NO.    Title     Author    Publisher

23 High Field ESR System and Its Application to the Study of Quantum Spin
Sytems "H. Ohta, S. Okubo, S. Kimura, T. Tanaka, H. Kikuchi and H. Nagasaw"
Int. J. Infrared MMW 22(3) (2001) 387-391.

24 Submillimeter Wave ESR Measurements of Ca1-xCuO2 with Edge-sharing
CuO2 Chains "A. Ueda, H. Ohta, S. Okubo, Z. Hiroi, M. Okumura and M. Takano"
Appl. Magn. Reson. 19 (2000) 399-402.

25 Submillimeter wave ESR measurements of gapless S=1 antiferromagnetic
bond alternating chain system "H. Ohta, S. Okubo, S. Kimura, S. Takeda,
H. Kikuchi and H. Nagasawa" Physica B 284-288 (2000) 1627-1628.

26 High-field magnetization measurement of three-dimensional antiferromagnet
Nd2BaNiO5 single crysta "S. Okubo, H. Ohta, T. Tanaka, T. Yokoo and J.
Akimitsu" Physica B 284-288 (2000) 1475-1476.

27 Submillimeter Wave ESR Study of Spin Gap Excitations in CuGeO3 "H.
Nojiri, H. Ohta, S. Okubo, O. Fujita, J. Akimitsu and M. Motokawa" J.
Phys. Soc. Jpn. 68 (1999) 3417-3423.

28 Submillimeter Wave ESR Measurements of Low-Dimensional Quantum Spin
System "H. Ohta, S. Okubo, S. Kimura, T. Sakurai, S. Takeda, T. Tanaka,
H. Kikuchi and H. Nagasawa" Appl. Magn. Reson. 18 (2000) 469-474.

29 Metamagnetic Transition of Lu2Cu2O5 Studied by Submillimeter Wave ESR
Measurement "T. Goto, S. Kimura, S. Okubo, H. Ohta and M. Motokawa"
Appl. Magn. Reson. 18 (2000) 463-468.