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    • 3. 发明申请
    • Magnetic Recording and Reproducing Apparatus with Thin-Film Magnetic Head Having Microwave Magnetic Exciting Function
    • 具有微波磁激励功能的薄膜磁头的磁记录和再现装置
    • US20090290267A1
    • 2009-11-26
    • US12470150
    • 2009-05-21
    • Hiroshi IkedaSaori KajiharaKiyoshi NoguchiIsamu Sato
    • Hiroshi IkedaSaori KajiharaKiyoshi NoguchiIsamu Sato
    • G11B5/33
    • B82Y10/00B82Y25/00G11B5/3967G11B25/043G11B33/08G11B2005/001G11B2005/0024G11B2005/3996
    • A magnetic recording and reproducing apparatus with a thin-film magnetic head having microwave magnetic exciting function, includes a metal housing, a magnetic recording medium, arranged in the metal housing, having a magnetic recording layer, and a thin-film magnetic head, arranged in the metal housing, having a write magnetic field production unit and a resonance magnetic field production unit. The write magnetic field production unit produces, in response to a write signal, a write magnetic field to be applied into the magnetic recording layer, and the resonance magnetic field production unit produces, in response to a microwave excitation signal, a resonance magnetic field with a frequency equal to or in a range near a ferromagnetic resonance frequency FR of a the magnetic recording layer. The apparatus further includes a write signal generation unit, arranged in the metal housing, for generating the write signal, a microwave signal generation unit, arranged in the metal housing, for generating the microwave excitation signal, a transmission unit, arranged in the metal housing, for feeding the microwave excitation signal generated by the microwave signal generation unit to the resonance magnetic field production unit in the thin-film magnetic head and for feeding the write signal generated by the write signal generation unit to the write magnetic field production unit in the thin-film magnetic head, and a plurality of metal ribs, arranged in the metal housing, for forming a plurality of cavities, each of the plurality of cavities having a rectangular horizontal section shape and having dimensions to produce no resonance at a frequency of the microwave excitation signal.
    • 具有微波磁激励功能的薄膜磁头的磁记录和重放装置包括布置在具有磁记录层的金属外壳中的金属外壳,磁记录介质和薄膜磁头, 在金属外壳中,具有写入磁场产生单元和共振磁场产生单元。 写入磁场产生单元响应于写入信号产生要施加到磁记录层中的写入磁场,并且谐振磁场产生单元响应于微波激励信号产生具有 等于或者在磁记录层的铁磁共振频率FR附近的范围内的频率。 该装置还包括写入信号生成单元,布置在金属外壳中用于产生写入信号,布置在金属外壳中的用于产生微波激励信号的微波信号产生单元,布置在金属外壳中的传输单元 ,用于将由微波信号生成单元生成的微波激励信号馈送到薄膜磁头中的共振磁场产生单元,并将由写入信号生成单元生成的写信号馈送到写入磁场产生单元 薄膜磁头和多个金属肋,布置在金属壳体中,用于形成多个空腔,多个空腔中的每一个具有矩形水平截面形状,并且具有尺寸以便在频率处不产生共振 微波激励信号。