Hidemi NAGAO, Hiroyuki KAWABE (Kinjo College), Takashi KAWAKAMI* (*Osaka Univ.), Mitutaka OKUMURA (Osaka Natl. Res. Inst.), Wasuke MORI (Kanagawa Univ.), Kiyoshi NISHIKAWA (Kanazawa Univ.) and Kizashi YAMAGUCHI*
[Mol. Cry. Liq. Cry. 286, 171 (1996)]
The path integral method is formulated by means of the extended Thouless parametrization. The ab initio Hamiltonian and the Zeeman Hamiltonian are used in our model systems. Numerical calculation of physical properties of molecules is performed in terms of the Monte Carlo method. The dependence of the magnetization of a hydrogen molecule on the division for the partition function, the temperature and the external magnetic field is discussed.