@book{CTT100638597,
  author = {S. Okubo and K.  Hazuki and T. Sakurai and H. Ohta and H. Yoshida and M. Azuma and M. Takano},
  title = {Millimeter and Submillimeter wave ESR Measurement of Spin Ladder System Sr(Cu1-xZnx)2O3},
  publisher = {Elsevier Science B.V},
  year = 2002,
}

@article{CTT100920562,
  author = {S. Okubo and K. Segawa and K. Naka and T. Suzuki and S. Hara and T. Sakurai and H. Ohta and M. Matsumoto and N. Kurita and H. Tanaka},
  title = {High Frequency ESR Measurements of S=1 Spin Gap System CsFeCl3},
  journal = {JPS Conference Proceedings},
  year = 2023,
}

@article{CTT100814986,
  author = {R. Okuto and E. Ohki and Takahiro Sakurai and K. Hijii and H. Takahashi and Eiji Ohmichi and S. Okubo and H. Ohta and HIDEKAZU TANAKA},
  title = {Development of High‑Field and High‑Pressure ESR System and Application to Triangular Antiferromagnet CsCuCl3},
  journal = {Appl. Magn. Res.},
  year = 2019,
}

@article{CTT100714808,
  author = {T. Sakurai and K.  Fujimoto and R.  Matsui and K.  Kawasaki and S. Okubo and H. Ohta and K. Matsubayashi and Y. Uwatoko and H. Tanaka},
  title = {Development of multipfrequency ESR system for high-pressure measurements up to 2.5 GPa},
  journal = {J. Magn. Reson.},
  year = 2015,
}

@article{CTT100714790,
  author = {K. Matsui and M. Fujisawa and K.  Hagiwara and Y.  Hoshino and T. Goto and T. Sasaki and H. Tanaka and S. Okubo and H. Ohta},
  title = {Ground State of the Spin-1/2 Chain of Green Dioptase at High Fields},
  journal = {JPS Conf. Proc.},
  year = 2014,
}

@article{CTT100644973,
  author = {S. Okubo and Tomonari Ueda and H. Ohta and Weimin Zhang and T. Sakurai and Nozomi Onishi and Masaki Azuma and Yuichi Shimakawa and Hiroki Nakano and T. Sakai},
  title = {Dzyaloshinsky-Moriya interaction and field-induced magnetic order in an antiferromagnetic honeycomb lattice compound Bi3Mn4O12(NO3) studied by high-field electron spin resonance},
  journal = {PHYSICAL REVIEW B},
  year = 2012,
}

@article{CTT100714409,
  author = {Sonia Sharmin and I. Umegaki and H. Tanaka and T. Ono and G. Tanaka and H. Nojiri and M. Fujisawa and N. Matsumi and M. Tomoo and S. Okubo and H. Ohta and T. Sakurai},
  title = {Antiferromagnetic resonance modes for the S =1/2 kagome antiferromagnet Cs2Cu3SnF12},
  journal = {J. Phys: Conf. Ser.},
  year = 2011,
}

@article{CTT100714401,
  author = {T. Sakurai and T. Horie and M. Tomoo and K. Kondo and N. Matsumi and S. Okubo and H. Ohta and Y. Uwatoko and K. Kudo and Y. Koike and H. Tanaka},
  title = {Development of high-pressure, high-field and multi-frequency ESR apparatus and its application to quantum spin system},
  journal = {J. Phys: Conf. Ser.},
  year = 2010,
}

@article{CTT100598716,
  author = {M. Fujisawa and K. Shiraki and S. Okubo and H. Ohta and M. Yoshida and H. Tanaka and T. Sakai},
  title = {Dzyaloshinsky-Moriya interaction in the S=1/2 quasi one-dimensional antiferromagnet Cu<sub>2</sub>Cl<sub>4</sub>•H<sub>8</sub>C<sub>4</sub>SO<sub>2</sub> as determined via high frequency ESR},
  journal = {Phys. Rev. B},
  year = 2009,
}

@article{CTT100598838,
  author = {H. Ohta and M. Fujisawa and N. Souda and S. Okubo and E. Ohmichi and T. Sakurai and H. Kikuchi and Toshio Ono and H. Tanaka and K. Matsubayashi and Y. Uwatoko},
  title = {Magnetic Susceptibility Measurement Under High Pressure and Magnetization Measurement of S=1/2 Dioptase Lattice Antiferromagnet},
  journal = {J. Phys: Conf. Ser.},
  year = 2009,
}

@article{CTT100598842,
  author = {H. Ohta and S. Okubo and N. Souda and M. Tomoo and T. Sakurai and T. Yoshida and E. Ohmichi and M. Fujisawa and H. Tanaka and R. Kato},
  title = {Development and Applications of High-Frequency ESR up to 55 T},
  journal = {Appl. Magn. Reson.},
  year = 2009,
}

@article{CTT100626650,
  author = {H. Ohta and S. Okubo and K. Shiraki and Makoto Yoshida and A. A. Belik and M. Azuma and M. Takano},
  title = {High field ESR measurements on one dimensional antiferromagnetic zigzag chain systems.},
  journal = {J. Korean Phys. Soc},
  year = 2008,
}

