| Original language | English |
|---|---|
| Pages (from-to) | 115-116 |
| Number of pages | 2 |
| Journal | Physics Letters |
| Volume | 11 |
| Issue number | 2 |
| DOIs | |
| State | Published - 15 Jul 1964 |
| Externally published | Yes |
Bibliographical note
Funding Information:The purpose of this note is to point out that all the data of ESR spectra of iron and rare earth group elements indicate that the host lattice of strontium oxide has a very weak cubic crystal field, probably one of the weakest crystal fields so far measured. This is consistent with the large lattice parameters of 5.08 A for SrO compared with that of 4.82 ~ and 4.20 ,~ for CaO and MgO, respectively. In the following discussion we shall confine the evidence to these spectra which show cubic or nearly cubic symmetry. Many ions show spectra with axial symmetry and their results will be described elsewhere in a more complete pre sentation. The data of the iron group elements are mainly confined to Cr 3+ and Mn 2+ and are given in table 1. For comparison we also list the g factors and the hyperfine structure constants in the other host lattices 1). For Cr 3+ the deviation of the g factor from 2.0023 is given approximately by Ag ~ ~/A where A is a measure of the se- * Supported in part by the Air Force Office of Scienti-fic Research, O.A.R., through the EuropeanOffice, Aerospace Research, United States Air Force. ** On leave of absence from the Hebrew University, Jerusalem, Israel. *** Supported by the Air Force Office of Scientific Re-search.