Zero-field magnetism of a two-dimensional antiferromagnet, κ-(BEDT-TTF)<inf>2</inf>Cu[N(CN)<inf>2</inf>]Cl, determined by muon spin rotation and magnetization measurements

Miho Ito, Tomotaka Uehara, Hiromi Taniguchi, Kazuhiko Satoh, Yasuyuki Ishii, Isao Watanabe

Research output: Contribution to journalArticle

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Abstract

The zero-field magnetism of a two-dimensional noncollinear antiferromagnet, κ-(BEDT-TTF)<inf>2</inf>Cu[N(CN)<inf>2</inf>]Cl, has been investigated by magnetization and zero-field muon spin rotation (μSR) measurements. Low-field magnetization measurements enabled us to determine the magnetic transition temperature T<inf>N</inf> as 22.80 ± 0.02 K. Distinct muon spin precession signals appeared below 21.4 K. μSR spectra below 21.4K were well described by two types of precession components and a relaxation one. The temperature dependence of internal field converted by μSR data was in good agreement with that of macroscopic residual magnetism. These results suggest that the tiny interlayer interaction, which has been suggested to be almost 10<sup>6</sup> times less than the intralayer exchange interaction, spontaneously causes the three-dimensional long-range order.

Original languageEnglish
Article number053703
JournalJournal of the Physical Society of Japan
Volume84
Issue number5
DOIs
Publication statusPublished - 2015 May 15

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muon spin rotation
precession
magnetization
muons
interlayers
transition temperature
interactions
temperature dependence
causes

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  • Physics and Astronomy(all)

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Zero-field magnetism of a two-dimensional antiferromagnet, κ-(BEDT-TTF)<inf>2</inf>Cu[N(CN)<inf>2</inf>]Cl, determined by muon spin rotation and magnetization measurements. / Ito, Miho; Uehara, Tomotaka; Taniguchi, Hiromi; Satoh, Kazuhiko; Ishii, Yasuyuki; Watanabe, Isao.

In: Journal of the Physical Society of Japan, Vol. 84, No. 5, 053703, 15.05.2015.

Research output: Contribution to journalArticle

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AU - Satoh, Kazuhiko

AU - Ishii, Yasuyuki

AU - Watanabe, Isao

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AB - The zero-field magnetism of a two-dimensional noncollinear antiferromagnet, κ-(BEDT-TTF)2Cu[N(CN)2]Cl, has been investigated by magnetization and zero-field muon spin rotation (μSR) measurements. Low-field magnetization measurements enabled us to determine the magnetic transition temperature TN as 22.80 ± 0.02 K. Distinct muon spin precession signals appeared below 21.4 K. μSR spectra below 21.4K were well described by two types of precession components and a relaxation one. The temperature dependence of internal field converted by μSR data was in good agreement with that of macroscopic residual magnetism. These results suggest that the tiny interlayer interaction, which has been suggested to be almost 106 times less than the intralayer exchange interaction, spontaneously causes the three-dimensional long-range order.

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