TY - JOUR
T1 - High field ESR study of the S = 1/2 diamond-chain substance Cu 3(CO3)2(OH)2 up to the magnetization plateau region
AU - Ohta, Hitoshi
AU - Okubo, Susumu
AU - Kamikawa, Tomohisa
AU - Kunimoto, Takashi
AU - Inagaki, Yuji
AU - Kikuchi, Hikomitsu
AU - Saito, Takashi
AU - Azuma, Masaki
AU - Takano, Mikio
PY - 2003/10/1
Y1 - 2003/10/1
N2 - 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).
AB - 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).
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U2 - 10.1143/JPSJ.72.2464
DO - 10.1143/JPSJ.72.2464
M3 - Article
AN - SCOPUS:0242541712
SN - 0031-9015
VL - 72
SP - 2464
EP - 2467
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 10
ER -