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Experiments on the Zero‐Field Splitting of Trivalent Gadolinium
Author(s) -
Urban W.
Publication year - 1971
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.2220460214
Subject(s) - gadolinium , anisotropy , quadrupole , ion , hydrostatic pressure , interpretation (philosophy) , zero (linguistics) , field (mathematics) , chemistry , condensed matter physics , nuclear quadrupole resonance , materials science , nuclear magnetic resonance , atomic physics , physics , thermodynamics , optics , mathematics , linguistics , philosophy , organic chemistry , computer science , pure mathematics , programming language
The zero‐field resonance frequencies of Gd 3+ and their dependence on temperature and hydrostatic pressure have been measured on a set of nine isomorphic crystals having the zircon structure. It is shown that the volume effect on the quadrupole term b 2 0is much smaller than that produced by the change in local anisotropy of the gadolinium ion. The variety of data obtained fits qualitatively into this interpretation in terms of the dominating role of the quadrupole term. A qualitative microscopic model is suggested correlating the unit cell dimensions to the local anisotropy of the central ion.