Phase transition from spin glass to long-range magnetic order in semiconductor spinel CuCr(1.5+0.5x)Sb(0.5-0.5x)S4 (x=0.34 and 0.4)статья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Reentrant behavior to a spin glass state is discovered in the solid solution system CuCr(1.5+0.5x)Sb(0.5-0.5x)S4 with x=0.34 and 0.4. The spin-glass transition temperature Tf determined from the kink in the temperature dependence of the initial susceptibility in an alternating magnetic field depends on the measurement frequancy omega. It is shown that the frequancy dependence Tf(omega) is a power-law function 1/omega = (1/omega _0)[Tf-T*)]^znyu with znyu = 7.7 for both compositions. For the composition with x=0.34 a maximum is observed near T* in the temperature dependence of the resistivity. These facts indicate that the transition from the spin glass to long-range magnetic order is a phase transition.