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Related Experiment Video

Updated: Dec 6, 2025

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

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Published on: June 7, 2018

Surface effects on temperature-driven spin crossover in Fe(phen)₂(NCS)₂.

¹Guizhou Provincial Key Laboratory of Computational Nano-Material Science, Guizhou Education University, Guiyang 550018, China.

The Journal of Chemical Physics

|October 9, 2020

Summary

Substrate choice significantly impacts spin crossover (SCO) in iron complexes. Temperature-driven SCO is maintained on 2D materials like MoS2 but suppressed on metal surfaces, enabling tunable spin states for spintronics.

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Area of Science:

Materials Science
Surface Science
Quantum Chemistry

Background:

Spin crossover (SCO) phenomena are crucial for molecular spintronics.
Understanding surface effects on SCO behavior is essential but remains limited.

Purpose of the Study:

Investigate the influence of various substrates on the thermal SCO properties of Fe(phen)2(NCS)2.
Correlate substrate-induced electronic and vibrational changes with SCO behavior.

Main Methods:

First-principles calculations were employed to model SCO in Fe(phen)2(NCS)2 on different surfaces.
Analysis focused on electronic structure modifications and molecular vibrations upon adsorption.

Main Results:

Temperature-driven SCO is preserved on hexagonal boron nitride and MoS2.
Low-spin states are locked on metallic surfaces (Cu, Ag, Au), while graphene favors a high-spin state.
Spin transition temperature (Tc) is highly dependent on the surface environment, with sulfur vacancies in MoS2 significantly increasing Tc.

Conclusions:

Substrate choice critically dictates SCO behavior in Fe(phen)2(NCS)2.
Tailoring surface interactions offers a pathway to control spin states for nanoscale spintronic applications.