| AVS 61st International Symposium & Exhibition | |
| Magnetic Interfaces and Nanostructures | Tuesday Sessions |
| Session MI+MG-TuM |
| Session: | Advanced Materials Discovery |
| Presenter: | Xin Zhang, University of Nebraska-Lincoln |
| Authors: | X. Zhang, University of Nebraska-Lincoln S. Mu, University of Nebraska-Lincoln J. Chen, Columbia University T. Palamarciuc, Université de Bordeaux, France P. Rosa, Université de Bordeaux, France J.-F. Létard, Université de Bordeaux, France J. Liu, Brookhaven National Laboratory D. Arena, Brookhaven National Laboratory B. Doudin, Université de Strasbourg, France P.A. Dowben, University of Nebraska-Lincoln |
| Correspondent: | Click to Email |
The electronic structures of three different spin crossover molecules have been obtained by temperature dependent X-ray absorption spectroscopy (XAS). We show compelling evidence that the electronic structure changes associated with the spin crossover transition occur at significantly lower temperature than observed for the change in the molecular spin state. The transition temperatures indicated by XAS is about 20~60 K lower than that given by the magnetic moment switching. The changes in electronic structure are in agreement with density function theory (DFT) results that shows that the molecular electronic structures are different for high spin (HS) and low spin (LS) states. The conclusion that the electronic structure changes occur at significantly lower temperature than observed for the change in the molecular spin state associated with the spin crossover transition are also supported by transport measurements and the temperature dependence of the dielectric properties of SCO molecular system: [Fe(PM-AzA)2(NCS)2].