Article comprising a magneto-optic material having low magnetic moment
    2.
    发明授权
    Article comprising a magneto-optic material having low magnetic moment 失效
    本文包括具有低磁矩的磁光材料

    公开(公告)号:US5801875A

    公开(公告)日:1998-09-01

    申请号:US653085

    申请日:1996-06-12

    CPC分类号: H01F10/245 G02F1/0036

    摘要: Garnet material according to a particular embodiment of the invention exhibits a substantially rectangular magnetization loop, with .vertline.H.sub.S .vertline.>.vertline.4.pi.M.sub.S .vertline.Oe and .vertline.4.pi.M.sub.s .vertline. 500 Oe) at least at room temperature. Garnet materials according to the invention can advantageously be used in magneto-optic isolators and other magneto-optic devices. For instance, the material enables manufacture of isolators that do not contain a bias magnet. Garnet materials according to the invention generally contain at most relatively small amounts of Gd, Tb and Dy (less than 1.0, 2.1 and 2.5 atoms per formula unit, respectively; with Gd+(Tb/2.1)+(Dy/2.5)

    摘要翻译: 根据本发明的特定实施例的石榴石材料在预定的工作范围内(例如,-40°至+ 50°)表现出基本上矩形的磁化回路,其具有| HS | | | | | | | | | | | | | | | | | 80℃),其中HS是环路的开关磁场,4πMS是饱和磁化强度。 该材料具有改进的闭锁行为。 在本发明的另一个实施方案中,选择石榴石材料的组成使得该材料至少在室温下表现出硬的锁定行为(| Hs> 500Oe)。 根据本发明的石榴石材料可以有利地用于磁光隔离器和其它磁光器件中。 例如,该材料能够制造不含偏置磁体的隔离器。 根据本发明的石榴石材料通常含有至多相对少量的Gd,Tb和Dy(分别为每个式单元小于1.0,2.1和2.5个原子; Gd +(Tb / 2.1)+(Dy / 2.5)<1.0) ,通常含有Eu和/或Ho。 根据现有实践,根据本发明的组合物可以在例如室温下在工作温度范围内具有补偿温度。 根据本发明的示例性石榴石具有标称组成Bi0.75Eu1.5Ho0.75Fe4.1Ga0.9O12。

    Process for fabricating an article comprising a magneto-optic garnet material
    3.
    发明授权
    Process for fabricating an article comprising a magneto-optic garnet material 有权
    制造包含磁光石榴石材料的制品的方法

    公开(公告)号:US06733587B2

    公开(公告)日:2004-05-11

    申请号:US10091002

    申请日:2002-03-05

    IPC分类号: C30B2402

    CPC分类号: H01F10/245 G02F1/093

    摘要: Improvements in the production of high-performance latching magneto-optic garnet materials are provided. It has been recognized that high-Europium magneto-optic garnets will offer superior properties in devices such as isolators, circulators and interleavers. However, formation of, e.g., (BiEu)3(FeGa)5O12 on conventional, congruent composition, garnet substrates is difficult, due to poor lattice matching between the magneto-optic garnet and such conventional substrates. The invention addresses this problem, by utilizing a single crystal substrate composed essentially of a solid solution of two or more garnet materials. By use of a solid solution of two or more garnets, e.g., two congruent garnet compositions, an acceptable lattice parameter is able to be attained. Useful solid solutions include gadolinium scandium gallium garnet and gadolinium scandium aluminum garnet, or gadolinium scandium gallium garnet and terbium scandium gallium garnet.

    摘要翻译: 提供高性能闭锁磁光石榴石材料的生产改进。 已经认识到,高铕磁光石榴石将在诸如隔离器,循环器和交织器的装置中提供优异的性能。 然而,由于磁光石榴石和这种常规基板之间的格子匹配不良,难以形成例如(BiEu)3(FeGa)5 O 12的传统的等效组合物石榴石基材。 本发明通过利用主要由两种或多种石榴石材料的固溶体组成的单晶基板来解决这个问题。 通过使用两个或更多个石榴石的固溶体,例如两个一致的石榴石组合物,可以获得可接受的晶格参数。 有用的固体溶液包括钆镓镓石榴石和钆矾铝石榴石,或钆镓石榴石和铽镓石榴石。