HIGH-FIELD MAGNETIZATION OF QUASI ONE-DIMENSIONAL ISING ANTIFERROMAGNET CSCOCL3

Magnetization of quasi one dimensional Ising antiferromagnet CsCoCl3 is measured at liquid 4He temperatures in pulsed high magnetic fields. In the case of an applied field H parallel to the Ising c-axis, the magnetization M at liq. 4He temperatures shows a metamagnetic transition which is characterized by the sharp double peaks of the field derivative of the magnetization dM/dH at 33.0 T and 43.9 T, respectively. The results are qualitatively explained by the Ising-like linear chain model with small antiferromagnetic interchain exchange interaction. The role of the interchain interaction is discussed within the framework of molecular field approximation. The temperature dependence and the transverse case of the magnetization process are also studied. © 1990, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.