Progress of 33T cryogen-free superconducting magnet project at HFLSM Reviewed International journal

Satoshi Awaji, Arnaud Badel, Alexandra Zampa, Kohki Takahashi, Tatsunori Okada, Yuji Tsuchiya, Tatsuro Uto, Taizo Tosaka, Hiroyuki Takewa, Hayato Nezuka, Satoshi Hanai, Masahiro Sugimoto, Ryo Taniguchi, Hiroyuki Fukushima, Kiyoshige Hirose, Shogo Muto, Shinji Fujita, Masanori Daibo

IEEE Transactions on Applied Superconductivity   35 ( 5 )   4300406/1 - 4300406/6   2025.08

Influence of thickness on the microstructure and performance of BaHfO₃-doped EuBa₂Cu₃O_7-δ layers grown by ultra-fast PLD techniques Reviewed International journal

Zhao M., Wu Y., Xiang H., Liu D., Shi J., Tsuchiya Y., Okada T., Awaji S., Zhao Y.

Applied Surface Science   694   162791/1 - 162791/8   2025.06

Enhancement of 2G-HTS wire performance in strong magnetic fields through heavy ion irradiation Reviewed International journal

Petrykin V., Okube M., Degtyarenko P., Yoshinaka N., Gaifullin M., Kaneya S., Hanaya H., Okada T., Awaji S., Lee S.

Superconductor Science and Technology   38 ( 4 )   2025.04

Doping Dependence of Upper Critical Field of High-T_c Cuprate Bi_2+xSr_2-xCaCu₂O_8+δ Estimated from Irreversibility Field at Zero Temperature Reviewed International journal

Kato J., Ishida S., Okada T., Nakagawa S., Mino Y., Higashi Y., Kashiwagi T., Awaji S., Iyo A., Ogino H., Mawatari Y., Takeshita N., Yoshida Y., Eisaki H., Nishio T.

Journal of the Physical Society of Japan   93 ( 10 )   104705/1 - 104705/10   2024.09

Seven-Year Operation of 25 T Cryogen-Free Superconducting Magnet as a User Magnet at HFLSM, IMR, Tohoku University Reviewed International journal

Takahashi K., Okada T., Tsuchiya Y., Awaji S., Takewa H., Hanai S., Ioka S.

IEEE Transactions on Applied Superconductivity   34 ( 5 )   4601905/1 - 4601905/5   2024.08

Screening and Coupling Currents Induced Fields on a Large-Scale Prototype REBCO Insulated Coil Reviewed International journal

Zampa A., Takahashi K., Tsuchiya Y., Okada T., Awaji S., Uto T., Takewa H., Hanai S., Ioka S., Inagaki J.

IEEE Transactions on Applied Superconductivity   34 ( 5 )   4700205/1 - 4700205/5   2024.08

Critical Current Correlations and Regressions Across the Superconducting Parameter Space of REBCO Wires, B||c Reviewed International journal

Greenberg A., Cheng J.L., Francis A., Shepherd M., Okada T., Awaji S., Sorbom B.

IEEE Transactions on Applied Superconductivity   34 ( 5 )   6602105/1 - 6602105/5   2024.08

Conceptual Design of a 33 T Cryogen-Free Magnet REBCO Insert: Mechanical Aspects and Protection Against Thermal Runaway Reviewed International journal

Badel A., Takahashi K., Zampa A., Okada T., Tsuchiya Y., Awaji S., Uto T., Tosaka T., Takewa H., Nezuka H., Hanai S.

IEEE Transactions on Applied Superconductivity   34 ( 5 )   4301205/1 - 4301205/5   2024.08

Characterization of In-Field Critical Currents in REBCO Tapes Over Wide Temperature Range by Pulsed Current Source With Supercapacitor Reviewed International journal

Tsuchiya Y., Mizuno K., Kohama Y., Zampa A., Okada T., Awaji S.

IEEE Transactions on Applied Superconductivity   34 ( 5 )   9500207/1 - 9500207/7   2024.08

Quadrupling the depairing current density in the iron-based superconductor SmFeAsO_1–xH_x Reviewed International journal

Miura M., Eley S., Iida K., Hanzawa K., Matsumoto J., Hiramatsu H., Ogimoto Y., Suzuki T., Kobayashi T., Ozaki T., Kurokawa H., Sekiya N., Yoshida R., Kato T., Okada T., Okazaki H., Yamaki T., Hänisch J., Awaji S., Maeda A., Maiorov B., Hosono H.

Nature Materials   23 ( 10 )   1370 - 1378   2024.07

Role of defects in increasing the critical current density of reel-to-reel PLD (Eu,Er)Ba₂Cu₃O_y+BaHfO₃-coated conductors Reviewed International journal

Suzuki T., Sakuma K., Ohta J., Ogimoto Y., Takahashi K., Ozaki T., Ibi A., Izumi T., Yamaki T., Okazaki H., Yamamoto S., Koshikawa H., Okada T., Awaji S., Miura M.

