First- and Corresponding-Author Publications

• 11. Electrical Conductivity of Hydrous SiO2: Implications for the Superionic State and High Conductivity Anomalies Beneath Subduction Zones

Mako Inada*, Yoshiyuki Okuda*, Kenta Oka, Hideharu Kuwahara, Steeve Gréaux, Kei Hirose (2025)

Journal of Geophysical Research: Solid Earth, 130, e2025JB032641. https://doi.org/10.1029/2025JB032641

• 10. Electrical Conductivity of Dense MgSiO3 Melt Under Static Compression

Yoshiyuki Okuda*, Kei Hirose, Kenji Ohta, Saori I. Kawaguchi, Kenta Oka (2024)

Geophysical Research Letters, 51, e2024GL109741.  https://doi.org/10.1029/2024GL109741

• 9. Novel non-Joule heating technique: externally laser-heated diamond anvil cell

Yoshiyuki Okuda*, Kenta Oka, Koutaro Hikosaka, Kei Hirose (2023)

Review of Scientific Instruments, 94, 043901. https://doi.org/10.1063/5.0122111

• 8. Heat flow from the Earth’s core inferred from experimentally determined thermal conductivity of the deep lower mantle

Yoshiyuki Okuda, Kenji Ohta* (2023) 

AGU books, Chapter "Core-Mantle Coevolution: A Multidisciplinary approach". https://doi.org/10.1002/9781119526919.ch8

• 7. High-P-T impedance measurements using a laser-heated diamond anvil cell

Yoshiyuki Okuda*, Kenta Oka, Yusuke Kubota, Mako Inada, Naoki Kurita, Kenji Ohta, Kei Hirose (2022)

Review of Scientific Instruments, 93, 105103. https://doi.org/10.1063/5.0097883

• 6. Low-spin ferric iron in primordial bridgmanite crystallized from a deep magma ocean

Yoshiyuki Okuda*, Kenji Ohta, Yu Nishihara, Naohisa Hirao, Tatsuya Wakamatsu, Sho Suehiro, Saori I Kawaguchi,  Yasuo Ohishi (2021) 

Scientific Reports, 11, 19471. https://doi.org/10.1038/s41598-021-98991-w

• 5. A cylindrical SiC heater for an externally heated diamond anvil cell to 1500 K

Yoshiyuki Okuda*, Seiji Kimura, Kenji Ohta, Yohan Park, Tatsuya Wakamatsu, Izumi Mahino, Kei Hirose (2021)

Review of Scientific Instruments, 92,  015119. https://doi.org/10.1063/5.0036551

• 4. Anomalous compressibility in (Fe,Al)-bearing bridgmanite: implications for the spin state of iron

Yoshiyuki Okuda*, Kenji Ohta, Ryosuke Sinmyo, Kei Hirose, Saori I. Kawaguchi, Yasuo Ohishi (2020)

Physics and Chemistry of Minerals, 47, 40. https://doi.org/10.1007/s00269-020-01109-3

• 3. Thermal conductivity of Fe-bearing post-perovskite in the Earth's lowermost mantle

Yoshiyuki Okuda*, Kenji Ohta, Akira Hasegawa, Takashi Yagi, Kei Hirose, Saori I. Kawaguchi, Yasuo Ohishi (2020)

Earth and Planetary Science Letters, 547, 116466. https://doi.org/10.1016/j.epsl.2020.116466

• 2. Effect of spin transition of iron on the thermal conductivity of (Fe, Al)-bearing bridgmanite

Yoshiyuki Okuda*, Kenji Ohta, Ryosuke Sinmyo, Kei Hirose, Takashi Yagi, Yasuo Ohishi (2019)

Earth and Planetary Science Letters, 520, 188-198. https://doi.org/10.1016/j.epsl.2019.05.042

• 1. The effect of iron and aluminum incorporation on lattice thermal conductivity of bridgmanite at the Earth’s lower mantle

Yoshiyuki Okuda*, Kenji Ohta*, Takashi Yagi, Ryosuke Sinmyo, Tatsuya Wakamatsu, Kei Hirose, Yasuo Ohishi (2017)

Earth and Planetary Science Letters, 474, 25-31. https://doi.org/10.1016/j.epsl.2017.06.022

Other Publications

• 7. Observation of hot dense H2O phases through non-time-resolved and time-resolved X-ray diffraction measurements in a laser-heated diamond anvil cell

Kenta Iwamatsu, Yoshiyuki Okuda, Saori Kawaguchi-Imada, Kenji Ohta* (2024)

Physical Review B, 110, 134115. https://doi.org/10.1103/PhysRevB.110.134115

• 6. Photoinduced electronic conduction in silver iodide under high pressure

Tomoaki Kimura*, Hiroki Kubota, Yoshiyuki Okuda, Yuki Shibazaki, Masafumi Sakata, Shigeo Sasaki (2024)

The Journal of Physical Chemistry, 128, 15704-15709. https://doi.org/10.1021/acs.jpcc.4c04753

• 5. Near-infrared focused heating method for the rotational diamond anvil cell

Shintaro Azuma*, Keishi Okazaki, Kentaro Uesugi, Masahiro Yasutake, Bunrin Natsui, Eranga Jayawickrama, Keiya Ishimori, Yoshiyuki Okuda, Yohan Park, Ryuichi Nomura (2024)

Review of Scientific Instruments, 95, 073907. https://doi.org/10.1063/5.0202913

• 4. Leveraging oxide reactive sputtering for thermal insulation in laser-heated diamond anvil cell

Kenta Oka*, Mako Inada, Yoshiyuki Okuda, Kei Hirose (2024)

High Pressure Research, 44, 159-167. https://doi.org/10.1080/08957959.2024.2346171

• 3. Measuring the Electrical Resistivity of Liquid Iron to 1.4 Mbar

Kenji Ohta*, Sho Suehiro, Saori I. Kawaguchi, Yoshiyuki Okuda, Tatsuya Wakamatsu, Kei Hirose, Yasuo Ohishi, Manabu Kodama, Shuichiro Hirai, Shintaro Azuma (2023)

Physical Review Letters, 130, 266301. https://doi-org.utokyo.idm.oclc.org/10.1103/PhysRevLett.130.266301

• 2. Melting phase relations in Fe-Si-H at high pressure and implications for Earth’s inner core crystallization

Koutaro Hikosaka, Shoh Tagawa, Kei Hirose*, Yoshiyuki Okuda, Kenta Oka, Koichiro Umemoto, Yasuo Ohishi (2022) 

Scientific Reports, 12, 10000. https://doi.org/10.1038/s41598-022-14106-z

• 1. Composition and pressure dependence of lattice thermal conductivity of (Mg,Fe)O solid solutions

Akira Hasegawa*, Kenji Ohta, Takashi Yagi, Kei Hirose, Yoshiyuki Okuda, Tadashi Kondo (2019)

Comptes Rendus Geoscience, 351, 229-235. https://doi.org/10.1016/j.crte.2018.10.005