1/3 Magnetization anomaly in triangular spin prism

Yugo Oshima; Hiroyuki Nojiri; Keisuke Fukaya; Toshihiro Yamase

doi:10.1143/JPSJ.77.044706

1/3 Magnetization anomaly in triangular spin prism

Yugo Oshima, Hiroyuki Nojiri, Keisuke Fukaya, Toshihiro Yamase

Institute for Materials Research (IMR) (institute affiliation only)

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

A high-field magnetization process for the triangular spin prism Na ₁₇[Mn₆(H₂O)₂(AsW₉O ₃₄)₂-(AsW₆O₂₆)]·38H ₂O, which consists of six Mn²⁺ ions (S = 5/2), has been investigated. The magnetization at low temperature shows a 1/3 plateau around 5.5 T. It is examined by theoretical calculations using exact diagonalization. The experimental results can be reproduced, but only in a restricted parameter range. It implies that the plateau originates from a delicate balance of exchange couplings. We propose that the plateau is stabilized by some external perturbations, such as thermal/quantum fluctuations.

Original language	English
Article number	044706
Journal	journal of the physical society of japan
Volume	77
Issue number	4
DOIs	https://doi.org/10.1143/JPSJ.77.044706
Publication status	Published - 2008 Apr

Keywords

1/3 Magnetization plateau
Magnetic anisotropy
Spin cluster
Thermal/quantum fluctuations
Triangular prism

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1143/JPSJ.77.044706

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title = "1/3 Magnetization anomaly in triangular spin prism",

abstract = "A high-field magnetization process for the triangular spin prism Na 17[Mn6(H2O)2(AsW9O 34)2-(AsW6O26)]·38H 2O, which consists of six Mn2+ ions (S = 5/2), has been investigated. The magnetization at low temperature shows a 1/3 plateau around 5.5 T. It is examined by theoretical calculations using exact diagonalization. The experimental results can be reproduced, but only in a restricted parameter range. It implies that the plateau originates from a delicate balance of exchange couplings. We propose that the plateau is stabilized by some external perturbations, such as thermal/quantum fluctuations.",

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author = "Yugo Oshima and Hiroyuki Nojiri and Keisuke Fukaya and Toshihiro Yamase",

year = "2008",

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doi = "10.1143/JPSJ.77.044706",

language = "English",

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journal = "Journal of the Physical Society of Japan",

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T1 - 1/3 Magnetization anomaly in triangular spin prism

AU - Oshima, Yugo

AU - Nojiri, Hiroyuki

AU - Fukaya, Keisuke

AU - Yamase, Toshihiro

PY - 2008/4

Y1 - 2008/4

N2 - A high-field magnetization process for the triangular spin prism Na 17[Mn6(H2O)2(AsW9O 34)2-(AsW6O26)]·38H 2O, which consists of six Mn2+ ions (S = 5/2), has been investigated. The magnetization at low temperature shows a 1/3 plateau around 5.5 T. It is examined by theoretical calculations using exact diagonalization. The experimental results can be reproduced, but only in a restricted parameter range. It implies that the plateau originates from a delicate balance of exchange couplings. We propose that the plateau is stabilized by some external perturbations, such as thermal/quantum fluctuations.

AB - A high-field magnetization process for the triangular spin prism Na 17[Mn6(H2O)2(AsW9O 34)2-(AsW6O26)]·38H 2O, which consists of six Mn2+ ions (S = 5/2), has been investigated. The magnetization at low temperature shows a 1/3 plateau around 5.5 T. It is examined by theoretical calculations using exact diagonalization. The experimental results can be reproduced, but only in a restricted parameter range. It implies that the plateau originates from a delicate balance of exchange couplings. We propose that the plateau is stabilized by some external perturbations, such as thermal/quantum fluctuations.

KW - 1/3 Magnetization plateau

KW - Magnetic anisotropy

KW - Spin cluster

KW - Thermal/quantum fluctuations

KW - Triangular prism

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1/3 Magnetization anomaly in triangular spin prism

Abstract

Keywords

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