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Journal Articles

Magnetic phase diagram of helimagnetic Ba(Fe$$_{1-x}$$Sc$$_{x}$$)$$_{12}$$O$$_{19}$$ (0 $$leq$$ x $$leq$$ 0.2) hexagonal ferrite

Maruyama, Kenichi*; Tanaka, Seiya*; Kiyanagi, Ryoji; Nakao, Akiko*; Moriyama, Kentaro*; Ishikawa, Yoshihisa*; Amako, Yasushi*; Iiyama, Taku*; Futamura, Ryusuke*; Utsumi, Shigenori*; et al.

Journal of Alloys and Compounds, 892, p.162125_1 - 162125_8, 2022/02

https://doi.org/10.1016/j.jallcom.2021.162125
 Times Cited Count：2 Percentile：9.61(Chemistry, Physical)

Journal Articles

Flux growth and magnetic properties of helimagnetic hexagonal ferrite Ba(Fe$$_{1-x}$$Sc$$_{x}$$)$$_{12}$$O$$_{19}$$ single crystals

Utsumi, Shigenori*; Tanaka, Seiya*; Maruyama, Kenichi*; Amako, Yasushi*; Kiyanagi, Ryoji; Nakao, Akiko*; Moriyama, Kentaro*; Ishikawa, Yoshihisa*; 9 of others*

ACS Omega (Internet), 5(38), p.24890 - 24897, 2020/09

https://doi.org/10.1021/acsomega.0c03671
 Times Cited Count：5 Percentile：19.14(Chemistry, Multidisciplinary)

Fabricating large, high-crystalline-quality single-crystal samples of hexagonal ferrite Ba(Fe$$_{1-x}$$Sc$$_{x}$$)$$_{12}$$O$$_{19}$$ is the first important step to elucidating its helimagnetic structure and developing it for further applications. In this study, single crystals of Ba(Fe$$_{1-x}$$Sc$$_{x}$$)$$_{12}$$O$$_{19}$$ of various Sc concentrations $$x$$ were successfully grown by the spontaneous crystallization method using Na$$_{2}$$O-Fe$$_{2}$$O$$_{3}$$ flux. X-ray diffraction and elemental analysis revealed that the obtained crystals were composed of single-phase Ba(Fe$$_{1-x}$$Sc$$_{x}$$)$$_{12}$$O$$_{19}$$ of high crystalline quality. The temperature dependence of magnetization and the magnetization curves at 77 K of the $$x$$ = 0.128 crystal exhibited behavior characteristics of helimagnetism. Neutron diffraction measurements of the $$x$$ = 0.128 crystal exhibited magnetic satellite reflection peaks below 211K, proving evidence that Ba(Fe$$_{1-x}$$Sc$$_{x}$$)$$_{12}$$O$$_{19}$$ behaves as a helimagnetic material.

Journal Articles

Materials and Life Science Experimental Facility at the Japan Proton Accelerator Research Complex, 3; Neutron devices and computational and sample environments

Sakasai, Kaoru; Sato, Setsuo*; Seya, Tomohiro*; Nakamura, Tatsuya; To, Kentaro; Yamagishi, Hideshi*; Soyama, Kazuhiko; Yamazaki, Dai; Maruyama, Ryuji; Oku, Takayuki; et al.

Quantum Beam Science (Internet), 1(2), p.10_1 - 10_35, 2017/09

https://doi.org/10.3390/qubs1020010

Neutron devices such as neutron detectors, optical devices including supermirror devices and $$^{3}$$He neutron spin filters, and choppers are successfully developed and installed at the Materials Life Science Facility (MLF) of the Japan Proton Accelerator Research Complex (J-PARC), Tokai, Japan. Four software components of MLF computational environment, instrument control, data acquisition, data analysis, and a database, have been developed and equipped at MLF. MLF also provides a wide variety of sample environment options including high and low temperatures, high magnetic fields, and high pressures. This paper describes the current status of neutron devices, computational and sample environments at MLF.

