138.　High field ESR study of one-dimensional S=1/2 Heisenberg antiferromagnet with next-nearest exchange interaction
H. Ohta, S. Takano, S. Okubo, M. Yoshida, H. Kikuchi
J. Magn. Magn. Mater. 310 (2007) 1234-1235

139.　High field ESR studies of layered manganese oxides A4Mn3O10 (A=Ba, Sr)
N. Souda, W. Zhang, T. Sakurai, S. Okubo, H. Ohta, K. Nishimura, H. Sakurai, K. Yoshimura, E. Takayama-Muromachi
J. Magn. Magn. Mater. 310 (2007) 1829-1831

140.　High-frequency ESR measurements of the Co spinel compound SiCo2O4
W. Zhang, S. Okubo, H. Ohta, T. Saito and M. Takano
J. Phys.: Condens. Mater 19 (2007) 145264-1-6

141.　Submillimeter and millimeter wave ESR study of manganese spinel compound LiMn2O4
S. Takano, T. Kaji, S. Okubo, H. Ohta, M. Yoshida, S. Kimura, R. Dziembaj, M. Molenda, C. Rudowicz, Y. Inagaki and T. Asano
J. Phys.: Cond. Matt. 19 (2007) 145266/1-6

142.　Development of high-pressure, high-field and multifrequency electron spin resonance system
T. Sakurai, A. Taketani, T. Tomita, S. Okubo, H. Ohta, Y. Uwatoko
Rev. Sci. Inst. 78 (2007) 065107/1-6

143.　Analysis of the temperature dependence of the high-frequency EMR spectra of Mn ions in the lithium-ion battery material LiMn2O4
A.Rudowicz, I. Stefaniuk, R. Dziembaj, H. Ohta, M. Molenda, S. Okubo and M. Yoshida
Res. Chem. Intermed. 33(8-9) (2007) 853-862.

144.　Anomalous Polarization Characteristics of Magnetic Resonance in a Quasi-One-Dimensional CuGeO3: Co Magnet
S. V. Demishev, A. V. Semeno, H. Ohta, S. Okubo, I. E. Tarasenko, T. V. Ishchenko,N. A. Samarin, and N. E. Sluchanko
Phys. Solid State 49 (2007) 1295–1304.

145.　Observation of Direct Transitions in the Ferromagnetic and Antiferromagnetic Dimer System (CH3)2NH2CuCl3 by High-Field ESR
M. Yoshida, Y. Kitano, Y. Inagaki, T. Sakurai, M. Kimata, S. Okubo, H. Ohta, K. Koyama, M. Motokawa, T. Asano, Y. Ajiro
J. Phys. Soc. Jpn. 76 (2007) 113704/1-4.