Magnetism of Zn0.98Co0.02O nanopowders

Xu QY; Yang J

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Magnetism of Zn0.98Co0.02O nanopowders

机译：Zn0.98Co0.02O纳米粉的磁性

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We prepared Zn0.98Co0.02O nanopowders by conventional sol-gel method. The powders were sintered at different temperatures. The X-ray diffraction patters showed only wurtzite structure without any impurity phase, better crystalline structure and larger grain size with higher sintering temperature. The magnetic measurements showed that all the powders exhibited paramagnetism with weak antiferromagnetic exchange interaction. The quenched magnetic moment of Co ions was attributed to the weak antiferromagnetic exchange interaction between single Co ions and the antiparallel spin alignment of neighboring aggregated Co ions.

机译：采用常规的溶胶-凝胶法制备了Zn0.98Co0.02O纳米粉。粉末在不同温度下烧结。 X射线衍射图谱仅显示纤锌矿结构，没有任何杂质相，结晶结构更好，烧结温度较高时晶粒较大。磁性测量表明，所有粉末均表现出顺磁性，具有弱的反铁磁交换相互作用。 Co离子的猝灭磁矩归因于单个Co离子之间弱的反铁磁交换相互作用和相邻聚集的Co离子的反平行自旋排列。

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《Physica, B. Condensed Matter》 |2010年第4期|共5页
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Xu QY; Yang J;
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Diluted magnetic semiconductor; ZnO; Magnetism;

机译：稀磁半导体ZnO磁性;

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Magnetism of Zn0.98Co0.02O nanopowders

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