Magnetoresistive detection of spin waves

We explore a detection method for spin-waves that consists of integrating a magneto-resistive sensor on a magnonic waveguide. When subjected to the stray magnetic field generated by the spin-wave, the relative orientation of the magnetizations of the two magnetic layers in the sensor oscillates in time, resulting in an electrical resistance change according to the so-called giant magneto-resistance effect. Upon application of an appropriate current bias, this variation of resistance translates into a sizable microwave voltage. At the sub-micrometer scale explored here, this signal is about fifty times larger than the one extracted from conventional inductive measurements of spin-waves for comparable detection areas. Moreover, such a detection scheme is expected to scale very favorably down to the nanometer size relevant for future magnon-based data processing architectures., , , # Magnetoresistive detection of spin waves Dataset DOI: [10.5061/dryad.zw3r228kj](10.5061/dryad.zw3r228kj) ## Description of the data and file structure This dataset contains all the data exposed in the manuscript. ### Files and variables #### File: Inductive_20mT_1p5mA.txt **Description:**Â Fig. 2A. Corresponds to the inductive contribution in the total signal shown in Fig. 1C (pIDC_mIDC_20mT_1p5mA.txt) ##### Variables * Frequency: Microwave frequency applied in the exciting antenna (GHz) * Re(SigmaZ21): Blue (dashed), real part of the inductive contribution (mohms) * Im(SigmaZ21): Red, imaginary part of the inductive contribution (mohms) * Mag(SigmaZ21): Black (dotted), modulus of the inductive contribution (mohms) #### File: kalinikos_Py.txt **Description:**Â Fig. 2D blue curve. Theoretical resonance frequency of the spin-wave in the Permalloy (Py) waveguide vs applied field (Kalinikos and Slavin model) ##### Variables * Field: Magnitude of the applied field (mT) * Frequenc...我们研究了一种自旋波（spin-waves）检测方法，该方法通过在磁子波导（magnonic waveguide）上集成磁阻传感器（magneto-resistive sensor）实现。当受到自旋波产生的杂散磁场作用时，传感器内两层磁性薄膜的磁化强度相对取向会随时间振荡，进而根据所谓的巨磁阻效应（giant magneto-resistance effect）引发电阻变化。施加合适的电流偏置后，该电阻变化可转化为可观的微波电压信号。在本次研究探索的亚微米尺度下，对于相当的检测面积，该信号强度约为传统感应式自旋波检测方法所得信号的50倍。此外，该检测方案有望在尺寸上实现优异的尺度缩小，适配未来基于磁子的数据处理架构所需的纳米级尺度。 # 自旋波的磁阻检测 数据集DOI：[10.5061/dryad.zw3r228kj] ## 数据与文件结构说明 本数据集包含论文手稿中呈现的全部实验数据。 ### 文件与变量 #### 文件：Inductive_20mT_1p5mA.txt **说明：** 对应图2A。为图1C（pIDC_mIDC_20mT_1p5mA.txt）所示总信号中的感应分量。 ##### 变量 * 频率（Frequency）：激励天线所施加的微波频率（单位：GHz） * 实部(Re(SigmaZ21))：蓝色（虚线），感应分量的实部（单位：毫欧(mΩ)） * 虚部(Im(SigmaZ21))：红色，感应分量的虚部（单位：毫欧(mΩ)） * 模值(Mag(SigmaZ21))：黑色（点线），感应分量的模值（单位：毫欧(mΩ)） #### 文件：kalinikos_Py.txt **说明：** 对应图2D的蓝色曲线。为坡莫合金（Permalloy，Py）波导中自旋波的理论共振频率与外加磁场的关系（基于Kalinikos与Slavin模型）。 ##### 变量 * 磁场强度（Field）：外加磁场的幅值（单位：毫特斯拉(mT)） * Frequenc...