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Open AccessArticle

Interfacial Spin Manipulation of Nickel-Quinonoid Complex Adsorbed on Co(001) Substrate

Department of Physics, National Institute of Technology Karnataka, Srinivasnagar, Surathkal, Mangalore 575025, India
Department of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden
Author to whom correspondence should be addressed.
Magnetochemistry 2019, 5(1), 2;
Received: 29 November 2018 / Revised: 20 December 2018 / Accepted: 21 December 2018 / Published: 24 December 2018
(This article belongs to the Special Issue Spin-Crossover Beyond the Immediate Tribute)
We studied the structural, electronic, and magnetic properties of a recently synthesized Ni(II)-quinonoid complex upon adsorption on a magnetic Co(001) substrate. Our density functional theory + U (DFT+U) calculations predict that the molecule undergoes a spin-state switching from low-spin S = 0 in the gas phase to high-spin S 1 when adsorbed on the Co(001) surface. A strong covalent interaction of the quinonoid rings and surface atoms leads to an increase of the Ni–O(N) bond lengths in the chemisorbed molecule that support the spin-state switching. Our DFT+U calculations show that the molecule is ferromagnetically coupled to the substrate. The Co surface–Ni center exchange mechanism was carefully investigated. We identified an indirect exchange interaction via the quinonoid ligands that stabilizes the molecule’s spin moment in ferromagnetic alignment with the Co surface magnetization. View Full-Text
Keywords: spin-state switching; interfacial spin-manipulation; DFT+U theory spin-state switching; interfacial spin-manipulation; DFT+U theory
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MDPI and ACS Style

Reddy, I.R.; Oppeneer, P.M.; Tarafder, K. Interfacial Spin Manipulation of Nickel-Quinonoid Complex Adsorbed on Co(001) Substrate. Magnetochemistry 2019, 5, 2.

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