Interactions between goethite particles subjected to heat treatment

Madsen DE; Hansen MF; Koch CB; Morup S

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Interactions between goethite particles subjected to heat treatment

机译：热处理针铁矿颗粒之间的相互作用

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We have studied the effect of heating on the magnetic properties of particles of nanocrystalline goethite by use of Mossbauer spectroscopy. Heating at 150 degrees C for 24 h leads to a change in the quadrupole shift in the low-temperature spectra, indicating a rotation of the sublattice magnetization directions. Fitting of quantiles, derived from the asymmetrically broadened spectra between 80 and 300 K, to the superferromagnetism model indicates that this change is due to a stronger magnetic coupling between the particles.

机译：我们已经通过使用Mossbauer光谱研究了加热对纳米晶体针铁矿颗粒磁性的影响。在150摄氏度下加热24小时会导致低温光谱中的四极位移发生变化，表明亚晶格磁化方向发生了旋转。由80和300 K之间的非对称加宽光谱得出的分位数与超铁磁性模型的拟合表明，这种变化是由于粒子之间的强磁耦合引起的。

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来源
《Journal of Physics. Condensed Matter》 |2008年第13期|共6页
作者
Madsen DE; Hansen MF; Koch CB; Morup S;
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正文语种 eng
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关键词
MOSSBAUER-SPECTRA; ALPHA-FEOOH; NEEL TEMPERATURE; GROWTH;

机译：MOSSBAUER-SPECTRA;Alpha-Feooh;NEEL温度;生长;

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Interactions between goethite particles subjected to heat treatment

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