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/sup 14/N nuclear quadrupole resonance in ferroelectric sodium nitrite NaNO/sub 2/

Journal Article:

Abstract

Nuclear quadrupole resonance has been studied in ferroelectric sodium nitrite (NaNO/sub 2/) from 77 K to its phase transition point 437 K. The three rotational frequencies ..omega../sub c/ = 190 cm/sup -1/, ..omega../sub b/ = 120 cm/sup -1/ and ..omega../sub c/ = 227 cm/sup -1/ and their temperature variation when fitted in the Bayer-Kushida theory predict the temperature dependence of nqr frequencies reasonably well. A second order phase transition is found to occur at 180 K which is in confirmity with the one found earlier from thermal expansion and dielectric studies. The shift in resonance frequencies is seen to occur mainly by rotation around the 'c' axis and hence it is inferred that the mechanism of polarization reversal is intimately connected with orientational motion about 'c' axis. (auth)
Authors:
Singh, S; Singh, K [1] 
  1. Defence Science Lab., Delhi (India)
Publication Date:
Jun 01, 1974
Product Type:
Journal Article
Reference Number:
EDB-76-036716
Resource Relation:
Journal Name: J. Phys. Soc. Jpn.; (Japan); Journal Volume: 36:6
Subject:
36 MATERIALS SCIENCE; NITROGEN 14; NUCLEAR QUADRUPOLE RESONANCE; SODIUM COMPOUNDS; PHASE TRANSFORMATIONS; FERROELECTRIC MATERIALS; LOW TEMPERATURE; MEDIUM TEMPERATURE; NITRITES; NITROGEN COMPOUNDS; OXYGEN COMPOUNDS; ROTATIONAL STATES; TEMPERATURE DEPENDENCE; VIBRATIONAL STATES; ALKALI METAL COMPOUNDS; DIELECTRIC MATERIALS; ENERGY LEVELS; EXCITED STATES; ISOTOPES; LIGHT NUCLEI; MATERIALS; NITROGEN ISOTOPES; NUCLEI; ODD-ODD NUCLEI; RESONANCE; STABLE ISOTOPES; 360603* - Materials- Properties
OSTI ID:
7197313
Country of Origin:
Japan
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: JUPSA
Submitting Site:
INIS
Size:
Pages: 1588-1592
Announcement Date:

Journal Article:

Citation Formats

Singh, S, and Singh, K. /sup 14/N nuclear quadrupole resonance in ferroelectric sodium nitrite NaNO/sub 2/. Japan: N. p., 1974. Web.
Singh, S, & Singh, K. /sup 14/N nuclear quadrupole resonance in ferroelectric sodium nitrite NaNO/sub 2/. Japan.
Singh, S, and Singh, K. 1974. "/sup 14/N nuclear quadrupole resonance in ferroelectric sodium nitrite NaNO/sub 2/." Japan.
@misc{etde_7197313,
title = {/sup 14/N nuclear quadrupole resonance in ferroelectric sodium nitrite NaNO/sub 2/}
author = {Singh, S, and Singh, K}
abstractNote = {Nuclear quadrupole resonance has been studied in ferroelectric sodium nitrite (NaNO/sub 2/) from 77 K to its phase transition point 437 K. The three rotational frequencies ..omega../sub c/ = 190 cm/sup -1/, ..omega../sub b/ = 120 cm/sup -1/ and ..omega../sub c/ = 227 cm/sup -1/ and their temperature variation when fitted in the Bayer-Kushida theory predict the temperature dependence of nqr frequencies reasonably well. A second order phase transition is found to occur at 180 K which is in confirmity with the one found earlier from thermal expansion and dielectric studies. The shift in resonance frequencies is seen to occur mainly by rotation around the 'c' axis and hence it is inferred that the mechanism of polarization reversal is intimately connected with orientational motion about 'c' axis. (auth)}
journal = {J. Phys. Soc. Jpn.; (Japan)}
volume = {36:6}
journal type = {AC}
place = {Japan}
year = {1974}
month = {Jun}
}