雷奕
,
黑祖昆
,
Mohique
,
Calvo-Dahlborg
,
Jean-Marie
,
Dubois
,
DONG
,
Chuang
金属学报
分析了块状非晶与稳定准晶结构上的异同点, 选择两种稳定准晶(二十面体准晶和十次准晶)相互混乱合, 在保持准晶二十面体基本结构单元的基础上, 增加元素组成的混乱度, 再添加有利于形成高配位多面体的元素Zr, 用急冷方法制备出非晶合金. 对此非晶合金的热力学测试表明, 该非晶形成能力和稳定性与Inoue的Zr65Al7.5Cu17.5Ni10非晶相近.
关键词:
锆基非晶合金
,
null
,
null
Physical Review B
In a recent publication [S. Dong et al., Phys. Rev. Lett. 103, 127201 (2009)], two (related) mechanisms were proposed to understand the intrinsic exchange bias present in oxides heterostructures involving G-type antiferromagnetic perovskites. The first mechanism is driven by the Dzyaloshinskii-Moriya interaction, which is a spin-orbit coupling effect. The second is induced by the ferroelectric polarization, and it is only active in heterostructures involving multiferroics. Using the SrRuO(3)/SrMnO(3) superlattice as a model system, density-functional calculations are here performed to verify the two proposals. This proof-of-principle calculation provides convincing evidence that qualitatively supports both proposals.
关键词:
thin-films;weak ferromagnetism;superlattices;anisotropy;bifeo3;srruo3;model
