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Role of the d-d interaction in the antiferromagnetic phase of lambda-(BEDT-STF)(2)FeCl4

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Title: Role of the d-d interaction in the antiferromagnetic phase of lambda-(BEDT-STF)(2)FeCl4
Authors: Minamidate, Takaaki Browse this author
Shindo, Hironori Browse this author
Ihara, Yoshihiko Browse this author
Kawamoto, Atsushi Browse this author →KAKEN DB
Matsunaga, Noriaki Browse this author →KAKEN DB
Nomura, Kazushige Browse this author
Keywords: Antiferromagnetism
Magnetic phase transitions
Magnetic susceptibility
Spin relaxation
2-dimensional systems
DC susceptibility measurements
Nuclear magnetic resonance
Issue Date: 5-Mar-2018
Publisher: American Physical Society (APS)
Journal Title: Physical Review B
Volume: 97
Issue: 10
Start Page: 104404
Publisher DOI: 10.1103/PhysRevB.97.104404
Abstract: Magnetic susceptibility and proton nuclear magnetic resonance (H-1-NMR) measurements were performed for the quasi-two-dimensional pi-d interacting system lambda-(BEDT-STF)(2)FeCl4 at ambient pressure. Magnetic susceptibility arising from the 3d spins of the FeCl4 anion show an anisotropy at low temperature and its temperature dependence for the external field parallel to the c axis is described as a broad peak structure at 8 K. A sharp peak in the temperature dependence of T-1(-1) associated with the antiferromagnetic (AF) transition is observed at T-AF = 16 K, together with the drastic splitting of the NMR spectrum below T-AF. The relation between the static susceptibility and the splitting of the NMR shift suggests the existence of the relatively strong d-d AF interaction. These results can be explained by the model considering the AF-coupled d-spin system in the AF long-range-ordered pi-spin system. We find that the AF phases in lambda-type salts can be universally explained by this model.
Rights: (C)2018 American Physical Society
Type: article
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 野村 一成

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