TY - JOUR
T1 - Susceptibility, Magnetization Process and ESR Studies on the Helical Spin System RbCuCl3
AU - Maruyama, Syuji
AU - Tanaka, Hidekazu
AU - Narumi, Yasuo
AU - Kindo, Koichi
AU - Nojiri, Hiroyuki
AU - Motokawa, Mitsuhiro
AU - Nagata, Kazukiyo
PY - 2001/3
Y1 - 2001/3
N2 - The static and dynamic magnetic properties of an S = 1/2 stacked triangular antiferromagnet RbCuCl3 with a helical spin structure due to lattice distortion were investigated by magnetic susceptibility, high-field magnetization process and ESR measurements. The magnetic susceptibilities were analyzed by high-temperature expansion approximation in terms of ferromagnetic intrachain coupling and the antiferromagnetic interchain coupling. The magnetization saturates at Hs ≈ 66.8 T at 1.5 K, the value of which is twice that of CsCuCl3. A small magnetization jump indicative of a phase transition was observed at Hc = 21.2 T ≈ (1/3)Hs for H ⊥ c. ESR modes observed for H ∥ c are well described by the calculation based on the helical spin structure. From the present measurements, the ferromagnetic intrachain and two kinds of antiferromagnetic interchain exchange interactions, and the planar anisotropy energy were determined as J0/kB = 25.7 K, J1/kB = -10.6 K, J′1/kB = -17.4 K, and ΔJ0/kB = -0.45 K, respectively.
AB - The static and dynamic magnetic properties of an S = 1/2 stacked triangular antiferromagnet RbCuCl3 with a helical spin structure due to lattice distortion were investigated by magnetic susceptibility, high-field magnetization process and ESR measurements. The magnetic susceptibilities were analyzed by high-temperature expansion approximation in terms of ferromagnetic intrachain coupling and the antiferromagnetic interchain coupling. The magnetization saturates at Hs ≈ 66.8 T at 1.5 K, the value of which is twice that of CsCuCl3. A small magnetization jump indicative of a phase transition was observed at Hc = 21.2 T ≈ (1/3)Hs for H ⊥ c. ESR modes observed for H ∥ c are well described by the calculation based on the helical spin structure. From the present measurements, the ferromagnetic intrachain and two kinds of antiferromagnetic interchain exchange interactions, and the planar anisotropy energy were determined as J0/kB = 25.7 K, J1/kB = -10.6 K, J′1/kB = -17.4 K, and ΔJ0/kB = -0.45 K, respectively.
KW - Distorted triangular antiferromagnet
KW - ESR
KW - Field-induced phase transition
KW - Helical spin structure
KW - High-field magnetization process
KW - RbCuCl
KW - Susceptibility
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U2 - 10.1143/JPSJ.70.859
DO - 10.1143/JPSJ.70.859
M3 - Article
AN - SCOPUS:0035645780
SN - 0031-9015
VL - 70
SP - 859
EP - 865
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 3
ER -