FLUID DISPERSION OF SOFT MAGNETISM NANOWIRE

To provide a fluid dispersion of soft magnetism nanowire, by which a soft magnetism nanowire with sufficiently high saturation magnetization and relative magnetic permeability and sufficiently low coercive force can be obtained; in addition, in which oxidative degradation can be suppressed and storage stability can be improved.SOLUTION: A fluid dispersion contains soft magnetism nanowire containing iron and boron and an organic solvent with an SP value of 20 to 45 (MPa)1/2, where the soft magnetism nanowire has an average length of 5 μm or more and an iron/boron molar ratio of less than 5 as measured by the SEM-EDS method.SELECTED DRAWING: Figure 1 【課題】飽和磁化と比透磁率が十分に高く、かつ保磁力が十分に低い軟磁性ナノワイヤーを得ることができ、加えて、酸化劣化が抑制され保存安定性に優れた軟磁性ナノワイヤーの分散液を提供する。【解決手段】鉄とホウ素を含有する軟磁性ナノワイヤーと、ＳＰ値が２０～４５（ＭＰａ）１／２の有機溶媒を含み、前記軟磁性ナノワイヤーが、平均長が５μｍ以上であり、かつＳＥＭ－ＥＤＳ法により測定した鉄／ホウ素のモル比が５未満である分散液。【選択図】図１