Thermopower studies of some cobalt-substituted BaZn-W hexagonal ferrites
Thermopower studies of some cobalt-substituted BaZn-W hexagonal ferrites
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DOI：
10.1002/pssa.2211420218
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发表时间：
1994-04
期刊：
影响因子：
--
通讯作者：
V. Reddy;P. V. Reddy
中科院分区：
文献类型：
--
作者：
V. Reddy;P. V. Reddy
在 300 至 800 K 的温度范围内，对一些钴取代的 BaZn-W 型六方铁氧体进行了热电研究，将其作为成分和温度的函数。根据塞贝克系数的符号，所研究的铁氧体被归类为 n 型半导体。从塞贝克系数的温度变化可以看出，由于 475 K 左右的自旋重新定向而产生了转变。假设 W 型铁氧体中的导电主要是由于尖晶石块的 Fe2+ 和 Fe3+ 离子之间电子的跳跃，提出了一种解释这些铁氧体中电荷传输现象的机制。
Thermopower studies of some cobalt-substituted BaZn-W-type hexagonal ferrites are undertaken as a function of composition and temperature over a temperature range 300 to 800 K. On the basis of the sign of the Seebeck coefficient, the ferrites under study are classified as n-type semiconductors. From the temperature variation of Seebeck coefficient a transition due to the reorientation of spins around 475 K has been noticed. Assuming that the conduction in W-type ferrites is predominantly due to the hopping of electrons between Fe2+ and Fe3+ ions of the spinel block, a mechanism to explain the phenomenon of charge transport in these ferrites is suggested.