Micromagnetic modal analysis of spin-transfer-driven ferromagnetic resonance of individual nanomagnets
Micromagnetic modal analysis of spin-transfer-driven ferromagnetic resonance of individual nanomagnets
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DOI：
10.1063/1.2710737
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发表时间：
2007-04
影响因子：
3.2
通讯作者：
L. Torres;G. Finocchio;L. Lopez-Diaz;E. Martínez;M. Carpentieri;G. Consolo;B. Azzerboni
中科院分区：
文献类型：
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作者：
L. Torres;G. Finocchio;L. Lopez-Diaz;E. Martínez;M. Carpentieri;G. Consolo;B. Azzerboni
在最近的一项调查中，桑基等人。Rev. Lett. 96, 227601(2006)]演示了一种测量单个椭球形PyCu纳米磁体（小至30×90×5.5nm3）中自旋转移驱动的铁磁共振的技术。本文采用全微磁建模的方法对这些实验进行了分析，发现了定量的一致性，并对实验中发现的正态模态的空间分布进行了启发。计算中使用的磁参数集是通过拟合静态磁阻测量得到的。温度效应还包括了所有对有效场的非均匀贡献，如静磁耦合和安培场。slonchzewski的偏振函数[J]。粉剂。粉剂。Mater. 159, L1(1996)]的使用，包括其空间和角度依赖性。实验自旋转移驱动的铁磁共振谱用与实验中相同的电流再现。采用全微磁建模全部…
In a recent investigation Sankey et al. [Phys. Rev. Lett. 96, 227601 (2006)] demonstrated a technique for measuring spin-transfer-driven ferromagnetic resonance in individual ellipsoidal PyCu nanomagnets as small as 30×90×5.5nm3. In the present work, these experiments are analyzed by means of full micromagnetic modeling finding quantitative agreement and enlightening the spatial distribution of the normal modes found in the experiment. The magnetic parameter set used in the computations is obtained by fitting static magnetoresistance measurements. The temperature effect is also included together with all the nonuniform contributions to the effective field as the magnetostatic coupling and the Ampere field. The polarization function of Slonczewski [J. Magn. Magn. Mater. 159, L1 (1996)] is used including its spatial and angular dependences. Experimental spin-transfer-driven ferromagnetic resonance spectra are reproduced using the same currents as in the experiment. The use of full micromagnetic modeling all...