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Quantitative Magnetic Characterization of Synthetic Ferrimagnets for Predictive Spin-Dynamic Behavior

機(jī)譯:預(yù)測性自旋動力學(xué)行為的合成鐵鹽的定量磁性表征

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Geometric or magnetic asymmetries in synthetic antiferromagnetic particles give rise to ferrimagnetic-like magnetization behavior, both quasi-static and dynamic. Such asymmetries in synthetic ferrimagnets can originate from a thickness imbalance or a fringing field from the reference layer in a nanopillar stack. In this paper, we theoretically describe the effects of the corresponding magnetic asymmetry contribution on the structure's static and spin-dynamic behavior. The developed model is then used to experimentally determine the asymmetry parameters of typical nanoscale spin-flop junctions, as well as successfully describe their microwave resonant properties, such as the frequency splitting and the field dependence of the optical spin-resonance spectra.
機(jī)譯:合成反鐵磁粒子中的幾何或磁不對稱會導(dǎo)致類似鐵磁的磁化行為,準(zhǔn)靜態(tài)和動態(tài)。合成鐵質(zhì)香檳酒中的此類不對稱性可能源自納米柱堆中參考層的厚度不平衡或邊緣場。在本文中,我們從理論上描述了相應(yīng)的磁不對稱貢獻(xiàn)對結(jié)構(gòu)的靜態(tài)和自旋動力學(xué)行為的影響。然后,將開發(fā)的模型用于通過實驗確定典型納米級自旋觸發(fā)器結(jié)的不對稱參數(shù),并成功地描述了它們的微波諧振特性,例如頻率分裂和光學(xué)自旋諧振譜的場依賴性。

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