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    • 1. 发明授权
    • Laminated magnetorestrictive element of an exchange coupling film, an antiferromagnetic film and a ferromagnetic film and a magnetic disk drive using same
    • 交换耦合膜的叠层磁致伸缩元件,反铁磁膜和铁磁膜以及使用它的磁盘驱动器
    • US06313973B1
    • 2001-11-06
    • US09343270
    • 1999-06-30
    • Hiromi FukeKazuhiro SaitoKatsuhiko KouiHideaki FukuzawaAkiko SaitoHitoshi Iwasaki
    • Hiromi FukeKazuhiro SaitoKatsuhiko KouiHideaki FukuzawaAkiko SaitoHitoshi Iwasaki
    • G11B530
    • B82Y25/00B82Y10/00G11B5/012G11B5/3903G11B5/3967G11B2005/3996H01F10/3263H01F10/3268H01F10/3272
    • A magnetoresistive element comprises an exchange coupling film having a under layer, an antiferromagnetic film and a ferromagnetic film, which are laminated in that order, the under layer including a metal having a face centered cubic crystal structure or hexagonal closest packing crystal structure which have a longer nearest neighbor atomic distance than that of the antiferromagnetic film. With this construction, it is possible to improve the exchange coupling field and to satisfy a stable output over a long period of time. A magnetoresistive element having a dual spin valve structure has a magnetization adjusting layer, which is antiferromagnetically connected to a pinned layer via an anti-parallel connection layer, to adjust the value of the product of the saturation magnetization of each of the magnetization adjusting layer and the pinned layer by the thickness thereof. Moreover, a magnetoresistance head use a giant magnetoresistance effect, and has at least one pair of pinned layer and free layer arranged via a non-magnetic spacer layer. The pinned layer has a pair of ferromagnetic layers which have different compositions and different coercive forces and which are antiferromagnetically connected to each other via a connection layer, so that the effective exchange coupling field of the pinned layer is 200 Oe or more.
    • 磁阻元件包括具有下层,反铁磁膜和铁磁膜的交换耦合膜,其按顺序层压,下层包括具有面心立方晶体结构的金属或具有六面体最密堆积晶体结构的金属,其具有 比反铁磁膜的最近邻原子距离更长。 利用这种结构,可以改善交换耦合场并且能够长时间地满足稳定的输出。 具有双自旋阀结构的磁阻元件具有磁化调节层,其通过反并联连接层反铁磁连接到被钉扎层,以调节每个磁化调节层的饱和磁化强度和 被钉扎层的厚度。 此外,磁阻头使用巨磁电阻效应,并且具有通过非磁性间隔层布置的至少一对被钉扎层和自由层。 钉扎层具有一对铁磁层,其具有不同的组成和不同的矫顽力,并且经由连接层彼此反铁磁连接,使得钉扎层的有效交换耦合场为200Oe以上。