T. Miyazaki, S. Fukui, J. Ogawa, T. Sato, T. Oka, J. Scheiter, W. Hasler, E. Kulawansha, Z. Yuanding, K. Yokoyama, "Pulse-Field Magnetization for Disc-Shaped MgB2 Bulk Magnets," IEEE Transactions on Applied Superconductivity, Vol.27, No.2, Art.No. 6800504, 2016.12
T. Oka, Y. Takahashi, S. Yaginuma, J. Ogawa, S. Fukui, T. Sato, K. Yokoyama, T. Nakamura,"Uniform magnetic field between face-to-face settled HTS bulk magnets combining concave and convex magnetic field distributions," Physics Procedia, Vol.81, pp.45-48, 2016.5
K. Yokoyama, E. Kulawansha, Z. Yuanding, T. Oka,"Influence of the position of a small hole on the trapped field performance in a holed superconducting bulk magnet," IEEE Transactions on Applied Superconductivity, Vol.26, No.3, Art.No. 8201704, 2016.2
T. Oka, K. Hara, J. Ogawa, S. Fukui, T. Sato, K. Yokoyama, A. Murakami, M. Langer,"Selective magnetic field invasion into HTS bulk magnets in pulse field magnetizing processes," IEEE Transactions on Applied Superconductivity, Vol.26, No.3, Art.No. 6800504, 2016.2
K. Yokoyama, E. Kulawansha, Z. Yuanding, T. Oka,"Development of a desktop type superconducting bulk magnet," IEEE Transactions on Applied Superconductivity, Vol.26, No.4, pp.1-4, 2016.1
T. Oka, Y. Takayanagi, S. Machida, K. Ichiju, S. Fukui, J. Ogawa, T. Sato, M. Ooizumi, M. Tsujimura, K. Yokoyama,"Magnetic Separation for Recovering Ni-Compounds from Plating Waste with Use of HTS Bulk Magnets," IEEE Transactions on Applied Superconductivity, Vol.26, No.4, Art.No. 3700204, 2016.1
T. Oka, T. Miyazaki, J. Ogawa, S. Fukui, T. Sato, K. Yokoyama, M. Langer, "Magnetization Behavior of RE123 Bulk Magnets Bearing Twin Seed-Crystals in Pulsed Field Magnetization Processes," Superconductor Science and Technology, Vol. 29, No. 2, pp. 50-53, 2015.12
K. Yokoyama, R. Igarashi, R. Togasaki, T. Oka, "Pulsed field magnetization characteristics of a holed superconducting bulk magnet," Physica C, Vol. 518,pp.117-121, 2015.11
T. Oka, H. Ota, T. Shimoda, J. Ogawa, S. Fukui, T. Sato, K. Yokoyama, A. Murakami, M. Langer, "Preferential Magnetic Flux Invasion and Heat Generation Owing to Macrostructure in HTS Bulk Magnets in Pulse Field Magnetization Processes," IEEE Transactions on Applied Superconductivity, Vol. 25, No. 3, Art.No. 6800904, 2015.6
K. Yokoyama, R. Igarashi, R. Togasaki, T. Oka, "Improvement of the trapped field performance of a holed superconducting bulk magnet," IEEE Transactions on Applied Superconductivity, Vol. 25, No. 3, Art.No. 6800804, 2015.6
K. Yokoyama, T. Tsukui, H. Mita, N. Tsubonoya, T. Oka, "Investigation of the Flux Flow-inhibiting Effect of a Hole-opened Superconducting Bulk Magnet," Physics Procedia, Vol.58, pp.302-305, 2014.10
T. Oka, Y. Yamada, T. Horiuchi, J. Ogawa, S. Fukui, T. Sato, K. Yokoyama, M. Langer, "Pulsed-field Invasion to HTS Bulk Magnets Grown from Two Seeds with Varied Seed-crystal Positions and Numbers," Physics Procedia, Vol.58, pp.74-77, 2014.10
T. Oka, H. Fukazawa, N. Yoshizawa, Y. Takayanagi, J. Ogawa, S. Fukui, T. Sato, M. Ooizumi, M. Tsujimura, K. Yokoyama, "Magnetic separation technique using high temperature superconducting bulk magnets and application to plating liquid waste treatment",J. Jpn. Soc. Powder Powder Metallurgy, Vol.61, No. S1, pp.S164-S166,2014.5
