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1

Enhanced trapped field in MgB 2 bulk magnets by tuning grain boundary pinning through milling

Sugino, Sho, Yamamoto, Akiyasu, Shimoyama, Jun-ichi, Kishio, Kohji

Journal:

Superconductor Science and Technology

Year:

2015

Language:

english

File:

PDF, 1.51 MB

english, 2015

2

Recent advances in iron-based superconductors toward applications

Hosono, Hideo, Yamamoto, Akiyasu, Hiramatsu, Hidenori, Ma, Yanwei

Journal:

Materials Today

Year:

2017

Language:

english

File:

PDF, 6.27 MB

english, 2017

3

Flux pinning properties of impurity doped MgB2 bulks synthesized by diffusion method

Shinya Ueda, Jun-ichi Shimoyama, Akiyasu Yamamoto, Yukari Katsura, Isao Iwayama, Shigeru Horii, Kohji Kishio

Journal:

Physica C: Superconductivity

Year:

2005

Language:

english

File:

PDF, 285 KB

english, 2005

4

Effects of sintering conditions on critical current properties and microstructures of MgB2 bulks

Akiyasu Yamamoto, Jun-ichi Shimoyama, Shinya Ueda, Yukari Katsura, Isao Iwayama, Shigeru Horii, Kohji Kishio

Journal:

Physica C: Superconductivity

Year:

2005

Language:

english

File:

PDF, 236 KB

english, 2005

5

Reactivity of carbides in synthesis of MgB2 bulks

Akiyasu Yamamoto, Jun-ichi Shimoyama, Shinya Ueda, Shigeru Horii, Kohji Kishio

Journal:

Physica C: Superconductivity

Year:

2006

Language:

english

File:

PDF, 232 KB

english, 2006

6

Flux pinning properties of undoped and C-doped MgB2 bulks with controlled grain sizes

Yukari Katsura, Akiyasu Yamamoto, Shinya Ueda, Isao Iwayama, Shigeru Horii, Jun-ichi Shimoyama, Kohji Kishio

Journal:

Physica C: Superconductivity

Year:

2007

Language:

english

File:

PDF, 131 KB

english, 2007

7

Irreversibility lines of layered Fe-based superconductors with thick blocking layers

Jun-ichi Shimoyama, Hiraku Ogino, Akiyasu Yamamoto, Kohji Kishio

Journal:

Solid State Communications

Year:

2012

Language:

english

File:

PDF, 541 KB

english, 2012

8

Effect of Packing Density on Critical Current Density at High Magnetic Fields in Polycrystalline MgB$_{2}$ Superconductors

Matsushita, Teruo, Tanigawa, Junya, Kiuchi, Masaru, Yamamoto, Akiyasu, Shimoyama, Jun-ichi, Kishio, Kohji

Journal:

Japanese Journal of Applied Physics

Year:

2012

Language:

english

File:

PDF, 841 KB

english, 2012

9

Synthesis of RE123 Melt-Solidified Bulks under Low Pressure Pure Oxygen

Kinemura Yohei, Shimoyama Jun-ichi, Yamamoto Akiyasu, Ogino Hiraku, Kishio Kohji

Journal:

Physics Procedia

Year:

2012

Language:

english

File:

PDF, 637 KB

english, 2012

10

New Layered Nickel Arsenides (Ni2As2)(Ba3Sc2O5), (Ni2As2)(Ba4Sc2O6) and (Ni2As2)(Ba4Sc3O8)

Kenji Machida, Hiraku Ogino, Akiyasu Yamamoto, Kohji Kishio, Jun-ichi Shimoyama

Journal:

Physics Procedia

Year:

2012

Language:

english

File:

PDF, 736 KB

english, 2012

11

High critical current properties of MgB[sub 2] bulks prepared by a diffusion method

Ueda, Shinya, Shimoyama, Jun-ichi, Iwayama, Isao, Yamamoto, Akiyasu, Katsura, Yukari, Horii, Shigeru, Kishio, Kohji

Journal:

Applied Physics Letters

Year:

2005

Language:

english

File:

