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发明公开
CN1975941A 具有较高矫顽力的铁系磁性粉末及使用该粉末的磁记录介质 无效 - 撤回

具有较高矫顽力的铁系磁性粉末及使用该粉末的磁记录介质
摘要：
提供了一种用于高密度记录介质的由颗粒构成的磁性粉末，即使当细化颗粒尺寸时该磁性粉体也表现出优异的磁性能，特别是高的矫顽力。本发明还提供了使用该粉末的磁记录介质。该粉末是按Fe的原子比包含总量为0.01～10原子百分比的选自W和Mo的一种或多种的铁系磁性粉末，特别是主要由F16N2构成的磁性粉末。该磁性粉末能够表现出238kA/m(3000Oe)或更大的矫顽力。除W和Mo以外，该磁性粉末按Fe的原子比可包含总量最高为25原子百分比的选自Al和稀土元素(限定为包含Y)的一种或多种。
摘要（英）：

A magnetic powder is provided composed of particles that, even when the particle size is refined, exhibits excellent magnetic properties, in particular, a high coercive force, for use in a high-density recording medium. The invention also provides a magnetic recording medium using the powder. The powder is an iron system magnetic powder containing, as an atomic ratio of Fe, a total of 0.01 to 10 atom% of one or more selected from W and Mo, particularly a magnetic powder comprised mainly of Fe16N2. The magnetic powder is able to exhibit a high coercive force of 238 kA/m (3000 Oe) or more. In addition to the W and Mo, the magnetic powder may contain, as an atomic ratio of Fe, a total of up to 25 atom% of one or more selected from Al and a rare earth element (defined as including Y).

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