Journal Articles

IROHA2: Standard instrument control software framework in MLF, J-PARC

Nakatani, Takeshi; Inamura, Yasuhiro; Ito, Takayoshi*; Moriyama, Kentaro*

Proceedings of 11th New Opportunities for Better User Group Software (NOBUGS 2016) (Internet), p.76 - 79, 2016/10

https://doi.org/10.17199/NOBUGS2016.70

The public beamlines in MLF, J-PARC carry out many kinds of measurements and produce huge experimental data by users. It is important to be user-friendly and automated control software for efficient measurements. We have developed the MLF standard instrument control software framework "IROHA2". IROHA2 consists of the device control server to control and monitor each device, the instrument management server to authenticate a user, manage a measurement and configure an instrument setup, the sequence management server to do an automatic measurement and the integrate control server to unify instrument control and monitoring. Because each software component of IROHA2 has a web interface, we are able to use its all functions under multi-platform environment via a web browser. IROHA2 is also connected to and cooperated with several other systems which are the experimental status system, the MLF integrated authentication system and the MLF business database.

Journal Articles

Development of port plug handling tractor for ITER

Ise, Hideo*; Izaki, Makoto*; Oishi, Haruo*; Mori, Seiji*; Ako, Kentaro*; Moriyama, Hisashi*; Kagaya, Hiroaki*; Kobayashi, Masami*; Taguchi, Ko*; Shibanuma, Kiyoshi

FAPIG, (159), p.10 - 14, 2001/11

no abstracts in English

Oral presentation

IROHA2 device modules for common sample environment devices in MLF

Nakatani, Takeshi; Takahashi, Ryuta*; Moriyama, Kentaro*

no journal, , 

We carry out the experimental control with the standard instrument control software framework "IROHA2" in MLF, J-PARC. We have developed the IROHA2 device modules for the 7T magnet and the Nb furnace which are the common sample environment devices in MLF. The 7T magnet is the device to make a strong magnetic field to be applied on the sample with the superconducting magnet. The 7T magnet is the complex device composed of the power supply to make a current to be applied on the electric magnet, the refrigerators for the sample and the magnet, the helium liquid level gauge and the rotation controller for the sample. The Nb furnace is the device which make the sample a high temperature by an electric heat. The Nb furnace is monitored with reading out the status from the programmable logic controller and the recorder. Because we have developed the software modules for these devices, users can do an experiment easily integrated the devices and the data acquisition system in the instrument.

Oral presentation

The Implementation for flexible, real-time, connective functions in IROHA2

Nakatani, Takeshi; Inamura, Yasuhiro; Moriyama, Kentaro*

no journal, , 

The instruments in a common facility for public utilization by researchers must be supported many kinds of experiments. For this purpose, neutron and muon devices and computational and sample environments have been developed and used at the instruments in Materials and Life science experimental Facility (MLF), Japan Proton Accelerator Research Complex (J-PARC). We have introduced the common instrument control software framework "IROHA2" to the neutron and muon instruments in MLF. IROHA2 consists of several severs, which are the device control, the instrument management, the sequence management and the integrate control. Users cooperate to use these servers to carry out their experiments with a web browser. Because the proton beam power injected to MLF was increased, a measurement time is shorten, it is required more automatic and flexible measurements and quick-response data processing. In addition, many outer users perform diverse experiments with their own devices in MLF.

Oral presentation

Quantitative analysis of heavy neutron absorbing material at SENJU

Kiyanagi, Ryoji; Ishikawa, Yoshihisa*; Ohara, Takashi; Moriyama, Kentaro*; Munakata, Koji*; Nakao, Akiko*; Sakakura, Terutoshi*; Kimura, Hiroyuki*

no journal, , 

SENJU is a single crystal neutron diffractometer at Material and Life science experimental Facility (MLF) in J-PARC. In this study, a heavy neutron absorbing material has been measured in order to evaluate the feasibility of qualitative structure analyses on such material. The result showed that with some tricks in the measurement and treatment on the measured data, quantitative structure analyses has been demonstrated to be feasible.