T. Oka, H. Fukazawa, S. Fukui, J. Ogawa, T. Sato, M. Ooizumi, M. Tsujimura, K. Yokoyama, "Collection of Ni-Bearing Materal from Electroless Plating Waste by Magnetic Separation with HTS Bulk Magnet",Physica C: Superconductivity and its applications, Vol.496, pp.58-62,2014.1
T. Oka, Y. Yamada, D. Ishiduka, J. Ogawa, S. Fukui,T. Sato, K. Yokoyama, M. Langer, "Magnetic Field-Trapping Properties of Melt-Processed Y123 Bulk Superconductors Activated by Pulsed-Field Magnetizing Method", Transactions of the Materials Research Society of Japan, Vol.38, No.2, pp.273-277, 2013.12
T. Oka, E. Hirayama, T. Kanai, J. Ogawa, S. Fukui, T. Sato, K. Yokoyama, "Strong Magnetic Field Generators Containing HTS Bulk magnets and Compact Refrigerators and Their Field-Trapping Performances", IEEE Transactions on Applied Superconductivity, Vol.24, No.3, 2013.10
K. Yokoyama, T. Tsukui, H. Mita, N. Tsubonoya, T. Oka, "Experimental Verification of the Magnetic Flux Penetration Property and a Flux Flow Inhibition Effect of a Superconducting Bulk Magnet with Small Holes", Physics Procedia, Vol.45, pp.261-264, 2013.5
T. Oka, D. Ishiduka, J. Ogawa, S. Fukui, T. Sato, K. Yokoyama, A. Murakami, H. Stopfel, "Flux-Invading Behaviors and Temperature Changes in Dy123 Bulk Magnet in Iterative Pulse Field Magnetization Process", Physica C, Vol. 494, pp.46-49, 2013.4
K. Yokoyama, T. Oka, N. Kondo, S. Hosaka, "Pulsed-field magnetization of a bulk superconductor with small holes", Physica C, Vol. 484, pp.343-347, 2013.1
T. Oka, T. Kimura, D. Mimura, H. Fukazawa, S. Fukui, J. Ogawa, T. Sato, M. Ooizumi, K. Yokoyama, M. Tsujimura, T. Terasawa, "Magnetic precipitate separation for Ni plating waste liquid using HTS bulk magnets", Physica C, Vol. 484, pp.325-328, 2013.1
K. Yokoyama, T. Oka, K. Noto, "Pulsed-Field Magnetization of a Superconducting Bulk Magnet After Field Cooling Using a Permanent Magnet", IEEE Trans. on Applied Superconductivity, Vol. 22, No.3, pp.4700104(4pages) , 2012.6
K. Yokoyama, T. Oka, K. Noto, "Improvement of a magnetization method on a small-size superconducting bulk magnet system", Physica C, Vol. 471, No.21-22, pp.901-904, 2011.11
T. Oka, H. Seki, T. Kimura, D. Mimura, S. Fukui, J. Ogawa, T. Sato, M. Ooizumi, H. Fujishiro, H. Hayashi, K. Yokoyama, C. Stiehler, "Magnetic separation technique for groundwater by five HTS melt-processed bulk magnets arranged in a line", Physica C, Vol. 471, No.21-22, pp.1506-1510, 2011.11
K. Yokoyama, T. Oka, K. Noto, "Performance of Trapped Magnetic Field in Superconducting Bulk Magnets Activated by Pulsed Field Magnetization", IEEE Trans. on Applied Superconductivity, Vol. 21, No.3, pp.1657-1660, 2011.6
T. Oka, H. Seki, S. Fukui, J. Ogawa, T. Sato, K. Yokoyama,"Evaluation of Pulsed-Field Magnetization on a Superconducting Bulk Magnet System Using a 13 K Refrigerator", IEEE/CSC & ESAS European Superconductivity News Forum (ESNF), No.15, pp.1-4, 2011.1
K. Yokoyama, T. Oka, K. Noto, "Development of a Small-Size Superconducting Bulk Magnet System Using a 13 K Refrigerator", IEEE Trans. Appl. Superconduct., vol.20, pp.973-976, 2010.6
K. Yokoyama, T. Oka, K. Noto, "Evaluation of magnetic force distribution on a pair of superconducting bulk magnets", Physica C, vol.470, pp.1201-1206, 2010.5
