The change of grain size have some relationship with the surface roughness.
晶粒尺寸大小变化与表面粗糙度变化存在对应关系。
The results indicate that the internal magnetic field has varied obviously with the change of grain size and environment temperature mainly due to collective magnetic excitations.
结果表明，由于集体磁激发现象的存在，随颗粒尺寸和环境温度的改变，样品的内磁场发生了明显变化。
With the change of the grain size, the dielectric properties changed.
随着粒径的变化，介电性质也随之变化。
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