Abstract
The molecular based magnet Cs-I[(NiCrIII)-Cr-II(CN)(6)]. 2H(2)O is a ferromagnet with a Curie temperature T-c = 90 K. Its structure consists of face centered cubic lattice of Ni-II ions connected by Cr(CN)(6) entities. We have recorded X-ray Magnetic Circular Dichroism (XMCD) at the L(2,3) edges of Ni-II. It clearly evidences that nickel II is in a high spin configuration and ferromagnetically coupled to the surrounding Cr-III. Through Crystal Field Multiplet calculation we have determined the total magnetic moment carried by the Ni-II. By using sum rules derived for XMCD, it has been possible to extract the orbital and spin contributions to the total magnetic moment. A somewhat too small magnetic moment is found on nickel. A complete calculation taking into account the multiplet coupling effect and the covalent hybridization allowed to determine the precise ground state of nickel and showed that hybridization with surrounding nitrogen atoms is not responsible for the experimental low nickel magnetic moment.
| Original language | English |
|---|---|
| Pages (from-to) | 453-456 |
| Number of pages | 4 |
| Journal | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms |
| Volume | 97 |
| Issue number | 1-4 |
| Publication status | Published - May 1995 |
| Externally published | Yes |
| Event | 1st European Conference on Synchrotron Radiation in Materials Science - CHESTER, United Kingdom Duration: 3 Jul 1994 → 8 Jul 1994 |
Keywords
- ABSORPTION
- SPECTRA