In:
physica status solidi (b), Wiley, Vol. 242, No. 12 ( 2005-10), p. 2417-2426
Abstract:
The M and 1 H spin–lattice relaxation rates in MHSO 4 (M = K, Rb, Cs, and NH 4 ) single crystals were measured over a wide temperature range. The temperature dependences of the 1 H spin–lattice relaxation rates in RbHSO 4 and NH 4 HSO 4 can be explained by using the Bloembergen–Purcell–Pound theory while the temperature dependence of the 1 H spin–lattice relaxation rate in KHSO 4 cannot. Also, the relaxation process for M in MHSO 4 crystals differs depending on M. It is well known that the characteristic features of MHSO 4 crystals depend on whether M is K, Rb, Cs or NH 4 ; specifically, NH 4 HSO 4 and RbHSO 4 exhibit ferroelectricity but KHSO 4 and CsHSO 4 do not. Consequently, although the MHSO 4 crystals considered here are all members of the alkali acid sulfate family, our relaxation rate results varied depending on the mechanism of the ionic motion. This suggests that the differences in the chemical properties of M (= K, Rb, Cs, and NH 4 ) are responsible for the variations of the natures of the phase transitions in these crystals. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Type of Medium:
Online Resource
ISSN:
0370-1972
,
1521-3951
DOI:
10.1002/pssb.v242:12
DOI:
10.1002/pssb.200540083
Language:
English
Publisher:
Wiley
Publication Date:
2005
detail.hit.zdb_id:
208851-4
detail.hit.zdb_id:
1481096-7
