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Effect of Manganese Impurities on the Phase Transition Sequence in BCCD
Author(s) -
Ribeiro J. L.,
Chaves M. R.,
Almeida A.,
Müser H. E.,
Albers J.,
Klöpperpieper A.
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.2221630220
Subject(s) - impurity , ionic radius , manganese , phase transition , pyroelectricity , analytical chemistry (journal) , phase (matter) , dielectric , betaine , ferroelectricity , ionic bonding , materials science , crystallography , chemistry , ion , condensed matter physics , physics , optoelectronics , organic chemistry , chromatography , metallurgy , biochemistry
Pyroelectric and dielectric constant measurements to study the effect of Mn impurities on the phase transition sequence of betaine calcium chloride dihydrate (BCCD) were used. Mixed crystals of B(C 1‐ x Mn x )CD are grown from solutions with molar ratios of 5 and 20% of Mn. The chemical analysis of these crystals reveals compositions corresponding to x = 0.01 and x = 0.05, respectively. Replacing Ca by an ion with a smaller ionic radius is expected to induce local strains and local electric charges. The effect of the substitutional disorder on the different modulated commensurate phases is dicussed.