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首页> 外文期刊>Physica, B. Condensed Matter >Nanocrystallite size effect on sigma(s) and H-c in nanoparticle assemblies
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Nanocrystallite size effect on sigma(s) and H-c in nanoparticle assemblies

机译：纳米微晶尺寸对纳米粒子组件中sigma和H-c的影响

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This article presents how Ni0.35Zn0.65Fe2O4 Mixed ferrite nanocrystallites are obtained at low temperatures (500degreesC) by a new chemical method of synthesis, as well as the effect of the nanocrystallites' size on the magnetic properties. We have shown by means of X-ray diffraction that the resulting ferrite is made up of nanocrystallites and the average size of these nanocrystallites-calculated with the Scherer formula-depends on the annealing temperature. When the temperature is modified from 500degreesC to 900degreesC, the nanocrystallites' average diameter ranges from 20.3 to 37.9 nm. The magnetic properties of the nanocrystallite assembly are discussed for values around the single-domain and the multidomain state that results both experimentally and from theoretical calculations. The nanocrystallites are single-domain up to an average diameter of similar to29 nm, whereas above this value they have an incipient structure of Weiss domains. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 25]
机译：本文介绍了如何通过一种新的化学合成方法在低温（500摄氏度）下获得Ni0.35Zn0.65Fe2O4混合铁氧体纳米微晶，以及纳米微晶尺寸对磁性的影响。我们已经通过X射线衍射证明了所得的铁素体是由纳米微晶组成的，这些纳米微晶的平均尺寸（用谢勒公式计算）取决于退火温度。当温度从500摄氏度更改为900摄氏度时，纳米微晶的平均直径为20.3至37.9 nm。对于实验和理论计算得出的单畴和多畴状态周围的值，讨论了纳米微晶组件的磁性。纳米微晶是单畴的，平均直径接近29 nm，而高于该值时，它们具有Weiss畴的初始结构。 （C）2002 Elsevier Science B.V.保留所有权利。 [参考：25]

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