"Romain  Gautier,Kengo Oka,Takumi Kihara,Nitesh Kumar,Athinarayanan Sundaresan,M  Tokunaga,Masaki Azuma,Kenneth R. Poeppelmeier","Spin Frustration from cis-Edge or -Corner Sharing Metal-Centered Octahedra",,"Journal of the american chemical society",,"Vol. 135",,"pp. 19268-19274",2013,Dec.
"Izabela Sosnowska,Masaki Azuma,Rados?aw Przenios?o,Dariusz Wardecki,Wei-tin Chen,Kengo Oka,Yuichi Shimakawa","Crystal and Magnetic Structure in Co-Substituted BiFeO<sub>3</sub>",,"Inorganic Chemistry",,"Vol. 52",,"pp. 13269-13277",2013,Nov.
"Ikuya YAMADA,Kentaro  SHIRO,Kengo OKA,Masaki AZUMA,Tetsuo IRIFUNE","Direct observation of negative thermal expansion in SrCu?Fe?O??",,"Journal of the Ceramic Society of Japan",,"Vol. 121","No. 1418","pp. 912-914",2013,Oct.
"‰ͺ Œ€Œα,“Œ ³Žχ,X –ΐΆ","BiCo<sub>1</sub>?<sub>x</sub>Fe<sub>x</sub>O<sub>3</sub> ‚Μ•ͺ‹Ι‰ρ“]Œ»Ϋ",,"“ϊ–{Œ‹»Šw‰οŽ",,"Vol. 55","No. 5","pp. 278-284",2013,Oct.
"Makoto Kubota,Kengo Oka,Hisato Yabuta,Kaoru Miura,Masaki Azuma","Structure and Magnetic Properties of BiFe<sub>1</sub>|<sub>x</sub>Co<sub>x</sub>O<sub>3 </sub>andBi<sub>0.9</sub>Sm<sub>0.1</sub>Fe<sub>1</sub>|<sub>x</sub>Co<sub>x</sub>O<sub>3</sub>",,"Inorganic Chemistry",,"Vol. 52",,"pp. 10698-10704",2013,Sept.
"V. R. Singh,V. K. Verma,K. Ishigami,G. Shibata,Y.   Yamazaki,A. Fujimori,Yukiharu Takeda,Tetsuo Okane,Yuji Saitoh,Hiroshi Yamagami,Y. Nakamura,M. Azuma,Y. Shimakawa","Enhanced ferromagnetic moment in Co-doped BiFeO<sub>3</sub> thin films studied by soft x-ray circular dichroism",,"JOURNAL OF APPLIED PHYSICS",,"Vol. 114",,"pp. 103905-1-6",2013,Sept.
"Hajime Hojo,Ko Onuma,Yuichi Ikuhara,Masaki Azuma","Effect of Oxygen Pressure on Electrical Properties of BiFe<sub>0.9</sub>Co<sub>0.1</sub>O<sub>3</sub> Thin Films Prepared by Pulsed Laser Deposition",,"Japanese Journal of Applied Physics",,"Vol. 52",,"pp. 09KD09-1-3",2013,Sept.
"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.
"Kengo Oka,Masaichiro Mizumaki,Chika Sakaguchi,Alexandra  Sinclair,Clemens  Ritter,J. Paul Attfield,Masaki Azuma","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",,"PHYSICAL REVIEW B",,"Vol. 88",,,2013,July
"Matteo dfAstuto,Ikuya Yamada,Paola Giura,Lorenzo Paulatto,Andrea Gauzzi,Moritz  Hoesch,Michael  Krisch,Masaki Azuma,Mikio Takano","Phonon anomalies and lattice dynamics in the superconducting oxychlorides Ca<sub>2</sub>|<sub>x</sub>CuO<sub>2</sub>Cl<sub>2</sub>",,"PHYSICAL REVIEW B",,"Vol. 88",,"pp. 014522",2013,July
"H. Wadati,K. Kato,Y.Wakisaka,T.Sudayama,D.G. Hawthorn,T.Z. Regier,N.Onishi,M. Azuma,Y.Shimakawa,T.Mizokawa,A. Tanaka,G.A. Sawatzky","Impact of Mn?O?O?Mn superexchange pathways in a honeycomb lattice Mn oxide with small charge-transfer energy",,"Solid State Communications",,"Vol. 162",,"pp. 18-22",2013,June
"Yutaka ITOH,Takato MACHI,Ikuya YAMADA,Masaki AZUMA,Mikio TAKANO","Cu NQR and NMR Studiesof Optimally Doped Ca<sub>2</sub>xNaxCuO<sub>2</sub>Cl<sub>2</sub>",,"Journal of the Physical Society of Japan",,"Vol. 82","No. 5",,2013,Apr.
"Yutaka ITOH,Takato MACHI,Ikuya YAMADA,Masaki AZUMA,Mikio TAKANO","Cu NQR and NMR Studies of Optimally Doped Ca<sub>2</sub>-<sub>x</sub>Na<sub>x</sub>CuO<sub>2</sub>Cl<sub>2</sub>",,"Journal of the Physical Society of Japan",,"Vol. 82",,"pp. 055001-1-2",2013,Apr.
"“Œ³Žχ","•‰‚Μ”M–c’£•¨ŽΏ",,"ƒpƒŠƒeƒB",,"Vol. 28","No. 1","pp. 27-29",2013,Jan.