Thermally activated magnetization reversal in a FeCoB nanomagnet. High-precision measurement method of coercive field, delta, retention time and size of nucleation domain

Measurements of spin polarization of FeB and FeCoB nanomagnets by the Anomalous Hall effect

A new method to measure the spin polarization of a ferromagnetic nanomagnet is proposed and experimentally demonstrated. A high precision, repeatability and simplicity are the features of the proposed method. The dependency of the spin polarization on the gate voltage and the bias current were observed.

系统测量FeCoB纳米磁体中自旋轨道相互作用的特性

Peculiarities of spin-orbit interaction systematically measured in FeCoB nanomagnets

本研究提出基于SO与外磁场线性正比特性的测量方法，系统揭示FeCoB纳米磁体中自旋轨道相互作用的体相界面差异、层数相关差异、周期性振荡及与退磁场、磁各向异性的关联，为优化纳米磁体特性提供关键依据。

Measurement of magnetic field induced by spin-accumulated electrons in a FeCoB nanomagnet

The spins, which are accumulated at a boundary of a nanomagnet due to the Spin Hall effect, induce a magnetic field, which tilts the nanomagnet magnetization out of its easy axis. Even though this magnetic field is relatively small (about 20 Gauss), it can reverse the magnetization of the nanomagnet if it is modulated in resonance with the magnetization precession and the conditions of the parametric resonance are met. Therefore, such magnetic field can be used to optimize the recording mechanism and to minimize the recording energy for MRAM. A high-precession measurement method of the spin-ac…

FeCoB纳米磁体中电流对磁各向异性与自旋轨道相互作用的调制

Modulation of Magnetic Anisotropy and Spin-Orbit Interaction by Electrical Current in FeCoB Nanomagnets

本研究提出测量纳米磁体中电流调制磁各向异性与自旋轨道相互作用的新方法，识别出平方电流（源于自旋霍尔效应）和线性电流（源于霍尔效应）两种贡献，前者在多层结构中显著增强，可实现高效数据记录，为MRAM优化提供新途径。

FeCoB纳米磁体中自旋轨道相互作用的栅压调制特征与特性：VCMA效应物理起源的洞察

Features and Peculiarities of Gate-Voltage Modulation of Spin-Orbit Interaction in FeCoB Nanomagnets: Insights into the Physical Origins of the VCMA Effect

该研究通过实验探究Ta/FeB/MgO纳米磁体中各向异性场与自旋轨道相互作用的栅压依赖特性，明确自旋轨道调制不是VCMA效应的主因，磁化强度调制更可能为其起源，指出平衡两种相反极性贡献可增强VCMA效应。

Mechanism of parametric pumping of magnetization precession in a nanomagnet. Parametric mechanism of current-induced magnetization reversal

A mechanism of current-induced magnetization reversal based on the parametric resonance is described. The source of the magnetization reversal is a current-induced magnetic field, which is applied perpendicularly to the easy axis of magnetic anisotropy of a ferromagnetic nanomagnet. The current-induced magnetic field was measured in a FeCoB nanomagnet to be 60 Gauss at a current density of 65 mA/um2. Two mechanisms of the magnetization reversal are described and calculated. The first mechanism is the reversal by a RF electrical current, which modulated at a frequency close to the precession fr…