@article{CTT100631013,
  author = {Shojiro Kimura and Hirofumi Ishikawa and Y. Inagaki and M. Yoshida and S. Okubo and H. Ohta and H. nojiri and A.A. Belik and M. Azuma and M. Takano},
  title = {ESR Measurements on One-Dimensional Quantum Ferrimagnets A3Cu3(PO4)4 with A=Sr and Ca in Submillimeter-Wave Region},
  journal = {J. Phys. Soc. Jpn.},
  year = 2006,
}

@article{CTT100626961,
  author = {A.A. Belik and M. Azuma and A. Matsuo and S. Okubo and H. Ohta and K. Kindo and M. Takano and Kaji},
  title = {Crystal Structure and Properties of Phosphate PbCu2(PO4)2 with Spin-Singlet Ground State},
  journal = {Phys. Rev., 73},
  year = 2006,
}

@article{CTT100630640,
  author = {Y. Inagaki and Y. Narumi and K. Kindo and H. Kikuchi and T. Kamikawa and T. Kunimoto and S. Okubo and H. Ohta and T. Saito and M. Azuma and M. Takano and H. Nojiri and M  Kaburagi and Takashi Tonegawa},
  title = {Ferro-Antiferromagnetic Delta-Chain System Studied by High Field Magnetization Measurements},
  journal = {J. Phys. Soc. Jpn.},
  year = 2005,
}

@article{CTT100632962,
  author = {S. Okubo and Akio Taketani and H. Ohta and T. Kunimoto and Y. Inagaki and T. Saito and M. Azuma and M. Takano and H. Kikuchi},
  title = {High Field ESR Measurements of S=1/2 Diamond Chain Substance Cu3(CO3)2(OH)2 at the Magenetization Plateau Region},
  journal = {Progress of Theoretical Physics Supplement},
  year = 2005,
}

@article{CTT100632966,
  author = {K. Shiraki and M. Yoshida and S. Okubo and H. Ohta and A.A. Belik and M. Azuma and M. Takano},
  title = {High Field ESR Measurements of MCuP2O7 (M=Sr, Pb)},
  journal = {Progress of Theoretical Physics Supplement},
  year = 2005,
}

@article{CTT100626957,
  author = {Kaji and S. Okubo and H. Ohta and Yuhji Inagaki and A.A. Belik and M. Azuma and M. Takano},
  title = {High Field ESR Measurements of Spin Gap System MCu2(PO4)2},
  journal = {J. Phys. & Chem. Solids,},
  year = 2005,
}

@article{CTT100630619,
  author = {A.A. Belik and M. Azuma and A. Matsuo and Whangbo M.-H. and Koo H.-J. and Kikuchi J. and Tomoyuki Kaji and S. Okubo and H. Ohta and K. Kindo and M. Takano},
  title = {Investigation of the Crystal Structure and the Structural and Magnetic Properties of SrCu2(PO4)2},
  journal = {Inorg. Chem.},
  year = 2005,
}

@article{CTT100632953,
  author = {Kensaku Hiraka and Yuta Nagasaka and T. Kunimoto and Y. Inagaki and S. Okubo and H. Ohta and T. Saito and M. Azuma and M. Takano},
  title = {Magnetic Phase Transition of High-Pressure Phase (VO)2P2O7 Studied by High-Field ESR Measurements},
  journal = {J. Mag. Mag. Mat.},
  year = 2004,
}

@article{CTT100627369,
  author = {H. Ohta and S. Okubo and Tomohisa Kamikawa and Takashi Kunimoto and Y. Inagaki and H. Kikuchi and T. Saito and M. Azuma and M. Takano},
  title = {High Field ESR Study of the S=1/2 Diamond-Chain Substance Cu3(CO3)2(OH)2 up to the Magnetization Plateau Region},
  journal = {J. Phys. Soc. Jpn.},
  year = 2003,
}

@article{CTT100632795,
  author = {T. Kamikawa and S. Okubo and T. Kunimoto and H. Ohta and Y. Inagaki and H. Kikuchi and T. Saito and M. Azuma and M. Takano},
  title = {High Field ESR Measurement of Diamond Chain Substance Cu3(OH)2(CO3)2},
  journal = {Physica B},
  year = 2003,
}

@article{CTT100632947,
  author = {T. Kunimoto and T. Kamikawa and Y. Inagaki and S. Okubo and H. Ohta and H. Kikuchi and T. Saito and M. Azuma and M. Takano},
  title = {ESR Study of Frustrared Δ-Chain System},
  journal = {Physica B},
  year = 2003,
}

@article{CTT100631825,
  author = {H. Ohta and S. Okubo and T. Sakurai and T. Goto and K. Kirita and K. Ueda and Y. Uwatoko and T. Saito and M. Azuma and M. Takano and J. Akimitsu},
  title = {High-Frequency ESR Measurements Using Pulsed Magnetic Fields in Kobe},
  journal = {Physica B},
  year = 2001,
}