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Magnetochemistry 2017, 3(1), 10; doi:10.3390/magnetochemistry3010010

Antiferromagnetic Insulating Ground State of Molecular π-d System Λ-(BETS)2FeCl4 (BETS = Bis(ethylenedithio)tetraselenafulvalene): A Theoretical and Experimental Review

Condensed Molecular Materials Laboratory, RIKEN, Hirosawa 2‐1, Wako, Saitama 351‐0198, Japan
Author to whom correspondence should be addressed.
Academic Editor: Manuel Almeida
Received: 23 January 2017 / Accepted: 22 February 2017 / Published: 24 February 2017
(This article belongs to the Special Issue Magnetism of Molecular Conductors)
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The πd molecular conductor λ‐(BETS)2FeCl4, where BETS is bis(ethylenedithio) tetraselenafulvalene, has attracted considerable interest for the discovery of its field induced superconducting state. A mystery of this system is its antiferromagnetic insulating ground state. The point still under strong debate is whether the d spins in Fe3+ are ordered or not. Here, we review experimental and theoretical studies on the antiferromagnetic insulating phase in λ‐(BETS)2FeCl4 and mention our perspective based on our ESR measurements for λ‐(BETS)2FexGa1−xCl4. Our ESR results indicate that the π‐d interaction in the system is very strong and there is no sign of paramagnetic Fe spins in the antiferromagnetic ground state. View Full-Text
Keywords: π‐d interaction; λ‐(BETS)2FeCl4; electron spin resonance; antiferromagnetic insulating  state; metal‐insulator transition π‐d interaction; λ‐(BETS)2FeCl4; electron spin resonance; antiferromagnetic insulating  state; metal‐insulator transition

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Oshima, Y.; Cui, H.; Kato, R. Antiferromagnetic Insulating Ground State of Molecular π-d System Λ-(BETS)2FeCl4 (BETS = Bis(ethylenedithio)tetraselenafulvalene): A Theoretical and Experimental Review. Magnetochemistry 2017, 3, 10.

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