High field ESR study of the S = 1/2 diamond-chain substance Cu 3(CO3)2(OH)2 up to the magnetization plateau region

Hitoshi Ohta, Susumu Okubo, Tomohisa Kamikawa, Takashi Kunimoto, Yuji Inagaki, Hikomitsu Kikuchi, Takashi Saito, Masaki Azuma, Mikio Takano

研究成果: ジャーナルへの寄稿学術誌査読

56 被引用数 (Scopus)

抄録

High field ESR measurements of Cu3(CO3) 2(OH)2 have been performed in the frequency region from 50 to 900 GHz and in the temperature region from 1.8 to 265 K using the pulsed magnetic field up to 36 T. The large g-shifts below 23 K and the characteristic temperature dependence of the linewidth are discussed in connection with the two maxima of magnetic susceptibility observed at 5 and 23 K. Our ESR results together with the magnetization and theoretical results suggest that the ground state of the system is in the spin fluid (SF) phase at low field and low temperature. From the frequency-field dependence measurements at 1.8 K, the direct transition, which is closely related to the magnetization plateau from 16 to 26 T at 1.5 K, is observed for the first time. The observed frequency-field diagram suggests that the exchange interaction in the dimer is estimated to be about 50 K (1057 GHz).

本文言語英語
ページ(範囲)2464-2467
ページ数4
ジャーナルjournal of the physical society of japan
72
10
DOI
出版ステータス出版済み - 10月 2003
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 物理学および天文学一般

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