Iron system magnetic powder having high coercive force, and magnetic recording medium using same
    6.
    发明申请
    Iron system magnetic powder having high coercive force, and magnetic recording medium using same 审中-公开
    具有高矫顽力的铁系磁铁粉末和使用其的磁记录介质

    公开(公告)号:US20070111039A1

    公开(公告)日:2007-05-17

    申请号:US11594790

    申请日:2006-11-09

    Abstract: 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 at. % 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 at. % of one or more selected from Al and a rare earth element (defined as including Y).

    Abstract translation: 提供由颗粒构成的磁性粉末,即使当粒径精细化时,在高密度记录介质中显示出优异的磁性能,特别是高矫顽力。 本发明还提供了使用该粉末的磁记录介质。 该粉末是铁系磁粉,以Fe的原子比计,总计为0.01〜10at。 选自W和Mo中的一种或多种的%,特别是主要由Fe <! - SIPO - > N 2 N 2组成的磁性粉末。 磁性粉末能够表现出238kA / m(3000Oe)以上的高矫顽力。 除了W和Mo之外,磁粉可以以Fe的原子比含有总计高达25at。 选自Al和稀土元素(定义为包括Y)中的一种或多种的%。

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