论文标题
旋转冷冻过渡和结构，磁相图的演变dy $ _ {2-x} $ la $ _x $ zr $ _2 $ _2 $ o $ $ _7 $; $ x $ = 0-2.0
Evolution of spin freezing transition and structural, magnetic phase diagram of Dy$_{2-x}$La$_x$Zr$_2$O$_7$; $x$ = 0-2.0
论文作者
论文摘要
dy $ _ {2} $ zr $ _ {2} $ o $ _ {7} $一个无序的pyrochlore系统，在磁场的应用下展示了旋转冰冻。我们的研究表明，在dy $ _ {2-x} $ la $ _ {x} $ zr $ _ {2} $ _ {2} $ o $ $ _ {7} $的稳定中，用非磁性la以及双性化混合物代替了中间组成。我们观察到，较高的LA组成（1.5 $ \ leq $ x $ \ leq $ 1.9），显示自旋冻结（T $ \ sim $ 17 k），类似于现场诱导的旋转冰冰冰冻（0 $ \ leq $ x $ x $ \ leq $ 0.5），以及众所周知的自旋冰系统系统系统dy $ _ {2} $ ti $ _ {2} $ o $ _ {7} $和ho $ _ {2} $ ti $ _ {2} $ o $ $ $ _ {7} $。较高LA组成的低温磁状态（1.5 $ \ LEQ $ x $ \ leq $ 1.9）尖锐于6 K以下的旋转玻璃状态。Cole-Cole的情节和Casimir-du Pr $ \急性{E} $ fit显示出这些化合物中旋转放松时间的狭窄分布。
Dy$_{2}$Zr$_{2}$O$_{7}$ a disordered pyrochlore system, exhibits the spin ice freezing under the application of magnetic field. Our studies suggest the stabilization of pyrochlore phase in Dy$_{2-x}$La$_{x}$Zr$_{2}$O$_{7}$ with the substitution of nonmagnetic La, along with the biphasic mixture for the intermediate compositions. We observed that the higher La compositions (1.5 $\leq$ x $\leq$ 1.9), show spin freezing (T $\sim$ 17 K) similar to the field induced spin ice freezing for low La compositions (0 $\leq$ x $\leq$ 0.5), and the well known spin ice systems Dy$_{2}$Ti$_{2}$O$_{7}$ and Ho$_{2}$Ti$_{2}$O$_{7}$. The low temperature magnetic state for higher La compositions (1.5 $\leq$ x $\leq$ 1.9) culminates into spin glass state below 6 K. The Cole-Cole plot and Casimir-du Pr$\acute{e}$ fit shows narrow distribution of spin relaxation time in these compounds.
