Field induced metamagnetic transitions in quasi-one-dimensional Ising spin chain CoV2O6

[摘要] We have investigated the temperature and magnetic field dependence of magnetization (M), specific heat (C-p), and relative sample length change (Delta L/L-0) for understanding the field-induced metamagnetic transitions in quasi-one-dimensional monoclinic (alpha phase) and triclinic (gamma phase) CoV2O6 spin chains. With the application of external magnetic field, a sharp peak emerges in C-p(T) below T-N = 15 K in alpha phase and a hump-like feature appears above T-N = 6.5 K in gamma phase due to the field-induced ferrimagnetic and ferromagnetic transitions, respectively. Strong field dependence of linear thermal expansion and large positive magnetostriction have been observed in alpha phase. Though magnetization data indicate strong spin-orbit coupling for both phases, other measurements show that this effect is very weak for the gamma phase. (C) 2015 Elsevier B.V. All rights reserved.

[发布日期] 2016-02-15

[效力级别]  Proceedings Paper

[关键词] Metamagnetic transition;Ising chain systems;Spin-lattice coupling