Tunable remanent state resonance frequency in arrays of magnetic nanowires
Tunable remanent state resonance frequency in arrays of magnetic nanowires
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DOI：
10.1063/1.1507610
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发表时间：
2002-09-09
影响因子：
4
通讯作者：
Huynen, I
中科院分区：
文献类型：
--
作者：
Encinas, A;Demand, M;Huynen, I
研究了不同成分NiCu、NiFe、CoNiFe和CoFe合金的饱和磁化强度对电沉积磁性纳米线阵列中零场微波吸收或自然铁磁共振谱的影响。测量表明，由于形状各向异性，这些系统在没有外加磁场的情况下，由于铁磁共振，在GHz范围内呈现出强的吸收峰。此外，零场共振频率与线材直径和密度以及磁历史无关，其值仅与材料有关，通过饱和磁化强度和回旋磁因子。结果表明，使用不同的电解溶液和在不同的静电电位下沉积，合金成分可以发生变化，剩余状态谐振频率可以在4 ~ 31 GHz之间准连续地调整。(C) 2002年美国物理研究所。
The zero-field microwave absorption, or natural ferromagnetic resonance, spectra in arrays of electrodeposited magnetic nanowires is studied as a function of the saturation magnetization of NiCu, NiFe, CoNiFe, and CoFe alloys of several compositions. Measurements show that due to the shape anisotropy, these systems present strong absorption peaks in the absence of an applied magnetic field in the GHz range due to the ferromagnetic resonance. Furthermore, the zero-field resonance frequency is observed to be independent of the wire diameter and density as well as the magnetic history and its value depends only on the material, through the saturation magnetization and the gyromagnetic factor. It is shown that, using different electrolytic solutions and depositing at different electrostatic potentials, the alloy composition can be varied and the remanent state resonance frequency can be tailored quasicontinuously between 4 and 31 GHz. (C) 2002 American Institute of Physics.