Updated on 2025/03/31

写真a

 
OSHIMA Daiki
 
Organization
Graduate School of Engineering Electronics 2 Associate professor
Undergraduate School
School of Engineering Electrical Engineering, Electronics, and Information Engineering
Title
Associate professor

Degree 1

  1. 博士（工学） （ 2014.3   名古屋大学 ） 

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Research Interests 2

  1. スピンデバイス

  2. 磁気記録

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Professional Memberships 3

  1. The Institute of Electrical and Electronics Engineers

  2. 日本磁気学会

  3. 電気学会

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Awards 3

  1. 令和5年度 秀でた利用成果 優秀賞

    2023.12   文部科学省マテリアル先端リサーチインフラ   非空間反転対称磁性体の作製と新規スピン光機能の探索

    松原正和、本田杏奈、大島大輝、加藤剛志

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    Country：Japan

  2. マグネティックス技術委員会研究奨励賞

    2020.2   電気学会   熱処理したFe304/Cr スパッタ 積層膜の垂直磁気異方性

    大島　大輝

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    Award type：Award from Japanese society, conference, symposium, etc.  Country：Japan

  3. 電気学会 基礎・材料・共通部門 平成28年優秀論文発表賞

    2016   電気学会   MnGa膜を用いたイオン照射型ビットパターン媒体の高密度化の検討

    大島大輝

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    Award type：Award from Japanese society, conference, symposium, etc.  Country：Japan

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Papers 51

  1. Electrodeposition and microstructural characterization of CoPt ultrathin films with perpendicular magnetic anisotropy Reviewed

    Suzuki, R; Saito, M; Oshima, D; Kato, T; Sakata, K; Amemiya, K; Homma, T

    ELECTROCHIMICA ACTA   Vol. 523   2025.5

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  2. Field-Free switching of Antiferromagnetically Coupled Co/Pd-Based perpendicular multi-layer via combined spin torques Reviewed

    Pan, D; Yabushita, R; Oshima, D; Kato, T

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS   Vol. 618   2025.4

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  3. Artificial control of layer thickness in Co-Pt alloy multilayer nanowires fabricated by dual-bath electrodeposition in nanoporous polycarbonate membranes Reviewed

    Kawana, R;Oguchi N; Oshima, D;Yoshida, M; Sugiura, T;Saito, M; Homma, T; Kato, T; Ono, T; Shima, M; Yamada, K

        2025.3

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    Language：English  

    DOI： 10.35848/1882-0786/adbcf6

  4. Green synthesized CoFe2O4/rGO nanocomposites utilizing plant leaf extracts as magnetically separable and reusable photocatalysts for organic toxic dye degradation Reviewed

    Larasati, DA; Puspitarum, DL; Istiqomah, NI; Zurnansyah; Mahardhika, LJ; Rini, NP; Oshima, D; Kato, T; Partini, J; Suharyadi, E

    JOURNAL OF WATER PROCESS ENGINEERING   Vol. 69   2025.1

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  5. Strain detection based on magnetic domain wall motion in amorphous FeSiBNb thin film Reviewed

    Maeno, K; Fujiwara, Y; Jimbo, M; Oshima, D; Kato, T

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS   Vol. 611   2024.12

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Presentations 45

  1. グレースケール露光とイオン照射を組み合わせた磁気パターニング手法の検討

    大島大輝、加藤剛志

    IEEE Magnetics Society 名古屋支部若手研究会  2024.1.31 

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    Event date： 2024.1

    Presentation type：Oral presentation (general)  

  2. Ion implantation into magnetic thin films through the microstructured resist masks International conference

    D. Oshima, T. Kato

    International Conference on Materials and Systems for Sustainability 2023  2023.12.2 

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    Event date： 2023.12

    Language：English   Presentation type：Poster presentation  

  3. グレースケール露光とイオン照射による磁性積層膜の磁気特性制御

    大島大輝、加藤剛志

    電気学会マグネティックス研究会  2023.11.13 

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    Event date： 2023.11

    Presentation type：Oral presentation (general)  

  4. ビスマス置換磁性ガーネットの磁気回転比向上に関する研究

    朝野航，西敬生，大島大輝，加藤剛志，李基鎮，河原正美，西川雅美，石橋隆幸

    第70回応用物理学会春季学術講演会  2023.3.17 

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    Event date： 2023.3

    Language：Japanese   Presentation type：Oral presentation (general)  

  5. Fabrication of beta-Mn type CoZnMn(001) film on MgO single crystal substrate International conference

    D. Oshima, R. Mitsuhashi, N. Ikarashi, T. Kato, M. Nagao

    The 67th Annual Conference on Magnetism and Magnetic Materials  2022.11.3 

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    Event date： 2022.10 - 2022.11

