MILLIMETER WAVE BAND NONRECIPROCAL DEVICE
    1.
    发明申请
    MILLIMETER WAVE BAND NONRECIPROCAL DEVICE 有权
    MILLIMETER波段非线性器件

    公开(公告)号:US20090261919A1

    公开(公告)日:2009-10-22

    申请号:US12253651

    申请日:2008-10-17

    CPC分类号: H01P1/32 H01F1/113

    摘要: [Problem] When a nonreciprocal device operating at 100 GHz to 300 GHz is to be realized by using a conventional magnetic material of garnet-type ferrite or spinel-type ferrite, a huge permanent magnet is required and, therefore, it is very difficult to achieve a millimeter-wave band nonreciprocal device for practical use.[Solving means] To solve this problem, there is provided a millimeter-wave band nonreciprocal device composed of a magnetic material represented by a formula ε-MxFe2-xO3 (0

    摘要翻译: [问题]当通过使用石榴石型铁氧体或尖晶石型铁氧体的常规磁性材料来实现在100GHz至300GHz工作的不可逆设备时,需要巨大的永磁体,因此很难 实现毫米波段非互易设备的实际应用。 [解决方案]为了解决这个问题,提供了一种由式ε-MxFe2-xO3(0

    Magnetic material
    8.
    发明申请
    Magnetic material 有权
    磁性材料

    公开(公告)号:US20080057352A1

    公开(公告)日:2008-03-06

    申请号:US11892911

    申请日:2007-08-28

    IPC分类号: G11B5/706 B32B5/16 C04B35/26

    摘要: A magnetic material is provided that has an iron oxide phase whose principal phase is a crystal of a structure which has the same space group as ε-Fe2O3 crystal and in which Al is substituted for a portion of the Fe sites of the ε-Fe2O3 crystal. The molar ratio of Al to Fe in the iron oxide phase, when expressed as Al:Fe=x:(2−x), satisfies 0≦x≦1. The value of x is preferably in the range of 0.3 to 0.7. The average particle diameter of the powder determined from a TEM image is preferably 5 to 200 nm, more preferably 10 to 100 nm. The magnetic material has very high practical value because it enables the extremely high coercive force Hc of the ε-Fe2O3 crystal to be regulated to a level enabling utilization in magnetic recording medium and various other applications. The magnetic powder can be produced by a method combining the reverse micelle method and the sol-gel method.

    摘要翻译: 提供一种磁性材料,其具有氧化铁相,其主相是具有与ε-Fe 2 O 3结晶相同的空间基团的结构的晶体,并且在 该Al取代了ε-Fe 2 O 3结晶的一部分Fe位点。 当以Al:Fe = x:(2-x)表示时,氧化铁相中的Al与Fe的摩尔比满足0