kawakita, Yukinobu; Ito, Shinichi*; Abe, Jun*; Aizawa, Kazuya; Aoki, Hiroyuki; Endo, Hitoshi*; Fujita, Masaki*; Funakoshi, Kenichi*; Gong, W.*; et al.

Quantum Beam Science (Internet), 1(3), p.9_1 - 9_59, 2017/12

The neutron instruments suite, installed at the spallation neutron source of the Materials and Life Science Experimental Facility (MLF) at the Japan Proton Accelerator Research Complex (J-PARC), is reviewed. MLF has 23 neutron beam ports and 21 instruments are in operation for user programs or are under commissioning. A unique and challenging instrumental suite in MLF has been realized via combination of a high-performance neutron source, optimized for neutron scattering, and unique instruments using cutting-edge technologies. All instruments are/will serve in world-leading investigations in a broad range of fields, from fundamental physics to industrial applications. In this review, overviews, characteristic features, and typical applications of the individual instruments are mentioned.

Journal Articles

Observation of momentum-dependent charge excitations in hole-doped cuprates using resonant inelastic X-ray scattering at the oxygen $$K$$ edge

Ishii, Kenji*; Toyama, Takami*; Asano, Shun*; Sato, Kentaro*; Fujita, Masaki*; Wakimoto, Shuichi; Tsutsui, Kenji*; Sota, Shigetoshi*; Miyawaki, Jun*; Niwa, Hideharu*; et al.

Physical Review B, 96(11), p.115148_1 - 115148_8, 2017/09

AA2017-0402.pdf:0.81MB

 Times Cited Count:28 Percentile:78.15(Materials Science, Multidisciplinary)

157 (Records 1-20 displayed on this page)