Oral presentation

Application of ML and KDE for efficient data treatment on single crystal diffraction data

Kiyanagi, Ryoji; Ohara, Takashi; Nakao, Akiko*; Munakata, Koji*; Ishikawa, Yoshihisa*; Moriyama, Kentaro*

no journal, , 

Oral presentation

Application of machine learning for efficient data check on single crystal diffraction data

Kiyanagi, Ryoji; Ohara, Takashi; Nakao, Akiko*; Munakata, Koji*; Ishikawa, Yoshihisa*; Moriyama, Kentaro*

no journal, , 

no abstracts in English

Oral presentation

Upgrades of a TOF single-crystal neutron diffractometer SENJU at J-PARC

Ohara, Takashi; Kiyanagi, Ryoji; Nakao, Akiko*; Munakata, Koji*; Ishikawa, Yoshihisa*; Moriyama, Kentaro*; Tamura, Itaru; Kaneko, Koji

no journal, , 

Oral presentation

Study of Multi-crystal structure analysis for tiny single crystals at SENJU

Kiyanagi, Ryoji; Ohara, Takashi; Nakao, Akiko*; Munakata, Koji*; Ishikawa, Yoshihisa*; Moriyama, Kentaro*

no journal, , 

no abstracts in English

Oral presentation

Latest status of a single-crystal neutron diffractometer SENJU at MLF, J-PARC

Ohara, Takashi; Kiyanagi, Ryoji; Nakao, Akiko*; Munakata, Koji*; Ishikawa, Yoshihisa*; Moriyama, Kentaro*; Tamura, Itaru; Kaneko, Koji

no journal, , 

no abstracts in English

Oral presentation

Current status of a single-crystal TOF neutron diffractometer SENJU at J-PARC

Ohara, Takashi; Kiyanagi, Ryoji; Nakao, Akiko*; Munakata, Koji*; Ishikawa, Yoshihisa*; Moriyama, Kentaro*; Kaneko, Koji; Nakamura, Tatsuya; To, Kentaro; Sakasai, Kaoru; et al.

no journal, , 

no abstracts in English

Oral presentation

Automatic data filtering by autoencoder at SENJU

Kiyanagi, Ryoji; Ohara, Takashi; Nakao, Akiko*; Munakata, Koji*; Ishikawa, Yoshihisa*; Moriyama, Kentaro*

no journal, , 

no abstracts in English

Oral presentation

Studies of hydrogen bonds in functional molecular crystals by single-crystal neutron diffraction at SENJU

Ohara, Takashi; Kiyanagi, Ryoji; Nakao, Akiko*; Munakata, Koji*; Ishikawa, Yoshihisa*; Moriyama, Kentaro*

no journal, , 

Oral presentation

Status of a single-crystal neutron diffractometer SENJU

Ohara, Takashi; Kiyanagi, Ryoji; Nakao, Akiko*; Munakata, Koji*; Ishikawa, Yoshihisa*; Moriyama, Kentaro*; Tamura, Itaru; Kaneko, Koji; Nakamura, Tatsuya; To, Kentaro; et al.

no journal, , 

no abstracts in English

Oral presentation

Evaluation of the effect of measurement time on the determination of hydrogen atom positions by single-crystal neutron diffraction

Ohara, Takashi; Kiyanagi, Ryoji; Nakao, Akiko*; Munakata, Koji*; Ishikawa, Yoshihisa*; Moriyama, Kentaro*

no journal, , 

Oral presentation

Plan for the neutron data utilization at MLF in J-PARC

Inamura, Yasuhiro; Hasemi, Hiroyuki; Moriyama, Kentaro*; Okazaki, Nobuo*

no journal, , 

Several policy developments on "Open Science" have recently been implemented in Japan to promote open access to scientific research data. These policies have led to the launch of various projects aimed at developing platforms for open science, particularly for managing and publishing research data. In this context, J-PARC's Materials and Life Science Facility (MLF) is encouraged to align with these policies by adopting these platforms. Additionally, MLF plans to offer data search services, enabling users to access experimental data for analysis from outside of J-PARC, although this implementation has not yet been achieved. We now plan to enhance the data flow of metadata and neutron measurement data by upgrading the current systems.

Oral presentation

IROHA upgrade and development of MLF experimental database for remote access

Nakatani, Takeshi; Inamura, Yasuhiro; Moriyama, Kentaro; Otomo, Toshiya*; Ito, Takayoshi*

no journal, , 

no abstracts in English

48 (Records 1-20 displayed on this page)