Japanese Journal of Applied Physics   63 ( 6 )   060901/1 - 060901/6   2024.06

Modulation of vortex pinning by matrix defects in YBa<inf>2</inf>Cu<inf>3</inf>O<inf>7</inf>nanocomposite film Reviewed International journal

Horide T., Higashi K., Ishimaru M., Okada T., Awaji S., Matsumoto K.

Superconductor Science and Technology   36 ( 10 )   105005/1 - 105005/911   2023.08

BaMO<inf>3</inf>(M = Zr, Hf) Doped REBCO Tapes Fabricated by Fluorine-Free MOD Reviewed International journal

Yoshihara T., Honda G., Nagaishi T., Kobayashi S., Kanie K., Okada T., Awaji S.

IEEE Transactions on Applied Superconductivity   33 ( 5 )   1 - 5   2023.08

Performance Test of 20-Stacked Two-Tapes-Bundled REBCO Pancake Coils for Upgrading of 25-T Cryogen-Free Superconducting Magnet to 30 T Reviewed International journal

Takahashi K., Badel A., Zampa A., Okada T., Awaji S., Nishijima G., Uto T., Takewa H., Hanai S., Ioka S., Inagaki J.

IEEE Transactions on Applied Superconductivity   33 ( 5 )   2023.08

First Validation of Robust REBCO Insert Concept on a Large 20-Pancake Prototype Reaching Up to 25 T Reviewed International journal

Badel A., Takahashi K., Zampa A., Okada T., Nishijima G., Uto T., Takewa H., Hanai S., Ioka S., Inagaki J., Awaji S.

IEEE Transactions on Applied Superconductivity   33 ( 5 )   4601505/1 - 4601505/5   2023.08

Flux Pinning Properties of 7-Filament Cu/Ag-Sheathed Ba<inf>1-x</inf>K<inf>x</inf>Fe<inf>2</inf>As<inf>2</inf>Tapes at 4.2 K Reviewed International journal

Luo J., Okada T., Awaji S., Liu C., Ma Y.

IEEE Transactions on Applied Superconductivity   33 ( 5 )   8200405/1 - 8200405/5   2023.08

Mechanical and critical current characteristics of high-strength Bi 2 Sr 2 Ca 2 Cu 3 O 10 + δ multi-filamentary tapes reinforced with thicker Ni-alloy laminations with various pre-tensions Reviewed International journal

Okada T., Kobayashi D., Sakai K., Awaji S., Kikuchi M., Kato T.

Superconductor Science and Technology   36 ( 1 )   014002   2023.01

Thermodynamic approach for enhancing superconducting critical current performance Reviewed International journal

Miura M., Tsuchiya G., Harada T., Sakuma K., Kurokawa H., Sekiya N., Kato Y., Yoshida R., Kato T., Nakaoka K., Izumi T., Nabeshima F., Maeda A., Okada T., Awaji S., Civale L., Maiorov B.

NPG Asia Materials   14 ( 1 )   2022.12

Effects of Precursor Film Thickness and Heat-Treatment Temperature On Joint Rate for a GdBa<inf>2</inf>Cu<inf>3</inf>O<inf>y</inf>Superconducting Joint Reviewed International journal

Doi Y., Teranishi R., Miyajima T., Matsumoto A., Petrykin V., Lee S., Okada T., Awaji S.

IEEE Transactions on Applied Superconductivity   32 ( 6 )   1 - 4   2022.09

Finite Element Analysis of AC Losses in Pancake Coils Wound Using Two-Ply Bundle Conductor Reviewed International journal

Kajikawa K., Miezaki M., Fujiwara Y., Awaji S., Badel A., Takahashi K., Okada T., Abe T.

IEEE Transactions on Applied Superconductivity   32 ( 6 )   1 - 5   2022.09

REBCO Coil With Robust Behavior Against Local Defects Wound Using Two-Tape Bundle Reviewed International journal

Abe T., Badel A., Okada T., Awaji S., Fujita S., Tsuchiya K., Iijima Y., Daibo M.

IEEE Transactions on Applied Superconductivity   32 ( 6 )   1 - 6   2022.09

Mechanical Properties of Four-Stacked Two Tape Bundled REBCO Pancake Coils Reviewed International journal

Takahashi K., Badel A., Okada T., Awaji S., Miyazaki H., Hanai S., Ioka S.

