Abstract
The EPR spectrum of crystals of CsCd doped with small amounts of (≃ 0.1-at.% ) is dominated by resonances arising from weakly coupled pairs. The analysis of the spectrum shows the exchange interaction to be antiferromagnetic but extremely weak ( ). The pair seems to consist of two ions associated with a ion vacancy. The unusual stability of this type of pair apparently arises from the charge balance requirements of the CsCd lattice which has a linear-chain CsNi-type structure. The formation of - pairs in the CsCd crystals can be inhibited by the presence of other trivalent ions and small monovalent ions.
- Received 20 September 1976
DOI:https://doi.org/10.1103/PhysRevB.16.1889
©1977 American Physical Society