高橋 有紀子

研究成果

年別の研究成果 2000 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2018 2019 2020 2021 2022 2023

• 212 Article
• 17 Conference contribution
• 4 Review article
• 3 Chapter
• 4 その他
  • 3 Comment/debate
  • 1 Conference article

年別の研究成果

年別の研究成果

検索結果

• 2009

  Spin polarization of Co-Fe alloys estimated by point contact Andreev reflection and tunneling magnetoresistance

  Karthik, S. V., Nakatani, T. M., Rajanikanth, A., Takahashi, Y. K. & Hono, K., 2009, In: Journal of Applied Physics. 105, 7, 07C916.

  研究成果: Article › 査読

  • polarization 100%
  • electrodes 57%
  19 被引用数 (Scopus)

• Spin polarization of Fe₄N thin films determined by point-contact Andreev reflection

  Narahara, A., Ito, K., Suemasu, T., Takahashi, Y. K., Ranajikanth, A. & Hono, K., 2009, In: Applied Physics Letters. 94, 20, 202502.

  研究成果: Article › 査読

  • polarization 100%
  • thin films 95%
  • molecular beam epitaxy 52%
  61 被引用数 (Scopus)

• Suppression of magnon excitations in Co₂MnSi Heusler alloy by Nd doping

  Rajanikanth, A., Takahashi, Y. K. & Hono, K., 2009, In: Journal of Applied Physics. 105, 6, 063916.

  研究成果: Article › 査読

  • transport properties 100%
  • retarding 95%
  • grain boundaries 93%
  • polarization 67%
  • excitation 61%
  9 被引用数 (Scopus)

• Transmission electron microscopy investigation of CoFeB/MgO/CoFeB pseudospin valves annealed at different temperatures

  Karthik, S. V., Takahashi, Y. K., Ohkubo, T., Hono, K., Ikeda, S. & Ohno, H., 2009, In: Journal of Applied Physics. 106, 2, 023920.

  研究成果: Article › 査読

  • transmission electron microscopy 100%
  • annealing 54%
  • crystallization 46%
  • temperature 45%
  • tunnel junctions 31%
  83 被引用数 (Scopus)
• 2008

  Boron segregation in crystallized MgO/amorphous- Co40 Fe40 B20 thin films

  You, C. Y., Ohkubo, T., Takahashi, Y. K. & Hono, K., 2008, In: Journal of Applied Physics. 104, 3, 033517.

  研究成果: Article › 査読

  • boron 100%
  • crystallization 89%
  • thin films 59%
  • transmission electron microscopy 30%
  • borides 28%
  42 被引用数 (Scopus)

• Current-perpendicular-to-plane giant magnetoresistance in spin-valve structures using epitaxial Co₂ FeAl_0.5 Si_0.5 /Ag/ Co₂ FeAl_0.5 Si_0.5 trilayers

  Furubayashi, T., Kodama, K., Sukegawa, H., Takahashi, Y. K., Inomata, K. & Hono, K., 2008, In: Applied Physics Letters. 93, 12, 122507.

  研究成果: Article › 査読

  • single crystals 100%
  • electrodes 99%
  • room temperature 89%
  • polarization 86%
  148 被引用数 (Scopus)

• Effect of base pressure on the structure and magnetic properties of FePt thin films

  Asthana, A., Takahashi, Y. K., Matsui, Y. & Hono, K., 2008 2月, In: Journal of Magnetism and Magnetic Materials. 320, 3-4, p. 250-256 7 p.

  研究成果: Article › 査読

  • base pressure 100%
  • Magnetic properties 87%
  • Thin films 68%
  • Magnetic Property 58%
  • Annealing 57%
  9 被引用数 (Scopus)

• Exchange bias of spin valve structure with a top-pinned Co40 Fe40 B20 IrMn

  You, C. Y., Goripati, H. S., Furubayashi, T., Takahashi, Y. K. & Hono, K., 2008, In: Applied Physics Letters. 93, 1, 012501.

