Orientational Phase Transition in Molecular Crystal N_2

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概要

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• The orientational phase transition of the solid N2 is studied on the basis of the statisticaltheory for orientational rotators with multiple directions. The orientational field hindering freerotation of the nonpolar diatomic molecvxle N3 is assumed to be caused by the 6 -12 Lennard-Jones potential. The naolectnle N2 can point to one of four orientations along the cube bodydiagonals. It is shown that the four molecules in a unit cell take the cv-form structure with thecrystal symmetry Pa3 at the grotmnd state, which forms the sublattices consisting of four simplecubic lattice. The temperature dependence of the orientational order paranaeter is obtained inthe molecular field approximation. It is shown that the first order phase transition takes placein the solid N7.

• 1997-01-15

著者

• Kondo Hironobu

  Depatment Of Applied Physics Okayama University Of Science

• Fujii Katsuhiko

  Depatment Of Applied Physics Okayama University Of Science

• FUKA Tamayo

  Depatment of Applied Physics,Okayama University of Science

• ISHII Kazuo

  Depatment of Applied Physics,Okayama University of Science

• Fuka Tamayo

  Depatment Of Applied Physics Okayama University Of Science

• Ishii Kazuo

  Depatment Of Applied Physics Okayama University Of Science

関連論文

• Orientational Phase Transition in Molecular Crystal N_2

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