TY - JOUR
T1 - Soft X-ray magnetic circular dichroism in molecular based magnets
AU - Arrio, M. A.
AU - Sainctavit, Ph
AU - Cartier dit Moulin, Ch
AU - Brouder, Ch
AU - de Groot, F. M.F.
AU - Mallah, T.
AU - Verdaguer, M.
PY - 1995/5/2
Y1 - 1995/5/2
N2 - The molecular based magnet CsI[NiIICrIII(CN)6]·2H2O is a ferromagnet with a Curie temperature TC = 90 K. Its structure consists of face centered cubic lattice of NiII ions connected by Cr(CN)6 entities. We have recorded X-ray Magnetic Circular Dichroism (XMCD) at the L2,3 edges of NiII. It clearly evidences that nickel II is in a high spin configuration and ferromagnetically coupled to the surrounding CrIII. Through Crystal Field Multiplet calculation we have determined the total magnetic moment carried by the NiII. 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.
AB - The molecular based magnet CsI[NiIICrIII(CN)6]·2H2O is a ferromagnet with a Curie temperature TC = 90 K. Its structure consists of face centered cubic lattice of NiII ions connected by Cr(CN)6 entities. We have recorded X-ray Magnetic Circular Dichroism (XMCD) at the L2,3 edges of NiII. It clearly evidences that nickel II is in a high spin configuration and ferromagnetically coupled to the surrounding CrIII. Through Crystal Field Multiplet calculation we have determined the total magnetic moment carried by the NiII. 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.
UR - https://www.scopus.com/pages/publications/0002074822
U2 - 10.1016/0168-583X(95)00405-X
DO - 10.1016/0168-583X(95)00405-X
M3 - Article
AN - SCOPUS:0002074822
SN - 0168-583X
VL - 97
SP - 453
EP - 456
JO - Nuclear Inst. and Methods in Physics Research, B
JF - Nuclear Inst. and Methods in Physics Research, B
IS - 1-4
ER -