Magnetic properties of layered perovskites NaLnTiO{sub 4} (Ln = Sm, Eu, and Gd)
- Hokkaido Univ., Sapporo (Japan)
The magnetic properties of the layered perovskite compounds NaLnTiO{sub 4} (Ln = Sm, Eu, and Gd) are reported. Their dc susceptibilities were measured from 4.5 to 320 K. The Moessbauer spectrum of {sup 151}Eu and the electron paramagnetic resonance (EPR) spectrum of Gd{sup 3+} were also measured at room temperature. NaEuTiO{sub 4} shows Van Vleck paramagnetism which corresponds to the singlet ground state {sup 7}F{sub 0} of Eu{sup 3+} ions, with a spin-orbit coupling constant {lambda} = 323 cm{sup {minus}1}. NaSmTiO{sub 4} also behaves as a Van Vleck paramagnet. The magnetic susceptibility of NaGdTiO{sub 4} follows the Curie law. The Moessbauer spectrum of NaEuTiO{sub 4} clearly shows that Eu is in the trivalent state, and a quadrupole interaction is found to exist in this compound. From the EPR measurement the g value of Gd{sup 3+} in NaGdTiO{sub 4} is determined to be 1.99. Both the magnetic susceptibility results and the EPR measurements show that Gd{sup 3+} ion in this compound is scarcely affected by the crystal field.
- OSTI ID:
- 651126
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 2 Vol. 138; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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