Magnetic viscosity in strontium ferrite fine particles
Magnetic viscosity in strontium ferrite fine particles
复制标题
锶铁氧体微粒的磁粘度
DOI：
10.1109/20.280841
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发表时间：
1993
影响因子：
1.6
通讯作者：
T. Takeishi
中科院分区：
文献类型：
--
作者：
H. Nishio;H. Taguchi;F. Hirata;T. Takeishi
测量了平均直径（D）和矫顽力（H/sub cJ/）不同的M型六角锶铁氧体（SrM）微粒的磁粘滞系数（S/sub v/）和旋转磁滞损耗（W/sub r/）。研究了S/sub v/、H/sub cJ/、活化体积（v）与W/sub r/之间的关系及球磨效应。这个实验表明，S/sub v/是恒定的，与磁场无关。Ln S/sub v/与In H/sub cJ/成正比，在球磨效果较差的SrM细颗粒中，可以得到约为v/sup-2/的H/sub cJ/。发现SrM细颗粒（D=0.3 μ m）的Sv增加而v减小，其Wr曲线随着研磨而宽度增加，即使它们的H/sub cJ/显著减小。这可以解释为由研磨引起的各向异性场（H/sub A/）的高磁场分量的增加。>
The magnetic viscosity coefficient (S/sub v/) and the rotational hysteresis loss (W/sub r/) are measured for M-type hexagonal strontium ferrite (SrM) fine particles whose average diameter (D) and coercive force (H/sub cJ/) differ. The relationship between S/sub v/, H/sub cJ/, the activation volume (v) and W/sub r/ is studied, together with milling effects. This experiment shows that S/sub v/ is constant and independent of the magnetic field. Ln S/sub v/ is in proportion to In H/sub cJ/, and H/sub cJ/ approximately v/sup -2/ could be obtained in SrM fine particles that had less milling effects. It is found that Sv increases and v decreases with SrM fine particles (D=0.3 mu m) whose Wr curve increases in width with milling, even through their H/sub cJ/ significantly decreases. This can be explained as an increase in high magnetic field components of anisotropy field (H/sub A/) caused by milling. >