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Synthetic anti-ferromagnetic structure with non-magnetic spacer for MRAM applications

机译:具有非磁性垫片的合成反铁磁结构,用于MRAM应用

摘要

A toggle MTJ cell is disclosed that has a nearly balanced SAF free layer with two major sub-layers separated by an anti-parallel coupling layer. Within each major sub-layer, there is a plurality of minor sub-layers wherein adjacent minor sub-layers are separated by a parallel coupling layer. The parallel coupling layer is a non-magnetic layer that may be a one or more of Ta, Cu, Cr, Ru, Os, Re, Rh, Nb, Mo, W, Ir, and V, a metal oxide, or dusting of NiCr, Ta, Cu, or NiFeCr. Magnetic moments of major sub-layers are made to be nearly equal so that the net moment of the SAF free layer is essentially zero. The MTJ cell and SAF free layer preferably have an aspect ratio of from 1 to 5. Ferromagnetic coupling between minor sub-layers enables a lower write current and lower power consumption than conventional toggle cell designs.
机译:公开了一种翻转MTJ单元,其具有接近平衡的SAF自由层,其两个主要子层由反平行耦合层隔开。在每个主要子层中,存在多个次要子层,其中相邻的次要子层由平行耦合层隔开。平行耦合层是非磁性层,其可以是Ta,Cu,Cr,Ru,Os,Re,Rh,Nb,Mo,W,Ir和V中的一种或多种,​​金属氧化物或NiCr,Ta,Cu或NiFeCr。使主要子层的磁矩几乎相等,使得SAF自由层的净矩基本上为零。 MTJ单元和SAF自由层的纵横比优选为1至5。与常规的肘节单元设计相比,次要子层之间的铁磁耦合实现了更低的写入电流和更低的功耗。

著录项

  • 公开/公告号US2008007994A1

    专利类型

  • 公开/公告日2008-01-10

    原文格式PDF

  • 申请/专利权人 YIMIN GUO;

    申请/专利号US20070901080

  • 发明设计人 YIMIN GUO;

    申请日2007-09-14

  • 分类号G11C11/02;

  • 国家 US

  • 入库时间 2022-08-21 20:11:22

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