    Presentation type：Poster presentation  

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KAKENHI (Grants-in-Aid for Scientific Research) 7

  1. hydrodynamic transport properties of high-density skyrmion flows

    Grant number：21H01029  2021.4 - 2024.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Nagao Masahiro

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    Authorship：Coinvestigator(s) 

    The study focused on the motion of high-density skyrmion states based on hydrodynamics. Initially, using the sputtering method, skyrmion-hosting Ta(5)/Co20Fe60B20(1)/Ta(0.08)/MgO(2)/Ta(5) multilayers were prepared. However, it was challenging to achieve high-density skyrmions using these multilayers. As a result, the study explored different multilayers, specifically Pt/Co/Ta, but encountered similar difficulties. Nevertheless, by adjusting sputtering conditions, the study successfully enhance the Dzyaloshinskii-Moriya interaction, leading to the generation of spontaneous skyrmions. This breakthrough also facilitated the detection of reading error-detectable in racetrack memory.

  2. Enhancement of spin orbit torque by introducing the broken inversion symmetry and development of 3-dimensional magenetic memory

    Grant number：20H02182  2020.4 - 2023.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Kato Takeshi

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    Authorship：Coinvestigator(s) 

    Spin Orbit Torque (SOT) switching is considered as a promising way of the next generation writing scheme of the magnetic random access memories. This study focused on the relationship between SOT switching current density and structural inversion symmetry of the magnetic materials, and Gd/FeCo multilayers with graded layered thickness and Tb/Gd/FeCo multilayers were investigated. The SOT switching current density of Gd/FeCo multilayers decreased with increasing the gradient of the layer thickness of the multilayer. Moreover, in Tb/Gd/FeCo multilayers, the SOT switching current density decreased with increasing Tb layer thickness, even though the effective perpendicular anisotropy increased. These results suggest the increase of the broken inversion symmetry along film normal direction decreases the SOT switching current density.

  3. Fabrication of artificial multilayer using ferromagnetic oxide and its application to voltage-driven memory devices

    Grant number：19K15044  2019.4 - 2021.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Early-Career Scientists

    Oshima Daiki

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    Authorship：Principal investigator 

    Grant amount：\4160000 （ Direct Cost: \3200000 、 Indirect Cost：\960000 ）

    For application to voltage-driven magnetic memories, ferromagnetic-oxide / ferromagnetic-metal / nonmagnetic metal repetition layer structure was fabricated by magnetron sputtering method, and the magnetic property and the crystal structure of the samples were evaluated. Zn ferrite, used as a ferromagnetic-oxide, was epitaxially grown on ferromagnetic FeCo / nonmagnetic W buffer layers. Perpendicular magnetic anisotropy, which is important for memory applications, was confirmed in the repetition multilayer. There is the possibility that the proposed structure is available in the magnetic memories.

  4. Magnetization switching by spin current induced by ultra short pulse laser

    Grant number：17K18878  2017.6 - 2019.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Challenging Research (Exploratory)

    Kato Takeshi

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    Authorship：Coinvestigator(s) 

    In order to observe spin current generation by the ultra short pulse laser and the magnetization switching by the spin current, two experiments, 1) spin current injection to Au from 3d transition metal Fe and 2) magnetization switching of GdFeCo by injecting the spin current, were carried out. Fe thickness dependence of the damping constant of Fe showed the Au layer has useful properties as a spin current conductor. When the spin current injected to GdFeCo, the moment of GdFeCo feels large equivalent magnetic field around the compensation composition. Moreover, it was found that the injected spin current exerts a torque to only FeCo moment.

  5. Local magnetization control using spin Hall effect and its application to GMR magnetic sensors

    Grant number：17H03249  2017.4 - 2020.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Iwata Satoshi

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    Authorship：Coinvestigator(s) 

    In this research project, we have developed strain-sensor using giant magnetoresistance effect, where inverse magneto-striction effect is applied to the magnetic free layer in a spin valve structure. In order to avoid from influence of magnetic stray field, we employ sinusoidal signal detection method, where the magnetization direction of the magnetic free layer was modulated by alternative magnetic field by flowing AC current through Al strip line formed on GMR element. In next stage, we have investigated magnetization control by spin-Hall effect. The sensor device is composed from Ta/FeCo layer for producing spin current, a magnetoresistive spin-valve element and anti-ferromagneic NiO layer which magnetically connects Ta/FeCo and spin-valve layers. In this device, magnetization reversal by spin Hall effect was observed.

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Teaching Experience (On-campus) 6

  1. 電気電子情報工学実験第１

    2022

  2. 電気電子情報工学実験第２

    2022

  3. 電気磁気学基礎演習

    2015

  4. 電気電子工学実験

    2015

  5. 電気磁気学基礎演習

    2014

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