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Phase transition in the mixed crystals Tb p Y 1− p AsO 4
Author(s) -
Schwab M.
Publication year - 1978
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.2220860122
Subject(s) - crystallography , phase transition , ion , crystal (programming language) , phase (matter) , chemistry , crystal structure , materials science , condensed matter physics , physics , organic chemistry , computer science , programming language
The energy of the four lowest crystal field levels of Tb 3+ in the mixed crystals Tb p Y 1− p AsO 4 is investigated in the range of the crystallographic and magnetic phase transition as a function of temperature and Tb‐concentration (0.2 < p ≦ 1). The results show that, in contrast to the magnetic ordering, the interaction causing the crystallographic transition is of long range and hence a simple molecular field theory fits the experimental data. For small Tb‐concentrations, the feature of this system are superimposed by effects of internal strains caused by the substitution of Tb 3+ by Y 3+ ions.