Popov Maksym, Zavislyak Igor, Qu Hongwei, Balbashov A M, Page M R, Srinivasan G
Faculty of Radiophysics, Electronics and Computer Systems, Taras Shevchenko National University of Kyiv, Kyiv, 01601, Ukraine.
Department of Physics, Oakland University, Rochester, MI, 48309, USA.
Sci Rep. 2022 Mar 30;12(1):5374. doi: 10.1038/s41598-022-09363-x.
This report is on the observation and analysis of nonlinear magnetoelectric effects (NLME) for in-plane currents perpendicularly to the hexagonal axis in single crystals and liquid phase epitaxy grown thin films of barium hexaferrite. Measurements involved tuning of ferromagnetic resonance (FMR) at 56-58 GHz in the multidomain and single domain states in the ferrite by applying a current. Data on the shift in the resonance frequency with input electric power was utilized to estimate the variations in the magnetic parameter that showed a linear dependence on the input electric power. The NLME tensor coefficients were determined form the estimated changes in the magnetization and uniaxial anisotropy field. The estimated NLME coefficients for in-plane currents are shown to be much higher than for currents flowing along the hexagonal axis. Although the frequency shift of FMR was higher for the single domain resonance, the multi-domain configuration is preferable for device applications since it eliminates the need for a large bias magnetic field. Thus, multidomain resonance with current in the basal plane is favorable for use in electrically tunable miniature, ferrite microwave signal processing devices requiring low operating power.
本报告是关于对六方铁酸钡单晶及液相外延生长薄膜中垂直于六方轴的面内电流的非线性磁电效应（NLME）进行的观察与分析。测量包括通过施加电流在铁氧体的多畴和单畴状态下于56 - 58GHz调谐铁磁共振（FMR）。利用共振频率随输入电功率的变化数据来估计磁参数的变化，该变化对输入电功率呈线性依赖。NLME张量系数由估计的磁化强度和单轴各向异性场的变化确定。结果表明，面内电流的估计NLME系数远高于沿六方轴流动的电流的系数。尽管单畴共振的FMR频移更高，但多畴配置更适合器件应用，因为它无需大的偏置磁场。因此，基面内有电流的多畴共振有利于用于需要低工作功率的电可调微型铁氧体微波信号处理器件。