  研究成果: Article › 査読

  • spacers 100%
  • annealing 57%
  50 被引用数 (Scopus)

• L1₀ FePt-C nanogranular perpendicular anisotropy films with narrow size distribution

  Peruma, A., Takahashi, Y. K. & Hono, K., 2008 10月, In: Applied Physics Express. 1, 10, p. 1013011-1013013 3 p.

  研究成果: Article › 査読

  • Anisotropy 100%
  • Coercive force 67%
  • anisotropy 61%
  • Nanoparticles 47%
  • Particle size 45%
  53 被引用数 (Scopus)

• Microstructure and magnetic properties of FePt-SiO2 granular films with Ag addition

  Seki, T. O., Takahashi, Y. K. & Hono, K., 2008, In: Journal of Applied Physics. 103, 2, 023910.

  研究成果: Article › 査読

  • grain size 100%
  • magnetic properties 93%
  • microstructure 78%
  • gas pressure 63%
  • standard deviation 61%
  52 被引用数 (Scopus)

• Microstructure of CoNiFeB electroless-deposited soft magnetic underlayer for perpendicular recording media

  Takahashi, Y. K., Hono, K., Ishii, M., Itoh, S. & Ohashi, K., 2008 2月, In: Journal of Magnetism and Magnetic Materials. 320, 3-4, p. 490-495 6 p.

  研究成果: Article › 査読

  • recording 100%
  • Electroless plating 85%
  • Microstructure 85%
  • microstructure 74%
  • plating 69%
  3 被引用数 (Scopus)

• Particulate structure of L 10 ordered ultrathin FePt films for perpendicular recording

  Perumal, A., Takahashi, Y. K., Seki, T. O. & Hono, K., 2008, In: Applied Physics Letters. 92, 13, 132508.

  研究成果: Article › 査読

  • particulates 100%
  • recording 78%
  • magnetic recording 56%
  • coercivity 46%
  • magnetic properties 34%
  76 被引用数 (Scopus)

• The effect of iron addition on the spin polarization and magnetic properties of Co₂CrGa Heusler alloy

  Nakatani, T. M., Gercsi, Z., Rajanikanth, A., Takahashi, Y. K. & Hono, K., 2008 11月 21, In: Journal of Physics D: Applied Physics. 41, 22, 225002.

  研究成果: Article › 査読

  • Spin polarization 100%
  • Spin Polarization 64%
  • Magnetic properties 58%
  • Iron 43%
  • Magnetic Property 38%
  19 被引用数 (Scopus)

• The enhancement of the spin polarization of Co₂ MnSn by Fe doping

  Rajanikanth, A., Takahashi, Y. K. & Hono, K., 2008, In: Journal of Applied Physics. 103, 10, 103904.

  研究成果: Article › 査読

  • augmentation 100%
  • polarization 88%
  11 被引用数 (Scopus)
• 2007

  Effect of Cr substitution for Fe on the spin polarization of Co2 Crx Fe1-x Si Heusler alloys

  Karthik, S. V., Rajanikanth, A., Nakatani, T. M., Gercsi, Z., Takahashi, Y. K., Furubayashi, T., Inomata, K. & Hono, K., 2007, In: Journal of Applied Physics. 102, 4, 043903.

  研究成果: Article › 査読

  • substitutes 100%
  • polarization 67%
  • metallicity 60%
  • electrodes 39%
  34 被引用数 (Scopus)

• Fabrication and characterization of Co-ferrite thin films for a ferromagnetic barrier in a spin-filtering device operating at room temperature

  Goto, R., Takahashi, Y. K., Tezuka, N., Inomata, K., Sugimoto, S. & Hono, K., 2007 6月, In: IEEE Transactions on Magnetics. 43, 6, p. 2797-2799 3 p.

  研究成果: Article › 査読

  • Magnetic Moment 100%
  • Ferrite 94%
  • Thin films 90%
  • Magnetic moments 74%
  • Fabrication 71%

• High spin polarization in a two phase quaternary Heusler alloy Co2 Mn Al1-X SnX

  Rajanikanth, A., Kande, D., Takahashi, Y. K. & Hono, K., 2007, In: Journal of Applied Physics. 101, 9, 09J508.

