FeCoNiMnY高熵薄膜的软磁性能及噪声抑制特性

Soft magnetic and noise suppression properties ofFeCoNiMnY high-entropy thin films

采用电化学沉积法制备了FeCoNiMnY高熵薄膜,利用XRD、VSM和VNA等测试手段对其性能进行表征,并研究了不同Y元素浓度对高熵薄膜晶体结构、软磁性能和噪声抑制特性的影响。结果表明,Y的添加一方面粗化了晶粒尺寸,增加了合金矫顽力(从12.09 kA/m增加至21.7 kA/m);另一方面,元素Y的添加引起的晶格畸变提高了高熵薄膜的电阻率(高达336μΩ·mm)。FeCoNiMnY高熵薄膜的最大功率损耗比在6.1 GHz处可达到0.84。上述结果表明,FeCoNiMnY噪声抑制片在千兆赫频率下的抗电磁干扰应用中具有很大的潜力。

FeCoNiMnY films were prepared by electrochemical deposition.Their properties were characterized by XRD,VSM,and VNA.The effects of different Y element concentrations on the phase change,soft magnetic properties,and noise suppression were studied.The results show that element Y increases coercivity(from 12.09 kA/m to 21.7 kA/m)caused by grain growth.In addition,the lattice distortion induced by the addition of element Y increases the resistivity of high-entropy films(up to 336μΩmm).The maximum power loss ratio of FeCoNiMnY high-entropy films could reach 0.84 at 6.1 GHz.The above results indicate that the FeCoNiMnY noise suppression sheet has great potential in anti-EMI applications at gigahertz frequencies.