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磁致Fe78Si9B13非晶合金納米晶化磁矩的理論計(jì)算
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國(guó)家自然科學(xué)基金(50771025)；高等學(xué)校博士學(xué)科點(diǎn)專項(xiàng)科研基金(20020145009)


Theoretical Calculation of Magnetic Moment of Fe78Si9B13 Amorphous Alloy Nanocrystallized by Low Frequency Pulse Magnetic Field
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    摘要:

    用低頻脈沖磁場(chǎng)處理非晶Fe78Si9B13合金，在低溫下發(fā)生了納米晶化，利用M?ssbauer譜和LDJ9600震動(dòng)樣品磁強(qiáng)計(jì)進(jìn)行了微結(jié)構(gòu)和磁性分析。借助于固體與分子經(jīng)驗(yàn)電子理論中的BLD方法，計(jì)算了非晶Fe78Si9B13合金磁致低溫納米晶化前后的價(jià)電子結(jié)構(gòu)，并算出了磁矩，其理論計(jì)算值與實(shí)驗(yàn)測(cè)定值的誤差小于7%，滿足一級(jí)近似要求，說(shuō)明從價(jià)電子層次上計(jì)算非晶合金的磁矩是可以實(shí)現(xiàn)的。

    Abstract:

    The amorphous Fe78Si9B13 alloy was treated by low frequency pulse magnetic field (LFPMF) and nanocrystallized at a low temperature. The microstructures and the magnetic properties of the untreated and treated alloys were analyzed by M?ssbauer spectra and LDJ9600 vibrating sample magnetometer (VSM). The valence electron structures and the magnetic moment of the unnanocrystallized and nanocrystallized amorphous alloys were calculated using the method of Bond Length Difference (BLD) of the Empirical Electron Theory (EET) of solids and molecules. The error of the computed value in theory and experimental value of the magnetic moment is less than 7%, which satisfies the demand of first approximation, indicating that it can be realized that magnetic moment of amorphous alloy is calculated on the valence electron level.

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周迎春,張 群,晁月盛.磁致Fe78Si9B13非晶合金納米晶化磁矩的理論計(jì)算[J].稀有金屬材料與工程,2009,38(10):1791~1796.[Zhou Yingchun, Zhang Qun, Chao Yuesheng. Theoretical Calculation of Magnetic Moment of Fe78Si9B13 Amorphous Alloy Nanocrystallized by Low Frequency Pulse Magnetic Field[J]. Rare Metal Materials and Engineering,2009,38(10):1791~1796.]
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  • 收稿日期:2008-10-15
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