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Proton Spin–Lattice Relaxation Study of NH 4 + Motion in Ammonium‐Doped Ferroelectric RbH 2 PO 4
Author(s) -
Blinc R.,
Lahajnar G.,
Levstik A.,
Osredkar R.,
Shuvalov L. A.
Publication year - 1974
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.2220650138
Subject(s) - ferroelectricity , zeeman effect , proton , spin–lattice relaxation , dipole , relaxation (psychology) , proton spin crisis , dielectric , ammonium , doping , ion , materials science , analytical chemistry (journal) , condensed matter physics , nuclear magnetic resonance , chemistry , physics , magnetic field , psychology , social psychology , optoelectronics , organic chemistry , quantum mechanics , chromatography
The temperature dependences of the proton Zeeman and dipolar spin–lattice relaxation rates have been measured in a Rb 1– x (NH 4 ) x H 2 PO 4 mixed single crystal both in the paraelectric and the ferroelectric phase. The correlation time for ammonium ion reorientation has been determined and it is found that ultraslow reorientational motion of the H 2 PO 4 groups exists above room temperature.