PDF, 426 KB

english, 2005

12

Limiting factors of normal-state conductivity in superconducting MgB 2 : an application of mean-field theory for a site percolation problem

Yamamoto, Akiyasu, Shimoyama, Jun-ichi, Kishio, Kohji, Matsushita, Teruo

Journal:

Superconductor Science and Technology

Year:

2007

Language:

english

File:

PDF, 1.84 MB

english, 2007

13

Strongly connected ex situ MgB 2 polycrystalline bulks fabricated by solid-state self-sintering

Tanaka, Hiroya, Yamamoto, Akiyasu, Shimoyama, Jun-ichi, Ogino, Hiraku, Kishio, Kohji

Journal:

Superconductor Science and Technology

Year:

2012

Language:

english

File:

PDF, 1.01 MB

english, 2012

14

A New Layered Iron Arsenide Superconductor: (Ca,Pr)FeAs 2

Yakita, Hiroyuki, Ogino, Hiraku, Okada, Tomoyuki, Yamamoto, Akiyasu, Kishio, Kohji, Tohei, Tetsuya, Ikuhara, Yuichi, Gotoh, Yoshito, Fujihisa, Hiroshi, Kataoka, Kunimitsu, Eisaki, Hiroshi, Shimoyama,

Journal:

Journal of the American Chemical Society

Year:

2014

Language:

english

File:

PDF, 1.98 MB

english, 2014

15

Effects of phosphorous doping on the superconducting properties of SmFeAs(O,F)

Singh, Shiv Jee, Shimoyama, Jun-ichi, Yamamoto, Akiyasu, Ogino, Hiraku, Kishio, Kohji

Journal:

Physica C: Superconductivity

Year:

2014

Language:

english

File:

PDF, 1.25 MB

english, 2014

16

Enhancement of intergranular current density of Sm-based oxypnictide superconductors with Sn addition

Singh, Shiv Jee, Shimoyama, Jun-ichi, Ogino, Hiraku, Yamamoto, Akiyasu, Kishio, Kohji

Journal:

Superconductor Science and Technology

Year:

2014

Language:

english

File:

PDF, 2.22 MB

english, 2014

17

Effects of B 4 C doping on critical current properties of MgB 2 superconductor

Yamamoto, Akiyasu, Shimoyama, Jun-ichi, Ueda, Shinya, Iwayama, Isao, Horii, Shigeru, Kishio, Kohji

Journal:

Superconductor Science and Technology

Year:

2005

Language:

english

File:

PDF, 833 KB

english, 2005

18

Self-sintering-assisted high intergranular connectivity in ball-milled ex situ MgB 2 bulks

Mizutani, Shunsuke, Yamamoto, Akiyasu, Shimoyama, Jun-ichi, Ogino, Hiraku, Kishio, Kohji

Journal:

Superconductor Science and Technology

Year:

2014

Language:

english

File:

PDF, 1.97 MB

english, 2014

19

Dramatic effects of chlorine doping on J c and microstructure of fluorine-free MOD Y123 thin films

Motoki, Takanori, Shimoyama, Jun-ichi, Yamamoto, Akiyasu, Ogino, Hiraku, Kishio, Kohji, Honda, Genki, Nagaishi, Tatsuoki

Journal:

Superconductor Science and Technology

Year:

2014

Language:

english

File:

PDF, 2.25 MB

english, 2014

20

High-Tc and high-Jc SmFeAs(O,F) films on fluoride substrates grown by molecular beam epitaxy

Ueda, Shinya, Takeda, Soichiro, Takano, Shiro, Yamamoto, Akiyasu, Naito, Michio

Journal:

Applied Physics Letters

Year:

2011

Language:

english

File:

PDF, 1.02 MB

english, 2011

21

Permanent magnet with MgB2 bulk superconductor

Yamamoto, Akiyasu, Ishihara, Atsushi, Tomita, Masaru, Kishio, Kohji

Journal:

Applied Physics Letters

Year:

2014

Language:

english

File:

PDF, 1.69 MB

english, 2014

22

Improved critical current properties observed in MgB 2 bulks synthesized by low-temperature solid-state reaction