IEEE Transactions on Applied Superconductivity   32 ( 6 )   1 - 5   2022.09

Microstructure, pinning properties, and aging of CSD-grown SmBa<inf>2</inf>Cu<inf>3</inf>O<inf>7-δ </inf>films with and without BaHfO<inf>3</inf>nanoparticles Reviewed International journal

Hänisch J., Iida K., Cayado P., Erbe M., Grünewald L., Hatano T., Okada T., Gerthsen D., Awaji S., Holzapfel B.

Superconductor Science and Technology   35 ( 8 )   2022.08

Microstructure, pinning properties, and aging of CSD-grown SmBa2Cu3O7−δ films with and without BaHfO3 nanoparticles Reviewed International journal

Hänisch Jens, Iida Kazumasa, Cayado Pablo, Erbe Manuela, Grünewald Lukas, Hatano Takafumi, Okada Tatsunori, Gerthsen Dagmar, Awaji Satoshi, Holzapfel Bernhard

Superconductor Science and Technology   35 ( 8 )   084009   2022.07

AC Loss Measurements in an HTS Coil Wound Using Two-Ply Bundle Conductor Reviewed International journal

Kajikawa K., Fujiwara Y., Miezaki M., Awaji S., Badel A., Takahashi K., Okada T., Abe T., Fujita S., Muto S., Tsuchiya K., Iijima Y., Daibo M.

IEEE Transactions on Applied Superconductivity   32 ( 4 )   1 - 5   2022.06

High-Field Critical Current Properties of (Bi, Pb)<inf>2</inf>Sr<inf>2</inf>Ca<inf>2</inf>Cu<inf>3</inf>O<inf>y</inf>Filaments Reviewed International journal

Kobayashi D., Okada T., Awaji S.

IEEE Transactions on Applied Superconductivity   32 ( 4 )   6400105/1 - 6400105/5   2022.06

Development and large volume production of extremely high current density YBa<inf>2</inf>Cu<inf>3</inf>O<inf>7</inf> superconducting wires for fusion Reviewed International journal

Molodyk A., Samoilenkov S., Markelov A., Degtyarenko P., Lee S., Petrykin V., Gaifullin M., Mankevich A., Vavilov A., Sorbom B., Cheng J., Garberg S., Kesler L., Hartwig Z., Gavrilkin S., Tsvetkov A., Okada T., Awaji S., Abraimov D., Francis A., Bradford G., Larbalestier D., Senatore C., Bonura M., Pantoja A.E., Wimbush S.C., Strickland N.M., Vasiliev A.

Scientific Reports   11 ( 1 )   2021.12

Electronic states and energy dissipations of vortex core in pure fese single crystals investigated by microwave surface impedance measurements Reviewed International journal

Okada T., Imai Y., Urata T., Tanabe Y., Tanigaki K., Maeda A.

Journal of the Physical Society of Japan   90 ( 9 )   094704   2021.09

Electromagnetic Characteristics Study of Two-Ply REBCO Tapes Pancake Coils Reviewed International journal

Takahashi K., Okada T., Badel A., Awaji S., Miyazaki H., Hanai S., Ioka S.

IEEE Transactions on Applied Superconductivity   31 ( 5 )   1 - 5   2021.08

Detection and Protection against Quench/Local Thermal Runaway for a 30 T Cryogen-Free Magnet Reviewed International journal

Badel A., Okada T., Takahashi K., Fujita S., Miyazaki H., Ioka S., Awaji S.

IEEE Transactions on Applied Superconductivity   31 ( 5 )   1 - 5   2021.08

Robust REBCO Insert Coil for Upgrade of 25 T Cryogen-Free Superconducting Magnet Reviewed International journal

Awaji S., Badel A., Okada T., Takahashi K., Miyazaki H., Hanai S., Ioka S., Fujita S., Muto S., Iijima Y., Daibo M., Kajikawa K.

IEEE Transactions on Applied Superconductivity   31 ( 5 )   2021.08

In-Plane Domain Control of REBCO Coated Conductors by Annealing under Bending Strain Reviewed International journal

Okada T., Misaizu H., Awaji S.

IEEE Transactions on Applied Superconductivity   31 ( 5 )   1 - 6   2021.08

Mechanical and critical current characteristics of high-strength (Bi, Pb)<inf>2</inf>Sr<inf>2</inf>Ca<inf>2</inf>Cu<inf>3</inf>O<inf>10+δ</inf> tapes under uniaxial tensile strain Reviewed International journal

Okada T., Sakai K., Awaji S.

Superconductor Science and Technology   34 ( 2 )   2021.02

Microwave Hall effect measurement for materials in the skin depth region Reviewed International journal

Ogawa R., Okada T., Takahashi H., Nabeshima F., Maeda A.

Journal of Applied Physics   129 ( 1 )   015102   2021.01

Pinning analyses of a BaHfO<inf>3</inf>-containing GdBa<inf>2</inf>Cu<inf>3</inf>O<inf>7-δ</inf>thin film grown by chemical solution deposition Reviewed International journal

Iida K., Cayado P., Rijckaert H., Erbe M., H nisch J., Okada T., Van Driessche I., Awaji S., Holzapfel B.

