Microscopic model for the magnetization plateaus in NH4CuCl3 - art. no. 18403

[摘要] A simple model consisting of three distinct dimer sublattices is proposed to describe the magnetism of NH4CuCl3. It explains the occurrence of magnetization plateaus only at 1/4 and 3/4 of the saturation magnetization. The field dependence of the excitation modes observed by electron-spin-resonance measurements is also explained by the model. The model predicts that the magnetization plateaus should disappear under high pressure.

[发布日期] 2003-11-01

[关键词] BOSE-EINSTEIN CONDENSATION;HIGH-FIELD MAGNETIZATION;TLCUCL3;GAP;SRCU2(BO3)(2);KCUCL3;CHAIN;ESR