"Koomok Lee,Hena Das,Yuki Sakai,Takumi Nishikubo,Kei Shigematsu,Daiki Ono,Takehiro Koike,Naomi Kawamura,Masaichiro Mizumaki,Naoki Ishimatsu,Masaki Azuma","High-spin C?o<sup>3+</sup> as a trigger of weak ferromagnetism in Co-substituted BiFe?O<sub>3</sub>",,"Physical Review B",,"  110","  2","  024422",2025,July
"¬’r„‘ε,DASHENA,‰ͺŒ€Œα,‘–μŒ\O,Fernando Cubillas,Francisco B.  Bojorqez,Victor Emmanuel  Alvarez-Montano,ˆΙ“‘”Ι˜a,dΌŒ\,Hayato  Togano,ŽR“cŠτ–η,Ξ‹΄L‹L,‹v•Ϋ“c‰ΐŠξ,X–ΐΆ,Noboru  Kimizuka,“Œ³Žχ","Pressure-Induced YbFe2O4-Type to Spinel Structural Change of InGaMgO4",,"Solids",,"Vol. 5","no. 3","pp. 422-433",2024,Aug.
"¬’r „‘ε,Ό‹v•Ϋ  ,Žπˆδ —YŽχ,“Œ ³Žχ","K<sub>2</sub>NiF<sub>4</sub>Œ^‰»‡•¨Sr<sub>2</sub>CrO<sub>4</sub>ESr<sub>2</sub>CoO<sub>4</sub>‚̍‚ˆ³‡¬‚Ζ”M–c’£•]‰Ώ","‘ζ62‰ρƒZƒ‰ƒ~ƒbƒNƒXŠξ‘b‰ΘŠw“’˜_‰ο",,,,,,2024,
"¬’r „‘ε,Ό‹v•Ϋ  ,Žπˆδ —YŽχ,“Œ ³Žχ","K<sub>2</sub>NiF<sub>4</sub>Œ^‰»‡•¨Sr<sub>2</sub>CrO<sub>4</sub>ESr<sub>2</sub>CoO<sub>4</sub>‚̍‚ˆ³‡¬‚Ζ”M–c’£•]‰Ώ","‘ζ62‰ρƒZƒ‰ƒ~ƒbƒNƒXŠξ‘b‰ΘŠw“’˜_‰ο",,,,,,2024,
"Koomok Lee,Hena Das,Yuki Sakai,Takumi Nishikubo,Kei Shigematsu,Daiki Ono,Takehiro Koike,Naomi Kawamura,Masaichiro Mizumaki,Naoki Ishimatsu,Masaki Azuma","Material Design for Low Power Consumption Multiferroic Memory using High Spin Co<sup>3+</sup> substituted BiFeO3","‘ζ15‰ρέ“ϊ‰Θ‹¦‡“―•ͺ‰Θ‰ο",,,,,,2024,
"Koomok Lee,Hena Das,Yuki Sakai,Takumi Nishikubo,Kei Shigematsu,Daiki Ono,Takehiro Koike,Naomi Kawamura,Masaichiro Mizumaki,Naoki Ishimatsu,Masaki Azuma","Emergence of weak ferromagnetism in High Spin Co<sup>3+</sup> substituted BiFeO3","The 22nd Japan-Korea-Taiwan Symposium on Strongly Correlated Electron Systems (JKT22)",,,,,,2024,
"ŽO‘ξ ,¬’r „‘ε,Ό‹v•Ϋ  ,Žπˆδ —YŽχ,“Œ ³Žχ","”ρ»ŽΏ‘O‹μ‘Μ‚π—p‚’‚½K<sub>2</sub>NiF<sub>4</sub>Œ^•‰”M–c’£ή—Ώ‚̍‡¬‚¨‚ζ‚Ρ’Tυ","•²‘Μ•²–––θ‹ΰ‹¦‰ο2023”N“xH‹G‘ε‰ο",,,,,,2023,
"Masayuki Fukuda,Hidenobu Murata,Takumi Nishikubo,Qiumin Liu,Koomok Lee,Takehiro Koike,Yuma Takahashi,Saori I. Kawaguchi,Naohisa Hirao,Hiroshi Funakubo,Masaki Azuma","Suppression of Pressure-Induced Phase Transitions in a Monoclinically Distorted LiNbO<sub>3</sub>-Type CuNbO<sub>3</sub> by Preference for a CuO<sub>3</sub> Triangular Coordination Environment",,"Inorganic Chemistry",,"  61","  32","  12719-12725",2022,Aug.
"Takehiro Koike,Takumi Nishikubo,Yuki Sakai,Hirofumi Ishii,Masaki Azuma","Negative thermal expansion in PbTiO<sub>3</sub>-type perovskites oxide Bi<sub>0.5+x</sub>Na<sub>0.5|x</sub>VO<sub>3</sub>",,"Journal of the Ceramic Society of Japan?",,"  130","  8","  691-695",2022,Aug.
"Shiori Kihara,Yuki Sakai,Shogo Wakazaki,Takumi Nishikubo,Takehiro Koike,Ko Mibu,Hongwu Yu,Yoichi Okimoto,Shin-ya Koshihara,Masaki Azuma","Bi<sub>0.5</sub>Pb<sub>0.5</sub>FeO<sub>3 </sub>with Unusual Pb Charge Disproportionation: Indication of a Systematic Charge Distribution Change in Bi<sub>0.5</sub>Pb<sub>0.5</sub>MO<sub>3 </sub>(M: 3d Transition Metal)",,"Inorganic Chemistry",,"  61","  32","  12822-12827",2022,Aug.
"Harry W. T. Morgan,Takafumi Yamamoto,Takumi Nishikubo,Takuya Ohmi,Takehiro Koike,Yuki Sakai,Masaki Azuma,Hirofumi Ishii,Genki Kobayashi,John E. McGrady","Sequential Pressure-Induced B1|B2 Transitions in the AnionOrdered Oxyhydride Ba<sub>2</sub>YHO<sub>3</sub>",,"Inorganic Chemistry",,"  61","  18","  7043-7050",2022,Apr.
"Zhao Pan,Koike Takehiro,Takumi Nishikubo,Lei Hu,Qiumin Liu,Yuki Sakai,Shogo Kawaguchi,Masaki Azuma","Realization of Negative Thermal Expansion in Lead-Free Bi<sub>0.5</sub>K<sub>0.5</sub>VO<sub>3 </sub>by the Suppression of Tetragonality",,"Inorganic Chemistry",,"  61","  8","  3730?3735",2022,Feb.
"¬’r „‘ε,“Œ ³Žχ,Ό‹v•Ϋ  ,Žπˆδ —YŽχ","PbTiO<sub>3</sub> Œ^ƒyƒƒuƒXƒJƒCƒgŽ_‰»•¨Bi<sub>0.5+x</sub>Na<sub>0.5-x</sub>VO<sub>3</sub>‚Μ•‰”M–c’£","•²‘Μ•²–––θ‹ΰt‹G‘ε‰ο",,,,,,2022,
"¬’r „‘ε,Ό‹v•Ϋ  ,Žπˆδ —YŽχ,“Œ ³Žχ","PbTiO<sub>3</sub> Œ^ƒyƒƒuƒXƒJƒCƒgŽ_‰»•¨Bi<sub>0.5+x</sub>Na<sub>0.5-x</sub>VO<sub>3</sub>‚Μ•‰”M–c’£","“ϊ–{ƒZƒ‰ƒ~ƒbƒNƒX‹¦‰ο‘ζ35‰ρH‹GƒVƒ“ƒ|ƒWƒEƒ€",,,,,,2022,