Antiferromagnetic CuMnAs multi-level memory cell with microelectronic compatibility.
Antiferromagnetic CuMnAs multi-level memory cell with microelectronic compatibility.
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DOI：
10.1038/ncomms15434
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发表时间：
2017-05-19
影响因子：
16.6
通讯作者：
Jungwirth T
中科院分区：
文献类型：
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作者：
Olejník K;Schuler V;Marti X;Novák V;Kašpar Z;Wadley P;Campion RP;Edmonds KW;Gallagher BL;Garces J;Baumgartner M;Gambardella P;Jungwirth T
反铁磁体提供了一种独特的特性组合，包括辐射和磁场硬度，没有杂散磁场，以及太赫兹的自旋动力学频率尺度。最近的实验表明，相对论自旋轨道力矩可以提供一个有效的反铁磁力矩的电控制的手段。在这里，我们表明，从一个单层的反铁磁CuMnAs沉积在III-V或Si衬底上制成的基本形状的存储单元具有确定性的多电平开关特性。它们允许计数和记录数千个输入脉冲，并响应长度缩小到数百皮秒的脉冲。为了证明与普通微电子电路的兼容性，我们在标准印刷电路板中实现了反铁磁位单元，该标准印刷电路板由计算机通过USB接口在环境条件下管理和供电。我们的研究结果开辟了一条通往专门的嵌入式存储器逻辑应用和基于反铁磁体的超快组件的道路。基于反铁磁材料的器件具有对外部磁场的鲁棒性和超快操作的潜力的优点。在这里，作者提出了一个多级反铁磁存储单元，可以使用标准的电子接口进行操作。
Antiferromagnets offer a unique combination of properties including the radiation and magnetic field hardness, the absence of stray magnetic fields, and the spin-dynamics frequency scale in terahertz. Recent experiments have demonstrated that relativistic spin-orbit torques can provide the means for an efficient electric control of antiferromagnetic moments. Here we show that elementary-shape memory cells fabricated from a single-layer antiferromagnet CuMnAs deposited on a III–V or Si substrate have deterministic multi-level switching characteristics. They allow for counting and recording thousands of input pulses and responding to pulses of lengths downscaled to hundreds of picoseconds. To demonstrate the compatibility with common microelectronic circuitry, we implemented the antiferromagnetic bit cell in a standard printed circuit board managed and powered at ambient conditions by a computer via a USB interface. Our results open a path towards specialized embedded memory-logic applications and ultra-fast components based on antiferromagnets. Devices based on antiferromagnetic materials have advantages of robustness to external magnetic fields and the potential for ultrafast operation. Here the authors present a multilevel antiferromagnetic memory cell that can be operated using standard electronic interfaces.