Science from the Initial Operation of HRC

Itoh, Shinichi; Yokoo, Tetsuya; Ibuka, Soshi; Kawana, Daichi; Hiraka, Haruhiro; Ono, Kanta; Endoh, Y.; Masuda, Takatsugu; Yoshizawa, H.; Soda, Minoru; Ikeda, Yoichi; Sato, Taku; Nambu, Yusuke; Kuwahara, K.; Yano, Shinichiro; Akimitsu, Jun; Tokura, Y.; Fujita, M.; Hase, Masashi; Iwasa, Kazuaki; Fukuda, Tatsuo; Ikeuchi, Ken; Yoshida, Kōji; Yamaguchi, Toshio

doi:10.7566/jpscp.8.034001

Cited by 6 publications

(1 citation statement)

References 12 publications

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“…At HRC, three types of inelastic neutron scattering experiments can be performed: high-resolution experiments in the conventional energy-momentum space, eV neutron spectroscopy, and neutron Brillouin scattering (NBS). In high-resolution experiments in the conventional space, the dynamical structure factor in a spin system can be determined in the full energy-momentum space, and many studies on condensed matter physics can be performed, for instance [50]. The dynamical structure factors of the multiferroic system NdFe 3 (BO 3 ) 4 , layered nickelate R 2−x Sr x NiO 4 (R = La and Nd), and carrier-doped Haldane system Nd 2−x Ca x BaNiO 5 were determined over the entire Brillouin zone.…”

Section: High Resolution Chopper Spectrometer Hrcmentioning

confidence: 99%

Materials and Life Science Experimental Facility (MLF) at the Japan Proton Accelerator Research Complex II: Neutron Scattering Instruments

Nakajima

Kawakita

Itoh

et al. 2017

QuBS

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Abstract: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.

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Section: High Resolution Chopper Spectrometer Hrcmentioning

confidence: 99%

Materials and Life Science Experimental Facility (MLF) at the Japan Proton Accelerator Research Complex II: Neutron Scattering Instruments

Nakajima

Kawakita

Itoh

et al. 2017

QuBS

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Damped spin-wave excitations in the itinerant antiferromagnet γ−Fe0.7Mn0.3

et al. 2017

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The collective spin-wave excitations in the antiferromagnetic state of γ-Fe0.7Mn0.3 were investigated using the inelastic neutron scattering technique. The spin excitations remain isotropic up to the high excitation energy,hω = 78 meV. The excitations gradually become broad and damped above 40 meV. The damping parameter γ reaches 110(16) meV athω = 78 meV, which is much larger than that for other metallic compounds, e.g., CaFe2As2 (24 meV), La2−2xSr1+2xMn2O7 (52 − 72 meV), and Mn90Cu10 (88 meV). In addition, the spin-wave dispersion shows a deviation from the relation (hω) 2 = c 2 q 2 +∆ 2 above 40 meV. The group velocity above this energy increases to 470(40) meVÅ, which is higher than that at the low energies, c = 226(5) meVÅ. These results could suggest that the spin-wave excitations merge with the continuum of the individual particle-hole excitations at 40 meV.

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