Yamamoto, Akiyasu, Shimoyama, Jun-ichi, Ueda, Shinya, Katsura, Yukari, Horii, Shigeru, Kishio, Kohji

Journal:

Superconductor Science and Technology

Year:

2005

Language:

english

File:

PDF, 420 KB

english, 2005

23

Synthesis of high J c MgB 2 bulks with high reproducibility by a modified powder-in-tube method

Yamamoto, Akiyasu, Shimoyama, Jun-ichi, Ueda, Shinya, Katsura, Yukari, Horii, Shigeru, Kishio, Kohji

Journal:

Superconductor Science and Technology

Year:

2004

Language:

english

File:

PDF, 355 KB

english, 2004

24

Mechanism for high critical current density in in situ MgB 2 wire with large area-reduction ratio

Kodama, Motomune, Ichiki, Yota, Tanaka, Kazuhide, Okamoto, Kazutaka, Yamamoto, Akiyasu, Shimoyama, Jun-ichi

Journal:

Superconductor Science and Technology

Year:

2014

Language:

english

File:

PDF, 2.21 MB

english, 2014

25

Significant enhancement of the intergrain coupling in lightly F-doped SmFeAsO superconductors

Singh, Shiv Jee, Shimoyama, Jun-ichi, Yamamoto, Akiyasu, Ogino, Hiraku, Kishio, Kohji

Journal:

Superconductor Science and Technology

Year:

2013

Language:

english

File:

PDF, 54 KB

english, 2013

26

High-T c and high-J c SmFeAs(O,F) films on fluoride substrates grown by molecular beam epitaxy

Naito, Michio, Ueda, Shinya, Takeda, Soichiro, Takano, Shiro, Yamamoto, Akiyasu

Journal:

MRS Proceedings

Year:

2013

Language:

english

File:

PDF, 1.00 MB

english, 2013

27

Co and Mn doping effect in polycrystalline (Ca,La) and (Ca,Pr)FeAs 2 superconductors

Yakita, Hiroyuki, Ogino, Hiraku, Sala, Alberto, Okada, Tomoyuki, Yamamoto, Akiyasu, Kishio, Kohji, Iyo, Akira, Eisaki, Hiroshi, Shimoyama, Jun-ichi

Journal:

Superconductor Science and Technology

Year:

2015

Language:

english

File:

PDF, 1.78 MB

english, 2015

28

Synthesis and physical properties of Ca 1− x RE x FeAs 2 with RE = La–Gd

Sala, Alberto, Yakita, Hiroyuki, Ogino, Hiraku, Okada, Tomoyuki, Yamamoto, Akiyasu, Kishio, Kohji, Ishida, Shigeyuki, Iyo, Akira, Eisaki, Hiroshi, Fujioka, Masaya, Takano, Yoshihiko, Putti, Marina, Sh

Journal:

Applied Physics Express

Year:

2014

Language:

english

File:

PDF, 569 KB

english, 2014

29

A new homologous series of iron pnictide oxide superconductors (Fe 2 As 2 )(Ca n + 2 (Al, Ti) n O y ) ( n = 2, 3, 4)

Ogino, Hiraku, Machida, Kenji, Yamamoto, Akiyasu, Kishio, Kohji, Shimoyama, Jun-ichi, Tohei, Tetsuya, Ikuhara, Yuichi

Journal:

Superconductor Science and Technology

Year:

2010

Language:

english

File:

PDF, 711 KB

english, 2010

30

Understanding routes for high connectivity in ex situ MgB 2 by self-sintering

Mizutani, Shunsuke, Yamamoto, Akiyasu, Shimoyama, Jun-ichi, Ogino, Hiraku, Kishio, Kohji

Journal:

Superconductor Science and Technology

Year:

2014

Language:

english

File:

PDF, 1.46 MB

english, 2014

31

Microstructural Characteristics of Ball-Milled Self-Sintered Ex Situ MgB2 Bulks

Shimada, Yusuke, Hata, Satoshi, Ikeda, Ken-ichi, Nakashima, Hideharu, Matsumura, Syo, Tanaka, Hiroya, Yamamoto, Akiyasu, Shimoyama, Jun-ichi, Kishio, Kohji

