Transport Behavior in Spinel Oxide MgTi₂O₄

【摘要】 Spinel oxide MgTi₂O₄ is synthesized by the spark plasma sintering method.The temperature dependences of magnetic susceptibility and resistance are measured and investigated in detail.It is shown that the transition of MgTi₂O₄ occurs at the phase transition temperature T_t 258 K.The fits of resistance versus temperature curve demonstrate that MgTi₂O₄ displays metal behavior above Tt,while a dual conducting mechanism,the Mott-insulator-like variable range hopping and normal activated conduction,is suggested to be responsible for the transport behavior of MgTi₂O₄ below T_t.更多还原

【Abstract】 Spinel oxide MgTi₂O₄ is synthesized by the spark plasma sintering method.The temperature dependences of magnetic susceptibility and resistance are measured and investigated in detail.It is shown that the transition of MgTi₂O₄ occurs at the phase transition temperature T_t 258 K.The fits of resistance versus temperature curve demonstrate that MgTi₂O₄ displays metal behavior above Tt,while a dual conducting mechanism,the Mott-insulator-like variable range hopping and normal activated conduction,is suggested to be responsible for the transport behavior of MgTi₂O₄ below T_t.更多还原