  研究成果: Article › 査読

  • quaternary alloys 100%
  • polarization 40%
  • dendrites 26%
  • solidification 22%
  • saturation 17%
  21 被引用数 (Scopus)

• Microstructure and spin polarization of quaternary Co₂Cr_1-xV_xAl, Co₂V_1-xFe_xAl and Co₂Cr_1-xFe_xAl Heusler alloys

  Karthik, S. V., Rajanikanth, A., Takahashi, Y. K., Ohkubo, T. & Hono, K., 2007 6月, In: Acta Materialia. 55, 11, p. 3867-3874 8 p.

  研究成果: Article › 査読

  • Spin polarization 100%
  • Spin Polarization 64%
  • Alloy 33%
  • Microstructure 32%
  • Saturation magnetization 20%
  52 被引用数 (Scopus)

• Microstructures and coercivities of SmCo_x and Sm(Co,Cu)₅ films prepared by magnetron sputtering

  Zhang, J., Takahashi, Y. K., Gopalan, R. & Hono, K., 2007 3月, In: Journal of Magnetism and Magnetic Materials. 310, 1, p. 1-7 7 p.

  研究成果: Article › 査読

  • Coercive force 100%
  • Magnetron sputtering 95%
  • Coercivity 83%
  • Magnetron Sputtering 82%
  • coercivity 66%
  33 被引用数 (Scopus)

• Spin polarization of Co2 MnGe and Co2 MnSi thin films with A2 and L 21 structures

  Rajanikanth, A., Takahashi, Y. K. & Hono, K., 2007, In: Journal of Applied Physics. 101, 2, 023901.

  研究成果: Article › 査読

  • polarization 100%
  • thin films 95%
  • temperature 55%
  • predictions 33%
  30 被引用数 (Scopus)

• Structural, magnetic and barrier properties for Co-ferrite thin films fabricated by plasma oxidization

  Goto, R., Takahashi, Y., Tezuka, N., Inomata, K., Sugimoto, S. & Hono, K., 2007 2月, In: Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals. 71, 2, p. 258-262 5 p.

  研究成果: Article › 査読

  Open Access

  • Magnetic properties 100%
  • Structural properties 89%
  • Ferrite 80%
  • Thin films 77%
  • Plasmas 75%
  1 被引用数 (Scopus)

• Structure, magnetic property, and spin polarization of Co2 FeAlx Si1-x Heusler alloys

  Nakatani, T. M., Rajanikanth, A., Gercsi, Z., Takahashi, Y. K., Inomata, K. & Hono, K., 2007, In: Journal of Applied Physics. 102, 3, 033916.

  研究成果: Article › 査読

  • magnetic properties 100%
  • polarization 76%
  • disorders 54%
  • stoichiometry 34%
  • electronic structure 26%
  155 被引用数 (Scopus)

• Transmission electron microscopy of Co₂(Cr_1-xFe_x)Al sputtered films and their magnetic tunneling junctions

  Takahashi, Y. K., Ohkubo, T., Hono, K., Okamura, S., Tezuka, N. & Inomata, K., 2007 6月, In: Journal of Magnetism and Magnetic Materials. 313, 2, p. 378-382 5 p.

  研究成果: Article › 査読

  • Transmission electron microscopy 100%
  • Tunneling 99%
  • Tunneling Magnetoresistance 78%
  • Tunnelling magnetoresistance 76%
  • Transmission Electron Microscopy 64%
  7 被引用数 (Scopus)
• 2006

  Coercivity control of FePt nanoparticles by interfacial disorder

  Takahashi, Y. K., Okamoto, S., Kitakami, O., Shimada, Y. & Hono, K., 2006 1月, In: Materials Transactions. 47, 1, p. 38-42 5 p.

  研究成果: Article › 査読

  Open Access

  • Coercive force 100%
  • Coercivity 83%
  • Nanoparticles 70%
  • Alumina 70%
  • coercivity 66%
  1 被引用数 (Scopus)

• Current-perpendicular-to-plane magnetoresistance in epitaxial Co ₂ MnSiCr Co₂ MnSi trilayers

  Yakushiji, K., Saito, K., Mitani, S., Takanashi, K., Takahashi, Y. K. & Hono, K., 2006 5月 29, In: Applied Physics Letters. 88, 22, 222504.