Journal:

IEEE Transactions on Appiled Superconductivity

Year:

2015

Language:

english

File:

PDF, 917 KB

english, 2015

32

Enhanced critical current properties observed in Na 2 CO 3 -doped MgB 2

Ueda, Shinya, Shimoyama, Jun-ichi, Yamamoto, Akiyasu, Horii, Shigeru, Kishio, Kohji

Journal:

Superconductor Science and Technology

Year:

2004

Language:

english

File:

PDF, 288 KB

english, 2004

33

Essential factors for the critical current density in superconducting MgB 2 : connectivity and flux pinning by grain boundaries

Matsushita, Teruo, Kiuchi, Masaru, Yamamoto, Akiyasu, Shimoyama, Jun-ichi, Kishio, Kohji

Journal:

Superconductor Science and Technology

Year:

2008

Language:

english

File:

PDF, 585 KB

english, 2008

34

Towards the Realization of Higher Connectivity in MgB$_{2}$ Conductors: In-situ or Sintered Ex-situ ?

Yamamoto, Akiyasu, Tanaka, Hiroya, Shimoyama, Jun-ichi, Ogino, Hiraku, Kishio, Kohji, Matsushita, Teruo

Journal:

Japanese Journal of Applied Physics

Year:

2012

Language:

english

File:

PDF, 749 KB

english, 2012

35

Microstructural connectivity in sintered ex-situ MgB2 bulk superconductors

Shimada, Yusuke, Hata, Satoshi, Ikeda, Ken-ichi, Nakashima, Hideharu, Matsumura, Syo, Tanaka, Hiroya, Yamamoto, Akiyasu, Shimoyama, Jun-ichi, Kishio, Kohji

Journal:

Journal of Alloys and Compounds

Year:

2016

Language:

english

File:

PDF, 3.93 MB

english, 2016

36

B23-O-18Effectiveness of multi-scale observations for polycrystalline superconducting materials

Shimada, Yusuke, Hata, Satoshi, Matsumoto, Akiyoshi, Kumakura, Hiroaki, Yamamoto, Akiyasu, Nakashima, Hideharu, Konno, Toyohiko J.

Journal:

Year:

2015

Language:

english

File:

PDF, 672 KB

english, 2015

37

Improved critical current properties of MgB 2 bulks by controlling microstructures

Katsura, Yukari, Yamamoto, Akiyasu, Ueda, Shinya, Iwayama, Isao, Horii, Shigeru, Shimoyama, Jun-ichi, Kishio, Kohji

Journal:

Journal of Physics Conference Series

Year:

2006

Language:

english

File:

PDF, 380 KB

english, 2006

38

Strong Relationship between Irreversibility Field and Crystallinity Discovered in Undoped and Carbon Substituted MgB 2 Bulks

Yamamoto, Akiyasu, Shimoyama, Jun-ichi, Ueda, Shinya, Iwayama, Isao, Katsura, Yukari, Horii, Shigeru, Kishio, Kohji

Journal:

Journal of Physics Conference Series

Year:

2006

Language:

english

File:

PDF, 184 KB

english, 2006

39

Simple Route to Grow High-Quality MgB 2 Thin Films by Pyrolysis of Decaborane (B 10 H 14 ) in Mg Vapor

Naito, Michio, Yamamoto, Akiyasu, Ueda, Shinya, Nishiyuki, Kazuki

Journal:

Applied Physics Express

Year:

2011

Language:

english

File:

PDF, 1.89 MB

english, 2011

40

Relationship between Current Transport Properties and the Microstructure in a Random Polycrystalline Fe-Oxypnictide Bulk

Kametani, Fumitake, Yamamoto, Akiyasu, Polyanskii, A. A., Abraimov, D., Li, P., Larbalestier, D. C.

