Novel Frustrated Spin Chain System in KCu5V3O13

Hiroya Sakurai, Kazuyoshi Yoshimura, Koji Kosuge, Akihiro Mitsuda, Tsuneaki Goto

研究成果: ジャーナルへの寄稿学術誌査読

3 被引用数 (Scopus)

抄録

A powder sample of KCu5V3O13 was synthesized and is expected to represent a novel frustrated spin chain system based on its characteristic crystal structure. The magnetic susceptibility and the high-field magnetization process were investigated in order to elucidate the ground state of this spin chain system. From the results, the ground state of this compound appears to be an antiferromagnetically ordered state. The transition temperature was determined to be TN = 7.8 K. However, there are some anomalous behaviors evident in both the susceptibility and the magnetization curves: the Curie constant and the Weiss temperature change markedly around 75 K, the gradient of the magnetization curve becomes small after a spin-flop transition, and the number of the ordered spins is only 1/5 of all the copper spins. Assuming that the other spins vanish by forming a spin-singlet state, the energy gap was estimated to be 44.3 K from the magnetization curve. Thus, the classical renormalized ordered state may coexist with the quantum disordered state. Two conceivable models have been proposed for the ground state.

本文言語英語
ページ(範囲)3209-3212
ページ数4
ジャーナルjournal of the physical society of japan
70
11
DOI
出版ステータス出版済み - 11月 1 2001
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 物理学および天文学(全般)

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