Nuclear resonant scattering measurements on Fe by multichannel scaling with a 64 pixel silicon avalanche photodiode linear-array detector

Kishimoto, Shunji*; Mitsui, Takaya; Haruki, Rie*; Yoda, Yoshitaka*; Taniguchi, Takashi*; Shimazaki, Shoichi*; Ikeno, Masahiro*; Saito, Masatoshi*; Tanaka, Manobu*

Review of Scientific Instruments, 85(11), p.113102_1 - 113102_5, 2014/11

https://doi.org/10.1063/1.4900862

Ultracentrifuge experiment on AgI super-ionic conductor

Ono, Masao; Okayasu, Satoru; Iguchi, Yusuke*; Esaka, Fumitaka; Bagum, R.*; Haruki, Rie; Mashimo, Tsutomu*

Transactions of the Japan Society for Aeronautical and Space Sciences, Aerospace Technology Japan (Internet), 12(ists29), p.Tq_1 - Tq_3, 2014/04

https://doi.org/10.2322/tastj.12.Tq_1

We had realized the composition gradient of elements or isotopes in some binary alloys or single element by solid-state centrifugation. While, it might difficult to realize graded structure of elements in binary ionic crystal by centrifugation as it strongly keeps their stoichiometry. However, isotope fractionation in binary ionic crystal by centrifugation might be expected as the self-diffusion of ions occurs. We have planed the ultracentrifuge experiments on -AgI superionic conductor to investigate the isotope effect in binary ionic crystal under a strong centrifugal acceleration field. -AgI superionic conductor is suitable for the confirmation experiment as it is an intrinsic ionic crystal and Ag ions have high diffusivity. For the first stage, we have experimentally searched the experimental conditions of magnitude of centrifugal acceleration and temperature that ensure the experiment without decomposition. It is confirmed that the combination of experimental conditions of up to 6.110 g, 350C, 24h ensure the experiment without decomposition at least.

Spin pumping efficiency from half metallic CoMnSi

Chudo, Hiroyuki; Ando, Kazuya*; Saito, Kesami*; Okayasu, Satoru; Haruki, Rie; Sakuraba, Yuya*; Yasuoka, Hiroshi; Takanashi, Koki; Saito, Eiji

Journal of Applied Physics, 109(7), p.073915_1 - 073915_4, 2011/04

https://doi.org/10.1063/1.3556433

We present spin pumping using a Heusler alloy CoMnSi/Pt bilayer film. A spin current is produced by a ferromagnetic resonance (FMR) technique. The pure spin current injected into the Pt layer from the CoMnSi layer is detected by the inverse spin-Hall effect (ISHE), which converts the spin current into an electric current. We estimated a damping constant of the CoMnSi/Pt bilayer film from an angular dependence of FMR spectra. Using the damping constant efficiency of spin pumping from the CoMnSi layer is evaluated. We found that a mixing conductance at the CoMnSi/Pt interface is comparable to that at a permalloy/Pt interface.

Investigation on new scintillators for subnanosecond time-resolved X-ray measurements

Haruki, Rie; Shibuya, Kengo*; Nishikido, Fumihiko*; Koshimizu, Masanori*; Yoda, Yoshitaka*; Kishimoto, Shunji*

Journal of Physics; Conference Series, 217, p.012007_1 - 012007_4, 2010/05

https://doi.org/10.1088/1742-6596/217/1/012007

Site-specific phonon density of states discerned using electronic states

Seto, Makoto; Kitao, Shinji*; Kobayashi, Yasuhiro*; Haruki, Rie*; Yoda, Yoshitaka*; Mitsui, Takaya; Ishikawa, Tatsuo*

Physical Review Letters, 91(18), p.185505_1 - 185505_4, 2003/10

https://doi.org/10.1103/PhysRevLett.91.185505

no abstracts in English

Dependence of incoherent nuclear resonant scattering of synchrotron radiation on the number of resonant nuclei

Masuda, Ryo; Kitao, Shinji*; Kobayashi, Yasuhiro*; Seto, Makoto*; Zhang, X.*; Kishimoto, Shunji*; Haruki, Rie*

no journal, , 

no abstracts in English

Ag isotope fractionation in a centrifuged -AgI super-ionic conductor

Ono, Masao; Okayasu, Satoru; Iguchi, Yusuke*; Esaka, Fumitaka; Bagum, R.*; Haruki, Rie; Mashimo, Tsutomu*

no journal, , 

The ultracentrifuge experiment was performed on an -AgI super-ionic conductor at acceleration field of 6.110 g at 220C for 100 hours. From the analysis using Electron Probe Micro Analyzer (EPMA) and micro-area X-Ray Diffractometer, it was confirmed that the centrifuged specimen kept its stoichiometry. The isotope ratio measurements were performed on the centrifuged specimen with Secondary Ion Mass Spectrometer (SIMS). Ag/Ag isotope ratio on the specimen changed with negative gradient in the direction of centrifugal force approximately 1.5%. These observations indicated that the heavy Ag isotopes moved in the direction of the centrifugal force and the light Ag isotopes moved in the counter direction keeping charge balance in the specimen.

Spin pumping in CoMnSi

Chudo, Hiroyuki; Ando, Kazuya*; Saito, Kesami*; Okayasu, Satoru; Haruki, Rie; Sakuraba, Yuya*; Yasuoka, Hiroshi; Takanashi, Koki; Saito, Eiji

no journal, , 

no abstracts in English

Isotope effect in AgI super-ionic conductor by centrifugation

Ono, Masao; Okayasu, Satoru; Iguchi, Yusuke*; Esaka, Fumitaka; Bagum, R.*; Haruki, Rie; Mashimo, Tsutomu*

no journal, , 

The ultracentrifuge experiment was performed on an -AgI super-ionic conductor at acceleration field of 6.110 g at 220C for 100 hours. It was confirmed that the centrifuged specimen kept its stoichiometry by the analysis using Electron Probe Micro Analyzer and micro-area X-Ray Diffractometer. The isotope ratio measurements on the centrifuged specimen were performed using Secondary Ion Mass Spectrometer (CAMECAIMS-6f). The isotope ratio of Ag/Ag on the specimen changed with negative gradient in the direction of centrifugal force approximately 1.5%. These observation results indicated that the heavy Ag isotopes moved in the direction of the centrifugal force and the light Ag isotopes moved in the counter direction keeping their charge balance in the specimen.

Observation of Barnett effect by nuclear magnetic resonance

Chudo, Hiroyuki; Ono, Masao; Harii, Kazuya; Matsuo, Mamoru; Ieda, Junichi; Haruki, Rie; Okayasu, Satoru; Yasuoka, Hiroshi; Maekawa, Sadamichi; Saito, Eiji

no journal, , 

no abstracts in English