Superconductor Science and Technology   34 ( 1 )   015009   2021.01

Superconducting-Gap Anisotropy of Iron Pnictides Investigated via Combinatorial Microwave Measurements Reviewed International journal

Okada T., Imai Y., Kitagawa K., Matsubayashi K., Nakajima M., Iyo A., Uwatoko Y., Eisaki H., Maeda A.

Scientific Reports   10 ( 1 )   7064   2020.12

A possible explanation for double-peak structure in strain dependence of critical current density in REBa<inf>2</inf>Cu<inf>3</inf>O Reviewed International journal

Okada T., Misaizu H., Awaji S.

Superconductor Science and Technology   33 ( 9 )   094014   2020.09

AC losses and induced fields in HTS coil wound using two-ply coated conductors Reviewed International journal

Yokoyama H., Zhu B., Kajikawa K., Awaji S., Badel A., Takahashi K., Okada T.

Journal of Physics: Conference Series   1559 ( 1 )   2020.06

Mechanical Properties of BaHfO<inf>3</inf>-Doped EuBCO Coated Conductors Fabricated by Hot-Wall PLD on IBAD Template Reviewed International journal

Fujita S., Muto S., Iijima Y., Daibo M., Okada T., Awaji S.

IEEE Transactions on Applied Superconductivity   30 ( 4 )   1 - 5   2020.06

Field Stability Analysis of 25 T Cryogen-Free Superconducting Magnet and Upgrade Plans for 30 T System at HFLSM, IMR, Tohoku University Reviewed International journal

Awaji S., Imai Y., Takahashi K., Okada T., Badel A., Miyazaki H., Hanai S., Ioka S.

IEEE Transactions on Applied Superconductivity   29 ( 5 )   1 - 5   2019.08

3-D properties in (RE)BCO tapes measured in fields up to 35T Reviewed International journal

Smith A.P., Raine M.J., Surrey E., Awaji S., Okada T., Hampshire D.P.

IEEE Transactions on Applied Superconductivity   29 ( 5 )   1 - 5   2019.08

Longitudinal Magnetic Field Effects on (Y,Gd)Ba<inf>2</inf>Cu<inf>3</inf>O<inf>7-δ</inf> Coated Conductor with BaHfO<inf>3</inf> Nanoparticles Fabricated by UTOC-MOD Method Reviewed International journal

Okada T., Misaizu H., Awaji S., Nakaoka K., MacHi T., Izumi T., Miura M.

IEEE Transactions on Applied Superconductivity   29 ( 5 )   1 - 5   2019.08

3-D properties in (RE)BCO tapes measured in fields up to 35T Reviewed International journal

Smith Andrew P., Raine Mark J., Surrey Elizabeth, Awaji Satoshi, Okada Tatsunori, Hampshire Damian P.

IEEE Transactions on Applied Superconductivity   29 ( 5 )   2019.01

Microstructures of superconducting joint between GdBa<inf>2</inf>Cu<inf>3</inf>O<inf>y</inf>-coated conductors via additionally deposited precursor films Reviewed International journal

Miyajima T., Teranishi R., Yasuyama S., Sato Y., Kaneko K., Maeda T., Ochi M., Hiramatsu K., Nakamura M., Petrykin V., Lee S., Okada T., Awaji S.

Japanese Journal of Applied Physics   58 ( 5 )   050913   2019.01

Influence of joint pressure on superconducting and mechanical properties for jointed GdBa<inf>2</inf>Cu<inf>3</inf>O<inf>y</inf> coated conductors via precursor films Reviewed International journal

Miyajima T., Teranishi R., Yasuyama S., Sato Y., Kaneko K., Petrykin V., Lee S., Okada T., Awaji S., Matsumoto A.

Japanese Journal of Applied Physics   58 ( 5 )   050907   2019.01

Flux-pinning properties of BaHfO <inf>3</inf> -doped EuBCO-coated conductors fabricated by Hot-Wall PLD Reviewed International journal

Fujita S., Muto S., Hirata W., Yoshida T., Kakimoto K., Iijima Y., Daibo M., Kiss T., Okada T., Awaji S.

IEEE Transactions on Applied Superconductivity   29 ( 5 )   1 - 5   2019.01

Development of Long-Length BMO-Doped REBCO Coated Conductors by Hot-Wall PLD Process Reviewed International journal

Fujita S., Muto S., Hirata W., Adachi Y., Yoshida T., Igarashi M., Kakimoto K., Iijima Y., Naoe K., Kiss T., Okada T., Awaji S.

IEEE Transactions on Applied Superconductivity   28 ( 4 )   1 - 4   2018.06