  研究成果: Article › 査読

  • buffers 100%
  • caps 62%
  • spacers 61%
  • products 38%
  • electrodes 36%
  125 被引用数 (Scopus)

• Magnetization reversal of FePt hard/soft stacked nanocomposite particle assembly

  Takahashi, Y. K., Hono, K., Okamoto, S. & Kitakami, O., 2006, In: Journal of Applied Physics. 100, 7, 074305.

  研究成果: Article › 査読

  • nanocomposites 100%
  • assembly 98%
  • nanoparticles 77%
  • magnetization 75%
  • composite materials 46%
  30 被引用数 (Scopus)

• Microstructure and magnetic properties of SmCo₅ thin films deposited on Cu and Pt underlayers

  Takahashi, Y. K., Ohkubo, T. & Hono, K., 2006, In: Journal of Applied Physics. 100, 5, 053913.

  研究成果: Article › 査読

  • magnetic properties 100%
  • coercivity 88%
  • microstructure 83%
  • thin films 73%
  • anisotropy 60%
  42 被引用数 (Scopus)

• Nucleation-type magnetization behavior in FePt (001) particulate films

  Shima, T., Takanashi, K., Takahashi, Y. K., Hono, K., Li, G. Q. & Ishio, S., 2006 2月 1, In: Journal of Applied Physics. 99, 3, 033516.

  研究成果: Article › 査読

  • particulates 100%
  • nucleation 74%
  • magnetization 64%
  • domain wall 61%
  • magnetic domains 36%
  30 被引用数 (Scopus)

• Particulate structure of FePt thin films enhanced by Au and Ag alloying

  You, C. Y., Takahashi, Y. K. & Hono, K., 2006, In: Journal of Applied Physics. 100, 5, 056105.

  研究成果: Article › 査読

  • particulates 100%
  • alloying 87%
  • thin films 51%
  • coercivity 46%
  • energy 14%
  60 被引用数 (Scopus)

• Preparation of monodisperse and highly coercive L1₀-FePt nanoparticles dispersible in nonpolar organic solvents

  Yamamoto, S., Morimoto, Y., Tamada, Y., Takahashi, Y. K., Hono, K., Ono, T. & Takano, M., 2006 10月 31, In: Chemistry of Materials. 18, 22, p. 5385-5388 4 p.

  研究成果: Article › 査読

  • Chlorine compounds 100%
  • Organic solvents 90%
  • Nanoparticles 63%
  • Chloroform 52%
  • Organic Solvent 47%
  38 被引用数 (Scopus)

• Self-assembled metallic nanoparticles for spin dependent single electron tunneling

  Ernult, F., Mitani, S., Takanashi, K., Takahashi, Y. K. & Hono, K., 2006 9月, In: Phase Transitions. 79, 9-10, p. 717-726 10 p.

  研究成果: Article › 査読

  • Electron tunneling 100%
  • electron tunneling 70%
  • Tunneling 65%
  • Nanoparticles 63%
  • Electron Spin 53%
  6 被引用数 (Scopus)

• Spin polarization of Co ₂FeSi full-heusler alloy and tunneling magnetoresistance of its magnetic tunneling junctions

  Gercsi, Z., Rajanikanth, A., Takahashi, Y. K., Hono, K., Kikuchi, M., Tezuka, N. & Inomata, K., 2006, In: Applied Physics Letters. 89, 8, 082512.

  研究成果: Article › 査読

  • polarization 100%
  • electrode materials 31%
  • oxides 16%
  • electrodes 16%
  • thin films 13%
  82 被引用数 (Scopus)

• Spin polarization of quaternary Co ₂Cr _1-xFe _xAl Heusler alloys

  Karthik, S. V., Rajanikanth, A., Takahashi, Y. K., Okhubo, T. & Hono, K., 2006, In: Applied Physics Letters. 89, 5, 052505.

  研究成果: Article › 査読

  • deviation 100%
  • predictions 75%
  • polarization 75%
  45 被引用数 (Scopus)
• 2005

  Control of the size for octahedral FePt nanoparticles and their magnetic properties

  Ito, H., Shima, T., Takanashi, K., Takahashi, Y. K. & Hono, K., 2005 10月, In: IEEE Transactions on Magnetics. 41, 10, p. 3373-3375 3 p.

