Refine your search:     
Report No.
 - 
Search Results: Records 1-12 displayed on this page of 12
  • 1

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Save select records

Oral presentation

Spin glass dynamics in a structural glass of C$$_{4}$$mimFeCl$$_{4}$$

Kofu, Maiko; Watanuki, Ryuta*; Sakakibara, Toshiro*; Kawamura, Seiko; Nakajima, Kenji; Ueki, Takeshi*; Akutsu, Kazuhiro*; Yamamuro, Osamu*

no journal, , 

Ionic liquids (ILs) have been in the spotlight due to their unique and interesting properties. It is remarkable that their physicochemical properties are controlled by varying cations and anions. Magnetic IL is an example. The first discovered magnetic IL C$$_{4}$$mimFeCl$$_{4}$$ is easily vitrified upon cooling and also crystallized by annealing. Interestingly, an antiferromagnetic transition occurs at 2.3 K in the crystalline state while spin-glass behavior is observed below 0.45 K (= $$T_{rm SG}$$) in the glassy state. Our inelastic neutron scattering experiments have demonstrated that the glassy C$$_{4}$$mimFeCl$$_{4}$$ exhibits a broad and non-dispersive excitation, while the crystal displays spin-wave excitations. The excitation spectrum in the glass state is scaled by the Bose population factor below $$T_{rm SG}$$, which is highly reminiscent of "boson peak" commonly observed in structural glasses. We guess that, since there is no periodicity in structural glasses, magnons hardly propagate through magnetic medium and are localized. The localized magnetic excitations are suggestive of the formation of spin clusters.

Oral presentation

Development and application of magnetic Pair Distribution Function (mPDF) analysis

Kodama, Katsuaki; Honda, Takashi*; Ikeda, Kazutaka*; Shamoto, Shinichi; Otomo, Toshiya*

no journal, , 

Oral presentation

Anisotropy of spontaneous magnetic field in chiral superconductor

Higemoto, Wataru; Okazawa, Takeshi*; Oda, Yuto; Miyazaki, Itsuki*; Ito, Takashi; Yoshida, Yoshiyuki*

no journal, , 

Oral presentation

Development and application of pulsed magnet system up to 30 tesla for neutron scattering experiment

Watanabe, Masao; Nojiri, Hiroyuki*; Kihara, Takumi*

no journal, , 

Superconducting DC magnet up to 17 Tesla has developed for neutron scattering experiments. Although the sample environment team in the MLF have several DC superconducting magnets up to 7 Tesla as a sample environment apparatus, some users have requested the preparation of higher field magnets. However, another magnet technology is needed to generate higher than 20 Tesla. However, it is difficult to construct such a large system in the MLF from the point of view of construction space. It is practical to employ a pulsed magnetic field as it enables operation of smaller energy as well as downsizing of the instruments. Therefore, we have been newly developed a compact and transportable pulsed magnet system up to 30 Tesla.

Oral presentation

Local structure analysis of (Na$$_{0.5}$$K$$_{0.45}$$Li$$_{0.05}$$)NbO$$_3$$-based system with tetragonal structure

Yoneda, Yasuhiro; Takuwa, Chihaya*

no journal, , 

Oral presentation

Oral presentation

Transformation of interstitial proton into substitutional hydride in reduced SrTiO$$_3$$ simulated with positively charged muons

Ito, Takashi; Higemoto, Wataru; Koda, Akihiro*; Shimomura, Koichiro*

no journal, , 

no abstracts in English

Oral presentation

Oral presentation

Martensitic transformation in metastable iron alloys monitored by neutron diffraction

Harjo, S.; Kawasaki, Takuro; Tsuchida, Noriyuki*; Morooka, Satoshi; Aizawa, Kazuya

no journal, , 

Oral presentation

In situ neutron diffraction during compression or tension of Mg$$_{97}$$Zn$$_{1}$$Y$$_{2}$$ consisting of LPSO phase and $$alpha$$Mg phase

Harjo, S.; Aizawa, Kazuya; Gong, W.*; Kawasaki, Takuro

no journal, , 

Oral presentation

Quasi-elastic and inelastic neutron scattering spectrometer DNA in MLF, J-PARC and its application to materials science

Kawakita, Yukinobu; Matsuura, Masato*; Tominaga, Taiki*; Yamada, Takeshi*; Kobayashi, Makoto*; Nakagawa, Hiroshi

no journal, , 

The ToF back scattering spectrometer, DNA at BL02, MLF, J-PARC, is a tool for quasi-elastic and inelastic neutron scattering studies aiming at atomic and spin dynamics ranged from pico to nano sec in bio-molecules, softmatters and solid state materials such as ionic conductors including batteries and strongly-correlated electron system. High signal-to-noise ratio are achieved by Si analyzer mirrors back-coated with a Gd neutron absorber. DNA equips a pulse shaping chopper of max 300 Hz and Si111 analyzer mirrors which select the scattered neutrons only with 2.08 meV with the Bragg angle of 87.5 degree and cover a momentum transfer from 0.08 to 1.9 (1/A). Recently we start installation of Si311 analyzer mirrors too which select a scattered neutron with 7.64 meV and widen a momentum transfer range up to 3.79 (1/A). In this presentation, we introduce the spec of DNA including recent commissioning for Si311 analyzer mirrors and several applications to materials science.

Oral presentation

Elastic and dynamical structural properties of La and Mn-doped SrTiO$$_{3}$$ studied by neutron scattering and their relation with thermal conductivities

Kajimoto, Ryoichi; Nakamura, Mitsutaka; Murai, Naoki; Shamoto, Shinichi; Honda, Takashi*; Ikeda, Kazutaka*; Otomo, Toshiya*; Hata, Hiroto*; Eto, Takahiro*; Noda, Masaaki*; et al.

no journal, , 

12 (Records 1-12 displayed on this page)
  • 1