電子顕微鏡ユニット

原子レベル元素分布・構造解析用透過電子顕微鏡
Cs corrected Scanning Transmission Electron Microscope

Spectra Ultra S/TEM (Thermo Fisher Scientific)

千現地区 精密計測実験棟 127&105室 / Sengen-site, Physical Analysis Lab. #127&105


4.45 sradのEDS立体角（分析用二軸傾斜ホルダーでは4.04 sradの立体角）を有するUltra-X検出器を搭載し、加速電圧の切り替え能力により5分以内でレンズと試料ステージを安定状態にできるため、1セッションのなかで材料や観察目的に応じた最適な加速電圧でのS/TEM観察が可能です。

The SpectraUltra system can be operated at different voltages (30 ~ 300 kV) in a single microscopy session, and has a 4.45 srad EDS solid angle (4.04 srad solid angle with an analytical double tilt holder).

 

Specifications
Acc. Voltage 300, 200, 60, 30 kV
Corrector Cs probe corrector S-CORR
EDS Ultra-X (4.04 srad solid angle with an analytical double tilt holder)
EELS Gatan Continuum S/1077 30-300 kV
Detectors 16-segmented Panther STEM detector (BF/DF/HAADF)
DPC/iDPC imaging function
Ceta-S camera (CMOS 4k×4k), 40 fps at 4k×4k

Publications by using Spectra Ultra S/TEM

  1. "Tunable Entropy Oxides: A Pathway to Design Giant Dielectric Materials for Energy Harvesting", A.K. Sahu, A.M. Padhan, A. Radhakrishnan, S. Pandey, P. Dobbidi, J. Kumar, Y.K. Takahashi, P. Alagarsamy, Adv. Funct. Mater. , e18131 (2025)
  2. "Surface-Exposed Pd Nanocluster Confined within a Ring-Shaped Polyoxometalate for Selective Hydrogenation", R. Xi, K. Yonesato, T. Yatabe, Y. Koizumi, S. Kikkawa, S. Yamazoe, K. Harano, K. Yamaguchi, K. Suzuki, Adv. Sci. , e09418 (2025)
  3. "Programmed Assembly of IrAu12 Nanoclusters into Dimers and Trimers: Electron Microscopy Observation and Spectroscopic Characterization", Y. Fukumoto, S. Takano, Y. Asami, H. Hirai, K. Harano, T. Tsukuda, Nano Lett. 25, 12248-12254 (2025)
  4. "Achieving high-density L10-FePt granular films on an electrically conductive (Mg,Ti)O underlayer for HAMR media", A.R. Dilipan, H. Sepehri-Amin, I. Suzuki, Y.K. Takahashi, Scr. Mater. 268, 116885 (2025)
  5. "Observation of Atomic-Scale Structural Changes in Al2O3/GaN Interfacial Layers Prepared with a Dummy-SiO2 Process", J. Uzuhashi, Y. Irokawa, T. Nabatame, T. Ohkubo, and Y. Koide, ECS J. Solid State Sci. Technol. 14, 085001 (2025)
  6. "Er-driven magnetic tunability in FePt thin films investigated via high-throughput experiments and microstructure analysis for future HAMR media", D. Ogawa, H. Sepehri-Amin, Y.K. Takahashi, D. Ogawa, Y. Iwasaki, J. Uzuhashi, Y. Sasaki, M. Kotsugi, and Y.K. Takahashi, Appl. Phys. Lett. 126, 252405 (2025)
  7. "High entropy oxide epitaxial films with interface perpendicular magnetic anisotropy and tunnel magnetoresistance effect toward spintronic applications", R. Sihombing, T. Scheike, J. Uzuhashi, H. Yasufuku, T. Ohkubo, Z. Wen, S. Mitani, and H. Sukegawa, Mater. Today 88, 12-23 (2025)
  8. "Non-Equilibrium Magnon Engineering Enabling Significant Thermal Transport Modulation", T. Hirai, T. Morita, S. Biswas, J. Uzuhashi, T. Yagi, Y. Yamashita, K. Kumar Varun, F. Makino, R. Modak, Y. Sakuraba, T. Ohkubo, R. Guo, B. Xu, J. Shiomi, D. Chiba, and K. Uchida, Adv. Funct. Mater. , 2506554 (2025)
  9. "Tailoring the microstructure and formation of hexagonal-BN segregants in FePt-based granular films for improved HAMR media", D. Ogawa, H. Sepehri-Amin, Y.K. Takahashi, J. Alloys Compd. 1032, 180243 (2025)
  10. "Structural, optical, transport, and electronic properties of MgxZn1-xO (0 ≤ x ≤ 0.38) films pseudomorphically grown on Zn-polar ZnO substrates", Y. Kozuka, S. Tsuda, T. Phan, K. Yaji, J. Uzuhashi, T. Ohkubo, T. Hiroto, T. Makino, J. Falson, A. Tsukazaki, M. Kawasaki, Mater. Today Quantum 6, 100036 (2025)
  11. "Reversal of Spin-Torque Polarity with Inverting Current Vorticity in Composition-Graded Layer at the Ti/W Interface", H. Nakayama, T. Horaguchi, J. Uzuhashi, C. He, H. Sukegawa, T. Ohkubo, S. Mitani, K. Yamanoi, and Y. Nozaki, Adv. Electron. Mater. 11, 2400797 (2025)
  12. "Ultrathin CoPt alloy films with fcc (111) orientation and perpendicular magnetic anisotropy fabricated by electrodeposition", D. Araki, Y. Sonobe, Y.K. Takahashi, T. Homma, Electrochem. Commun. 176, 107938 (2025)
  13. "Impact of GdOx insertion on magnetic anisotropy and damping in double-barrier magnetic stacks", J. Kim, T. Nozaki, J. Uzuhashi, S. Tamaru, T. Ichinose, T. Ochiai, T. Yamamoto, T. Ohkubo, K. Yakushiji and S. Yuasa, APL Mater. 13, 031102 (2025)
  14. "Development of L10-ordered FePt with low damping and large perpendicular magnetic anisotropy by engineering the nanostructure", P.D. Bentley, Y. Sasaki, I. Suzuki, S. Isogami, Y.K. Takahashi, H. Suto, Appl. Phys. Lett. 126, 022404 (2025)
  15. "Ultra-low Gilbert damping and self-induced inverse spin Hall effect in GdFeCo thin films", J. Pradhan, M.S. Devapriya, R. Mondal, J. Uzuhashi, T. Ohkubo, S. Kasai, C. Murapaka, A. Haldar, J. Appl. Phys. 136, 203903 (2024)
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