  研究成果: Article › 査読

  • Magnetic properties 100%
  • Nanoparticles 81%
  • Magnetic Property 66%
  • Single crystals 47%
  • Nanoparticle 41%
  5 被引用数 (Scopus)

• Magnetic properties and microstructure of the granular films processed by annealing FePt-based multilayers

  Seki, T. O., Takahashi, Y. K. & Hono, K., 2005 10月, In: IEEE Transactions on Magnetics. 41, 10, p. 3799-3801 3 p.

  研究成果: Article › 査読

  • Magnetic properties 100%
  • Annealing 81%
  • Multilayers 79%
  • Multilayer 73%
  • Magnetic Property 66%
  4 被引用数 (Scopus)

• Magnetic properties and microstructures of Fe-Pt thin films sputter deposited under partial nitrogen gas flow

  You, C. Y., Takahashi, Y. K. & Hono, K., 2005 7月 1, In: Journal of Applied Physics. 98, 1, 013902.

  研究成果: Article › 査読

  • gas flow 100%
  • coercivity 81%
  • nitrogen 80%
  • magnetic properties 76%
  • microstructure 64%
  16 被引用数 (Scopus)

• Nanoconstricted structure for current-confined path in current-perpendicular-to-plane spin valves with high magnetoresistance

  Fukuzawa, H., Yuasa, H., Koi, K., Iwasaki, H., Tanaka, Y., Takahashi, Y. K. & Hono, K., 2005 5月 15, In: Journal of Applied Physics. 97, 10, 10C509.

  研究成果: Article › 査読

  • oxides 100%
  • conduction electrons 47%
  • products 44%
  • x ray spectra 27%
  • spectrum analysis 22%
  13 被引用数 (Scopus)

• On low-temperature ordering of FePt films

  Takahashi, Y. K. & Hono, K., 2005 8月, In: Scripta Materialia. 53, 4, p. 403-409 7 p.

  研究成果: Article › 査読

  • Liquid Film 100%
  • Temperature 82%
  • Grain Boundary 53%
  • Transmission electron microscopy 53%
  • Grain boundaries 52%
  60 被引用数 (Scopus)

• Self-alignment of Fe nanoparticles on a tunnel barrier

  Ernult, F., Mitani, S., Takanashi, K., Takahashi, Y. K., Hono, K., Takahashi, Y. & Matsubara, E., 2005 7月 18, In: Applied Physics Letters. 87, 3, 033115.

  研究成果: Article › 査読

  • self alignment 100%
  • tunnels 64%
  • nanoparticles 46%
  • electrodes 21%
  • oxides 14%
  9 被引用数 (Scopus)

• Size effect on the ordering of L10 FePt nanoparticles

  Miyazaki, T., Kitakami, O., Okamoto, S., Shimada, Y., Akase, Z., Murakami, Y., Shindo, D., Takahashi, Y. K. & Hono, K., 2005 10月 1, In: Physical Review B - Condensed Matter and Materials Physics. 72, 14, 144419.

  研究成果: Article › 査読

  • Order Parameter 100%
  • Electron beams 98%
  • Size Effect 94%
  • Nanoparticles 82%
  • Diffraction patterns 59%
  131 被引用数 (Scopus)

• Sm (Co,Cu)₅/Fe exchange spring multilayer films with high energy product

  Zhang, J., Takahashi, Y. K., Gopalan, R. & Hono, K., 2005 3月 21, In: Applied Physics Letters. 86, 12, p. 1-3 3 p., 122509.

  研究成果: Article › 査読

  • products 100%
  • coercivity 96%
  • demagnetization 61%
  • energy 45%
  • textures 43%
  148 被引用数 (Scopus)
• 2004

  Assembly of FePt L1₀ nanoparticles grown on MgO(110) with self-organized groove structure

  Okamoto, S., Kitakami, O., Miyazaki, T., Shimada, Y., Takahashi, Y. K. & Hono, K., 2004 11月 1, In: Journal of Applied Physics. 96, 9, p. 5217-5221 5 p.