Journal:

Journal of the Japan Institute of Metals

Year:

2010

Language:

english

File:

PDF, 5.85 MB

english, 2010

41

Development of c-Axis Oriented MgB2 Bulks by Magnetic Field Orientation Method

Mochizuki, Toshihiko, Yamamoto, Akiyasu, Ogino, Hiraku, Shimoyama, Jun-ichi, Kishio, Kohji, Horii, Shigeru, Wada, Kyosuke, Yamada, Yutaka

Journal:

Journal of the Japan Institute of Metals

Year:

2010

File:

PDF, 3.19 MB

2010

42

Development of Polycrystalline Bulk MgB2 Superconducting Magnet by Hot-pressing

Yamada, Yutaka, Ohuchi, Hiroshi, Yamamoto, Akiyasu, Kishio, Kohji

Year:

2016

File:

PDF, 1.54 MB

2016

43

jPOSTrepo: an international standard data repository for proteomes

Okuda, Shujiro, Watanabe, Yu, Moriya, Yuki, Kawano, Shin, Yamamoto, Tadashi, Matsumoto, Masaki, Takami, Tomoyo, Kobayashi, Daiki, Araki, Norie, Yoshizawa, Akiyasu C., Tabata, Tsuyoshi, Sugiyama, Naoyu

Journal:

Nucleic Acids Research

Year:

2017

Language:

english

File:

PDF, 598 KB

english, 2017

44

High-performance dense MgB 2 superconducting wire fabricated from mechanically milled powder

Kodama, Motomune, Suzuki, Takaaki, Tanaka, Hideki, Okishiro, Kenji, Okamoto, Kazutaka, Nishijima, Gen, Matsumoto, Akiyoshi, Yamamoto, Akiyasu, Shimoyama, Jun-ichi, Kishio, Kohji

Journal:

Superconductor Science and Technology

Year:

2017

Language:

english

File:

PDF, 1.61 MB

english, 2017

45

Microstructural evolution in infiltration-growth processed MgB 2 bulk superconductors

Bhagurkar, Ashutosh G., Yamamoto, Akiyasu, Dennis, Anthony R., Durrell, John H., Aljohani, Talal A., Nadendla, Hari B., Cardwell, David A.

Journal:

Journal of the American Ceramic Society

Year:

2017

Language:

english

File:

PDF, 2.08 MB

english, 2017

46

Numerical modelling of iron-pnictide bulk superconductor magnetisation

Ainslie, Mark D, Yamamoto, Akiyasu, Fujishiro, Hiroyuki, Weiss, Jeremy D, Hellstrom, Eric E

Journal:

Superconductor Science and Technology

Year:

2017

Language:

english

File:

PDF, 1.87 MB

english, 2017

47

Multi-scale Observation of Grain Structure in Iron-based Superconductor

Shimada, Yusuke, Konno, Toyohiko J., Yamamoto, Akiyasu, Hata, Satoshi

Journal:

Year:

2016

File:

PDF, 2.00 MB

2016

48

Effect of the premixing of MgB 2 powder on microstructures and electromagnetic properties in PIT-processed MgB 2 wires

Kodama, Motomune, Tanaka, Kazuhide, Okamoto, Kazutaka, Yamamoto, Akiyasu, Shimoyama, Jun-ichi

Journal:

Materials Research Express

Year:

2018

Language:

english

File:

PDF, 1.67 MB

english, 2018

49

A 39-year-old female with cerebellar tumor and visual disturbance

Tanaka, Hirotomo, Yamamoto, Daisuke, Mizukawa, Katsu, Kanamori, Akiyasu, Chihara, Norio, Matsuoka, Ryosuke, Hara, Shigeo, Hirose, Takanori, Sasayama, Takashi, Kohmura, Eiji

Journal:

Brain Pathology

Year:

2018

Language:

english

File:

PDF, 187 KB

english, 2018

50

Formation of defects and their influence on inter- and intra-granular current in sintered polycrystalline 122 phase Fe-based superconductors

Shimada, Yusuke, Yamamoto, Akiyasu, Hayashi, Yujiro, Kishio, Kohji, Shimoyama, Jun-ichi, Hata, Satoshi, Konno, Toyohiko J

Journal:

Superconductor Science and Technology

Year:

2019

Language:

english

File:

PDF, 7.88 MB

english, 2019