期刊
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
卷 74, 期 10, 页码 2831-2835出版社
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.74.2831
关键词
delta-chain; quantum spin; frustration; high field magnetization; Dzyaloshinskii-Moriya interaction
High field magnetization processes were measured for the single crystal of an S = 1/2 ferro-antiferromagnetic delta-chain system [Cu(bpy)(H2O)][Cu(bpy)(mal)-(H2O)](ClO4)(2). At low temperatures, the observed magnetization curve shows a rapid increase to half of the saturation moment below about I T and then followed by a gradual increase to fully polarized state below about 7 T. Concerning this characteristic magnetization process, we discuss the round state of the system qualitatively based oil a non-interacting two sublattice model, where a delta-chain is divided into apical free spins and remaining basal spins regarded as quasi one dimensional antiferromagnetic chain. Essential effect of ferromagnetic interaction, which connects an apical spin and basal spins, is pointed out from the comparison with theoretical curve for the non-interacting two sublattice model as well as with the numerically calculated curve. Presence of the Dzyaloshinskii-Moriya interaction is also suggested from the arguments for the saturation behavior and/or saturation field itself based on the spin wave theory.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据