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Orientationally Disordered Hydrogen. Freezing of Short‐Range Order
Author(s) -
Kokshenev V. B.
Publication year - 1991
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221640108
Subject(s) - spin isomers of hydrogen , polarization (electrochemistry) , hydrogen , short range order , solid hydrogen , condensed matter physics , molecule , range (aeronautics) , atmospheric temperature range , materials science , chemical physics , hydrogen molecule , molecular physics , chemistry , thermodynamics , crystallography , physics , organic chemistry , composite material
The RMS (root mean square) polarization magnitude of an orientationally disordered ortho‐parahydrogen mixture is analyzed in terms of a microscopic model. Various models of the quadrupolar glass theory are considered; the calculated orientational polarization values are compared with the data of the NMR absorption signal in hydrogen. It is found that fluctuations of the ortho‐hydrogen molecule crystalline field produce an essential effect on freezing of the short‐range orientational order at temperatures above 1 K.