具有垂直各向異性的Co/Pt多層膜中各Co層之間鐵磁性耦合

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基金項目:

國家自然科學基金(No.50471093)；北京市自然科學基金（No．2052014）和新世紀優秀人才支持計劃（NCEF－04－0104）資助項目

Ferromagnetic coupling between Co layers in Co/Pt multilayer with perpendicular anisotropy

Materials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China

摘要: 主要研究了硼對低鈷(質量分數小于5%)儲氫合金電化學性能的影響,并設計了Mm (NiCoMnAlB)_5+χ(χ=0.02,0.03,0.05,0.1,0.2,0.3)一系列非化學配分鑄態合金成分.結果表明,硼的加入可以提高活性和高倍率性能,但降低合金的放電容量.微觀分析可知,加入硼可形成第二相,提高活性和高倍率性能.同時利用MASTER軟件對合金成分進行了優化,得出最佳合金成分Mm (NiCoMnAlB)_5.1,預測出新合金成分Mm (NiCoMnAlB)_5.08,并用實驗方法驗證了性能結果.
- 鐵磁性耦合 /
- 垂直磁各向異性 /
- 矯頑力 /
- 磁滯回線
Abstract: A series of glass/NiO(lnm)/[Co(0.4nm)/Pt(0.5nm)]₃/Pt(xnm)/[Co(0.4nm)/Pt(0.5 nm)]₃ samples with different Pt interlayer thicknesses were prepared by magnetron sputtering to determine the ferromagnetic coupling between Co layers across the Pt layer. The measured results of major and minor hysteresis loops show that the ferromagnetic coupling between the top and bottom Co/Pt multilayer decreases monotonously with the increase of Pt layer thickness and disappears as the Pt layer thickness over 4 nm. In addition to the ferromagnetic coupling, there exists a weak biquadratic coupling, which induces the broad transition of the bottom Co/Pt multilayer.
- ferromagnetic coupling /
- perpendicular anisotropy /
- coercivity /
- hysteresis loop