"Masaki Azuma,Kengo Oka,Koichiro Nabetani","Negative thermal expansion induced by intermetallic charge transfer",,"Science and Technology of Advanced Materials",,"Vol. 16",,"pp. 034904 1-8",2015,Sept.
"K. Nabetani,Y. Muramatsu,K. Oka,Kiho Nakano,H. Hojo,M. Mizumaki,A. Agui,Y.  Higo,N. Hayashi,M. Takano,M. Azuma","Suppression of temperature hysteresis in negative thermal expansion compound BiNi1− x Fe x O3 and zero-thermal expansion composite",,"APPLIED PHYSICS LETTERS",,"Vol. 106",,"pp. 061912",2015,
"奈部谷 光一郎,岡 研吾,東 正樹","BiNi<sub>1</sub>−<sub>x</sub>Fe<sub>x</sub>O<sub>3 </sub>のサイト間電荷移動誘起負の熱膨張における温度履歴の抑制",,"粉体および粉末冶金",,"Vol. 61","No. 1","pp. 35-37",2014,Jan.
"村松 裕也,奈部谷 光一郎,岡 研吾,東 正樹","巨大な負の熱膨張を示すペロブスカイトBiNiO<sub>3</sub> を用いたゼロ熱膨張コンポジットの作製",,"粉体および粉末冶金",,"Vol. 61","No. 1","pp. 39-43",2014,Jan.
"Kengo Oka,Koichiro Nabetani,Chika Sakaguchi,Hayato Seki,Michel  Czapski,Yuichi Shimakawa,Masaki Azuma","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)",,"APPLIED PHYSICS LETTERS",,"Vol. 103",,"pp. 061909-1-3",2013,Aug.