Comparison of the spin exchange interactions in PbCu2(PO4)2 and SrCu2(PO4)2 on the basis of spin dimer analysis |
| |
| Institution: | Department of Chemistry and Research Institute of Basic Science, Kyung Hee University, Seoul 130-701, Republic of Korea |
| |
| Abstract: | The spin exchange interactions of PbCu2(PO4)2 were examined by performing the spin dimer analysis based on the extended Hückel tight-binding method, and were compared with those of SrCu2(PO4)2. The two strongest Cu–O⋯O–Cu super–superexchange interactions, J1 (with Cu⋯Cu = 5.868 Å) and J2 (with Cu⋯Cu = 5.184 Å), are strong and lead to a linear-four-spin-cluster model for both PbCu2(PO4)2 and SrCu2(PO4)2. Adjacent linear-four-spin-clusters interact substantially in SrCu2(PO4)2, but weakly in PbCu2(PO4)2. The difference in the magnetization behaviors of the two compounds was examined by calculating the magnetic excitation energies of the linear-four-spin-cluster model. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
