Kipgen, Lalminthang and Bernien, Matthias and Ossinger, Sascha and Nickel, Fabian and Britton, Andrew J. and Arruda, Lucas M. and Naggert, Holger and Luo, Chen and Lotze, Christian and Ryll, Hanjo and Radu, Florin and Schierle, Enrico and Weschke, Eugen and Tuczek, Felix and Kuch, Wolfgang (2018) Evolution of cooperativity in the spin transition of an iron(II) complex on a graphite surface. NATURE COMMUNICATIONS, 9: 2984. ISSN 2041-1723,
Full text not available from this repository. (Request a copy)Abstract
Cooperative effects determine the spin-state bistability of spin-crossover molecules (SCMs). Herein, the ultimate scale limit at which cooperative spin switching becomes effective is investigated in a complex [Fe(H2B(pz)(2))(2)(bipy)] deposited on a highly oriented pyrolytic graphite surface, using x-ray absorption spectroscopy. This system exhibits a complete thermal- and light-induced spin transition at thicknesses ranging from submonolayers to multilayers. On increasing the coverage from 0.35(4) to 10(1) monolayers, the width of the temperature-induced spin transition curve narrows significantly, evidencing the buildup of cooperative effects. While the molecules at the submonolayers exhibit an apparent anticooperative behavior, the multilayers starting from a double-layer exhibit a distinctly cooperative spin switching, with a free-molecule-like behavior indicated at around a monolayer. These observations will serve as useful guidelines in designing SCM-based devices.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | THIN-FILMS; MAGNETIC BISTABILITY; CROSSOVER COMPLEX; SINGLE MOLECULES; DIRECT-CONTACT; SOLID-STATE; TEMPERATURE; VACUUM; HYSTERESIS; DEPOSITION; |
| Subjects: | 500 Science > 530 Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 06 Mar 2020 12:13 |
| Last Modified: | 06 Mar 2020 12:13 |
| URI: | https://pred.uni-regensburg.de/id/eprint/14200 |
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