T. Oka, K. Tanaka, T. Kimura, D. Mimura, S. Fukui, J. Ogawa, T. Sato, M. Ooizumi, K. Yokoyama, M. Yamaguchi, "Magnetic separation technique for environmental water purification by strong magnetic field generator loading HTS bulk magnets", Physica C, Vol.470, pp.1799-1803, 2010.5
K. Yokoyama, T. Oka, K. Noto, "Development of a small-size superconducting bulk magnet system especially designed for a pulsed-field magnetization", Physica C, vol.469, pp.1282-1285, 2009.10
K. Yokoyama, R. Igarashi, T. Togasaki, T. Oka, "Pulsed Field Magnetization Characteristics of a Holed Superconducting Bulk Magnet", 27th International Symposium on Superconductivity (ISS2014), SAP-73, Tokyo, Japan, 2014.11
T. Oka, Y. Takahashi, T. Kanai, J. Ogawa, S. Fukui, T. Sato, K. Yokoyama, T. Nakamura, "Magnetic Field Uniformity in the Space between Face-to-Face HTS Bulk Magnets for NMR Application", 27th International Symposium on Superconductivity (ISS2014), PC-19, Tokyo, Japan, 2014.11
K. Yokoyama, R. Igarashi, R. Togasaki, T.o Oka, "Improvement of the trapped field performance of a holed superconducting bulk magnet", Applied Superconductivity Conference (ASC2014), 3LPo1L-03, Charlotte NC, USA, 2014.8
T. Oka, T. Kibushi, H. Ota, J. Ogawa, S. Fukui, T. Sato, K. Yokoyama, A. Murakami, M. Langer, "Preferential Magnetic Flux Invasion and Heat Generation Owing to Macrostructure in HTS Bulk Magnets in Pulse Field Magnetization Processes", Applied Superconductivity Conference (ASC2014), 4MPo2B-06, Charlotte NC, USA, 2014.8
K. Yokoyama, T. Tsukui, H. Mita, N. Tsubonoya, T. Oka, "Investigation of the flux flow inhibiting effect of a hole-opened superconducting bulk magnet", 26th International Symposium on Superconductivity (ISS2013), SAP-104, Tokyo, Japan, 2013.11
T. Oka, Y. Yamada, T. Horiuchi, J. Ogawa, S. Fukui, T. Sato, K. Yokoyama, M. Langer, "Pulsed-field invasion to anisotropic-grown HTS bulk magnets with varied seed-crystal positions and numbers", 26th International Symposium on Superconductivity (ISS2013), PCP-49, Tokyo, Japan, 2013.11
K. Yokoyama, T. Tsukui, H. Mita, N. Tsubonoya, T. Oka, "Evaluation of the trapped field performance of a hole-opened superconducting bulk magnet", 23rd International Conference on Magnet Technology (MT23), 3PoAP-04, Boston MA, USA, 2013.7
T. Oka, E. Hirayama, T. Kanai, J. Ogawa, S. Fukui, T. Sato, K. Yokoyama, T. Nakamura, "Strong Magnetic Field Generators Containing HTS Bulk magnets and Compact Refrigerators, and Their Field-Trapping Performances", 23rd International Conference on Magnet Technology (MT23), 3PoAP-09, Boston MA, USA, 2013.7
K. Yokoyama, T. Oka, N. Kondo, S. Hosaka, "Experimental verification of the magnetic flux penetration property and a flux flow inhibition effect of a superconducting bulk magnet with small holes", 25th International Symposium on Superconductivity (ISS2012), SAP-75, Tokyo, Japan, 2012.12
T. Oka, D. Ishiduka, J. Ogawa, S. Fukui, T. Sato, K. Yokoyama, A. Murakami, H. Stopfel, "Flux-Invading Behaviors and Temperature Changes in Dy123 Bulk Magnet in Iterative Pulse Field Magnetization Process", 25th International Symposium on Superconductivity (ISS2012), PCP-9, Tokyo, Japan, 2012.12
K. Yokoyama, T. Oka, N. Kondo, S. Hosaka, "Evaluation of pulsed-field magnetization of a bulk superconductor with small holes", Applied Superconductivity Conference (ASC2012), 2MPN-01, Portland, USA, 2012.10
