Impurity-induced antiferromagnetic ordering in the spin gap system TlCuCl3

Article

关键词: LONG-RANGE ORDER;    PEIERLS TRANSITION;    DOPED CUGEO3;    STATE;    SR(CU1-XZNX)(2)O-3;    CUPRATE;    PHASES;   

DOI  :  10.1103/PhysRevB.66.020405

来源: SCIE

【 摘 要 】

Magnetization measurements have been performed on the doped spin gap system TlCu1-xMgxCl3 with xless than or equal to0.025. The parent compound TlCuCl3 is a three-dimensional coupled spin dimer system with the excitation gap Delta/k(B)=7.7 K. The impurity-induced antiferromagnetic ordering was clearly observed. The easy axis lies in the (0,1,0) plane. It was found that the transition temperature increases with increasing Mg2+ concentration x, while the spin-flop transition field is almost independent of x. The magnetization curve suggests that the impurity-induced antiferromagnetic ordering coexists with the spin gap for xless than or equal to0.017.

【 授权许可】

Free