  研究成果: Article › 査読

  • grooves 100%
  • assembly 85%
  • nanoparticles 67%
  • rocks 24%
  • periodic variations 22%
  8 被引用数 (Scopus)

• Coercivity exceeding 100 kOe in epltaxially grown FePt sputtered films

  Shima, T., Takanashi, K., Takahashi, Y. K. & Hono, K., 2004 9月 27, In: Applied Physics Letters. 85, 13, p. 2571-2573 3 p.

  研究成果: Article › 査読

  • coercivity 100%
  • sputtering 42%
  • magnetization 35%
  • anisotropy 34%
  • magnetic domains 29%
  219 被引用数 (Scopus)

• Fabrication of L₁₀ ordered FePt thin films with a canted easy magnetization axis on MgO (1 1 0) substrate

  Shima, T., Seki, T., Takanashi, K., Takahashi, Y. K. & Hono, K., 2004 5月, In: Journal of Magnetism and Magnetic Materials. 272-276, SUPPL. 1, p. e557-e559

  研究成果: Article › 査読

  • Magnetization 100%
  • Thin films 79%
  • Fabrication 62%
  • Substrates 59%
  • magnetization 55%
  9 被引用数 (Scopus)

• Influence of the buffer layers on magnetic properties of FePt (001) films sputter-deposited at reduced temperature

  Seki, T., Shima, T., Takanashi, K., Takahashi, Y., Matsubara, E., Takahashi, Y. K. & Hono, K., 2004 7月 15, In: Journal of Applied Physics. 96, 2, p. 1127-1132 6 p.

  研究成果: Article › 査読

  • buffers 100%
  • magnetic properties 83%
  • anisotropy 50%
  • temperature 35%
  • x ray diffraction 34%
  30 被引用数 (Scopus)

• Interfacial disorder in the L1₀ FePt particles capped with amorphous Al₂O₃

  Takahashi, Y. K. & Hono, K., 2004 1月 19, In: Applied Physics Letters. 84, 3, p. 383-385 3 p.

  研究成果: Article › 査読

  • disorders 100%
  • particulates 65%
  • purity 55%
  • sputtering 50%
  • single crystals 40%
  51 被引用数 (Scopus)

• Microstructure and magnetic properties of FePt and Fe/FePt polycrystalline films with high coercivity

  Takahashi, Y. K., Seki, T. O., Hono, K., Shima, T. & Takanashi, K., 2004 7月 1, In: Journal of Applied Physics. 96, 1, p. 475-481 7 p.

  研究成果: Article › 査読

  • particulates 100%
  • coercivity 92%
  • magnetic properties 69%
  • microstructure 58%
  • remanence 56%
  87 被引用数 (Scopus)

• Size dependence of ordering in FePt nanoparticles

  Takahashi, Y. K., Koyama, T., Ohnuma, M., Ohkubo, T. & Hono, K., 2004 3月 1, In: Journal of Applied Physics. 95, 5, p. 2690-2696 7 p.

  研究成果: Article › 査読
  160 被引用数 (Scopus)

• Spin-dependent single-electron-tunneling effects in epitaxial Fe nanoparticles

  Ernult, F., Yamane, K., Mitani, S., Yakushiji, K., Takanashi, K., Takahashi, Y. K. & Hono, K., 2004 4月 19, In: Applied Physics Letters. 84, 16, p. 3106-3108 3 p.

  研究成果: Article › 査読

  • electron tunneling 100%
  • tunnels 84%
  • nanoparticles 60%
  • stairways 56%
  • tunnel junctions 46%
  36 被引用数 (Scopus)
• 2003

  High coercivity and magnetic domain observation in epitaxially grown particulate FePt thin films

  Shima, T., Takanashi, K., Takahashi, Y. K., Hono, K., Li, G. Q. & Ishio, S., 2003 10月, In: Journal of Magnetism and Magnetic Materials. 266, 1-2, p. 171-177 7 p.

  研究成果: Article › 査読

  • Magnetic Domain 100%
  • Magnetic domains 96%
  • Coercive force 85%
  • Coercivity 71%
  • magnetic domains 67%
  30 被引用数 (Scopus)