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Anomalous Larmour Frequency Dependence of Proton Spin–Lattice Relaxation Time (T 1 ) in the Ferroelectric Glycine Phosphite
Author(s) -
Kannan R.,
Ramesh K.P.,
Ramakrishna J.
Publication year - 2001
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/(sici)1521-3951(200105)225:1<157::aid-pssb157>3.0.co;2-l
Subject(s) - ferroelectricity , spin–lattice relaxation , proton , condensed matter physics , lattice (music) , relaxation (psychology) , proton spin crisis , atmospheric temperature range , materials science , glycine , frequency dependence , nuclear magnetic resonance , chemistry , physics , thermodynamics , quantum mechanics , dielectric , psychology , social psychology , optoelectronics , acoustics , biochemistry , amino acid
We report here the results of our 1 H NMR spin–lattice relaxation time ( T 1 ) studies in glycine phosphite which is ferroelectric below 224 K. The experiments have been carried out in the temperature range from 200 to 419 K and at two Larmour frequencies of 11.40 and 23.56 MHz. We have noticed a Larmour frequency dependence of T 1 on the high‐temperature side of the T 1 minimum. A model is proposed based on the BPP theory to explain the observation.