准同型钴矿中的微型磁性纳米岛
Miniature Magnetic Nano islands in a Morphotropic Cobaltite Matrix
摘要：
高密度磁存储器是自旋电子学、量子计算和节能电子学中的关键部件。纳米尺度下的降维和磁畴稳定性对于磁存储单元的小型化至关重要。然而，诱导磁序和选择性地调整特定位置的自旋轨道耦合仍然具有挑战性。在这里，我们展示了基于钴酸盐同质结构的可切换磁性纳米岛的构建。的磁性和电子状态的横向修改的外延应变，这是区域控制的独立膜。原子上尖锐的晶界隔离了磁性不同区域之间的串扰。磁性纳米岛的最小尺寸直径达到35 nm，实现了每平方英寸400 Gbit的面密度。除了为精确控制的读写方案提供理想的平台外，这种方法还可以在硅和柔性衬底上实现可扩展和图案化的存储器，用于各种应用。
英文摘要：
High-density magnetic memories are key components in spintronics, quantum computing, and energy-efficient electronics. Reduced dimensionality and magnetic domain stability at the nanoscale are essential for the miniaturization of magnetic storage units. Yet, inducing magnetic order, and selectively tuning spin-orbital coupling at specific locations have remained challenging. Here we demonstrate the construction of switchable magnetic nano-islands in a nonmagnetic matrix based on cobaltite homo-structures. The magnetic and electronic states are laterally modified by epitaxial strain, which is regionally controlled by freestanding membranes. Atomically sharp grain boundaries isolate the crosstalk between magnetically distinct regions. The minimal size of magnetic nano-islands reaches 35 nm in diameter, enabling an areal density of 400 Gbit per inch square. Besides providing an ideal platform for precisely controlled read and write schemes, this methodology can enable scalable and patterned memories on silicon and flexible substrates for various applications.
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