Observation of 1/3 magnetization-plateau-like anomaly in S = 3/2 perfect kagomé lattice antiferromagnet KCr3(OH)6(SO 4)2 (Cr-jarosite)

Koji Okuta; Shigeo Hara; Hirohiko Sato; Yasuo Narumi; Koichi Kindo

doi:10.1143/JPSJ.80.063703

Observation of 1/3 magnetization-plateau-like anomaly in S = 3/2 perfect kagomé lattice antiferromagnet KCr₃(OH)₆(SO ₄)₂ (Cr-jarosite)

Koji Okuta, Shigeo Hara, Hirohiko Sato, Yasuo Narumi, Koichi Kindo

Materials Property Division

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

23 Citations (Scopus)

Abstract

Single crystals of the S - 3/2 kagomé lattice antiferromagnet KCr₃(OH)₆(SO₄)₂ (Cr-jarosite) have been synthesized. Magnetic susceptibility measurement reveals an antiferromagnetic transition at T_N - 4.5 K. A weak ferromagnetism with a spontaneous magnetization along the c-axis appears below T_N. High-field magnetization measurement reveals an anomaly at about 1/3 of the saturation magnetization under in-plane magnetic fields, however, the out-of-plane magnetization curve is almost linear. In contrast to ordinary field-induced transitions, the anomaly is less pronounced at lower temperatures. This observation is consistent with the prediction made using the order-by-disorder model on the 1/3 magnetization plateau.

Original language	English
Article number	063703
Journal	journal of the physical society of japan
Volume	80
Issue number	6
DOIs	https://doi.org/10.1143/JPSJ.80.063703
Publication status	Published - 2011 Jun

Keywords

1/3 magnetization plateau
Cr-jarosite
Geometric frustration
High-field magnetization
Kagomé lattice antiferromagnet
Order by disorder
Single crystal

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1143/JPSJ.80.063703

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title = "Observation of 1/3 magnetization-plateau-like anomaly in S = 3/2 perfect kagom{\'e} lattice antiferromagnet KCr3(OH)6(SO 4)2 (Cr-jarosite)",

abstract = "Single crystals of the S - 3/2 kagom{\'e} lattice antiferromagnet KCr3(OH)6(SO4)2 (Cr-jarosite) have been synthesized. Magnetic susceptibility measurement reveals an antiferromagnetic transition at TN - 4.5 K. A weak ferromagnetism with a spontaneous magnetization along the c-axis appears below TN. High-field magnetization measurement reveals an anomaly at about 1/3 of the saturation magnetization under in-plane magnetic fields, however, the out-of-plane magnetization curve is almost linear. In contrast to ordinary field-induced transitions, the anomaly is less pronounced at lower temperatures. This observation is consistent with the prediction made using the order-by-disorder model on the 1/3 magnetization plateau.",

keywords = "1/3 magnetization plateau, Cr-jarosite, Geometric frustration, High-field magnetization, Kagom{\'e} lattice antiferromagnet, Order by disorder, Single crystal",

author = "Koji Okuta and Shigeo Hara and Hirohiko Sato and Yasuo Narumi and Koichi Kindo",

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AU - Okuta, Koji

AU - Hara, Shigeo

AU - Sato, Hirohiko

AU - Narumi, Yasuo

AU - Kindo, Koichi

PY - 2011/6

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N2 - Single crystals of the S - 3/2 kagomé lattice antiferromagnet KCr3(OH)6(SO4)2 (Cr-jarosite) have been synthesized. Magnetic susceptibility measurement reveals an antiferromagnetic transition at TN - 4.5 K. A weak ferromagnetism with a spontaneous magnetization along the c-axis appears below TN. High-field magnetization measurement reveals an anomaly at about 1/3 of the saturation magnetization under in-plane magnetic fields, however, the out-of-plane magnetization curve is almost linear. In contrast to ordinary field-induced transitions, the anomaly is less pronounced at lower temperatures. This observation is consistent with the prediction made using the order-by-disorder model on the 1/3 magnetization plateau.

AB - Single crystals of the S - 3/2 kagomé lattice antiferromagnet KCr3(OH)6(SO4)2 (Cr-jarosite) have been synthesized. Magnetic susceptibility measurement reveals an antiferromagnetic transition at TN - 4.5 K. A weak ferromagnetism with a spontaneous magnetization along the c-axis appears below TN. High-field magnetization measurement reveals an anomaly at about 1/3 of the saturation magnetization under in-plane magnetic fields, however, the out-of-plane magnetization curve is almost linear. In contrast to ordinary field-induced transitions, the anomaly is less pronounced at lower temperatures. This observation is consistent with the prediction made using the order-by-disorder model on the 1/3 magnetization plateau.

KW - 1/3 magnetization plateau

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KW - Kagomé lattice antiferromagnet

KW - Order by disorder

KW - Single crystal

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