@article{CTT100886781,
  author = {Kengo. Oka and T. Ogawa and H. Yamamoto and Chika. Sakaguchi and R. Gallage and N. Kobayashi and Masaki  Azuma},
  title = {Compaction of α”-Fe<sub>16</sub>N<sub>2</sub> particles by high-pressure treatment at several gigapascals},
  journal = {Scripta Materialia},
  year = 2023,
}

@article{CTT100668094,
  author = {Kengo Oka and Koichiro Nabetani and Chika Sakaguchi and Hayato Seki and Michel  Czapski and Yuichi Shimakawa and Masaki Azuma},
  title = {Tuning negative thermal expansion in Bi<sub>1</sub>-<sub>X</sub>Ln<sub>X</sub>NiO<sub>3</sub>(Ln=La,Nd,Eu,Dy)},
  journal = {APPLIED PHYSICS LETTERS},
  year = 2013,
}

@article{CTT100667804,
  author = {Kengo Oka and Masaichiro Mizumaki and Chika Sakaguchi and Alexandra  Sinclair and Clemens  Ritter and J. Paul Attfield and Masaki Azuma},
  title = {Intermetallic charge-transfer transition in Bi<sub>1</sub>−<sub>x</sub>La<sub>x</sub>NiO<sub>3</sub> as the origin of the colossal negative thermal expansion},
  journal = {PHYSICAL REVIEW B},
  year = 2013,
}