T. Oka, D. Mimura, H. Fukazawa, S. Fukui, J. Ogawa, T. Sato, M. Ooizumi, T. Terasazwa, M. Tsujimura, K. Yokoyama, "Recycling Ni-bearing Precipitates from Electroless Plating by Magnetic Separation Using HTS Bulk Magnet", Applied Superconductivity Conference (ASC2012), 2JPA-05, Portland, USA, 2012.10
T. Oka, Y. Yamada, D. Ishiduka, J. Ogawa, S. Fukui, T. Sato, K. Yokoyama, "Magnetic Field-Trapping Properties of Melt-Processed RE123 Bulk Superconductors Activated by Pulsed-Field Magnetizing Method", IUMRS-International Conference on Electronic Materials (IUMRS-ICEM 2012), Yokohama, Japan, 2012.9
T. Oka, K. Yokoyama, H. Nabana, Y. Yamada, J. Ogawa, S. Fukui, T. Sato, "Magnetic flux penetration behavior and its composition dependence of melt-processed HTS bulk magnets", 10th International Conference on Materials and Mechanisms of Superconductivity?High Temperature Superconductors M2S-HTSC(X), P3-117, Washington DC, US, 2012.7
T. Oka, H. Fukazawa, S. Fukui, J. Ogawa, T. Sato, M. Ooizumi, K. Yokoyama, M. Tsujimura, "High Magnetic Field Separation Technique by HTS Bulk Magnet for Ni Precipitates from Electroless Plating Waste", 1st China-Japan Symposium on Architectural Planning and Design Research, Harbin Institute of Technology, Harbin, China, 2012.7
N. Kawasaki, S. Uehara, S. Fukui, J. Ogawa, T. Sato, T. Terasawa, Y. Itoh, K. Yokoyama, T. Oka, "Experimental and numerical analysis of flux dynamics in a rare-earth permanent magnet magnetized by intense static fields generated by HTS bulk magnets", International Cryogenic Engineering Conference 24-International Cryogenic Materials Conference (ICEC 24 - ICMC 2012), 17P-P07-08, Fukuoka, 2012.5
T. Oka, D. Ishiduka, T. Otsuka, J. Ogawa, S. Fukui, T. Sato, K. Yokoyama, A. Murakami,"Magnetic and thermal properties of HTS bulk magnet with reduced voids in the pulsed-field magnetizing process", International Conference on Superconductivity and Magnetism (ICSM2012), S-I-288, Istanbul, Turkey, 2012.4
N.Kondo, K.Yokoyama, S.Hosaka, "Magnetic separation of organic dyes using superconducting bulk magnets and magnetic activated carbon", International Conference on Advanced Micro-Device Engineering (AMDE 2011), P37, Gunma, Japan, 2011.12
K.Yokoyama, T.Oka, N.Kondo, S.Hosaka, "Pulsed-field magnetization of a bulk superconductor with small holes", 24th International Symposium on Superconductivity (ISS2011), SAP-95, Tokyo, Japan, 2011.10
N.Kondo, S.Hosaka, K.Yokoyama, "Fundamental study on magnetic separation of organic dyes using superconducting bulk magnets", 24th International Symposium on Superconductivity (ISS2011), SAP-75, Tokyo, Japan, 2011.10
T.Oka, T.Kimura, D.Mimura, H.Fukazawa, S.Fukui, J.Ogawa, T.Sato, M.Ooizumi, K.Yokoyama, M.Tsujimura, T.Terasawa, "Magnetic Separation for Ni Precipitates from Plating Waste Solution Using HTS Bulk Magnet", 24th International Symposium on Superconductivity (ISS2011), SA-5, Tokyo, Japan, 2011.10
K.Yokoyama, T.Oka, K.Noto, "Pulsed-field magnetization of a superconducting bulk magnet after field-cooling using a permanent Magnet", 22nd International Conference on Magnet Technology (MT22), 4FP1-1, Marseille, France, 2011.9
T.Oka, H.Seki, D.Ishiduka, J.Ogawa, S.Fukui, T.Sato, K.Yokoyama, A.Murakami, "Field trapping property of HTS bulk magnet with reduced voids in pulsed", 26th International Conference on Low Temperature Physics (LT26), 16P-B094, Beijing, China, 2011.8