Ferromagnetic side layers sandwiching a nonmagnetic spacer as a metallic trilayer has become a pivotal platform for achieving spintronic devices. Recent experiments demonstrate that manipulating the width or the nature of conducting spacer induces noncollinear magnetic alignment between the side layers. Our theoretical analysis reveals that altering the width of spacer significantly affects the interlayer exchange coupling (IEC), resulting in noncollinear alignment. Through analytic and first-principles methods, our study on the Fe/Ag/Fe trilayer shows that at a specific width of the Ag spacer, the magnetic moments of side layers tend to be perpendicular. This alignment is mediated by Ag quantum well states, exhibiting spin spirals across the trilayer. Our results reveal that the noncollinear IEC offers a degree of freedom to control magnetic devices and boot spintronic technology with improved transport capabilities.

中文翻译：

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在磁性三层中本质上驱动非共线层间交换耦合


将非磁性垫片夹在金属三层中的铁磁侧层已成为实现自旋电子器件的关键平台。最近的实验表明，操纵导电垫片的宽度或性质会在侧层之间诱导非共线磁对准。我们的理论分析表明，改变间隔区的宽度会显着影响层间交换耦合 （IEC），从而导致非共线对齐。通过分析和第一性原理方法，我们对 Fe/Ag/Fe 三分子层的研究表明，在 Ag 间隔物的特定宽度下，侧层的磁矩趋于垂直。这种排列是由 Ag 量子阱态介导的，在三层上表现出自旋螺旋。我们的结果表明，非共线 IEC 为控制磁性器件和引导自旋电子技术提供了一定程度的自由度，并提高了传输能力。