论文标题
在刚性和柔性底物上制备的垂直合成反铁磁体中的磁化反转和域结构
Magnetization reversal and domain structures in perpendicular synthetic antiferromagnets prepared on rigid and flexible substrates
论文作者
论文摘要
由非磁性金属间隔层隔开的铁磁（FM）层可以表现出Ruderman Kittel Kasuya Yosida（Rkky）耦合，这可能会导致稳定的合成抗Firomagnetic（SAF）相。在本文中，我们通过改变刚性SI（100）和柔性聚酰亚胺基板上的双层堆栈（PT/CO）和IR空间层TIR的厚度来研究[CO/PT]层中的磁化逆转。带有TIR = 1.0 nm的样品显示了FM耦合，而TIR = 1.5 nm的样品显示了FM层之间的AFM耦合。在TIR = 2.0 nm时，它显示出一个弓形磁滞回路，表明在逆转处进行了磁化。与层间交换偶联（IEC）的能量相比，较高的各向异性能量表明，上下FM层的磁化值之间的相对角度较小。我们还证明了应变诱导的IEC的修饰以及磁化逆转现象。 IEC在应用压缩应变时显示出略有减少，并在应用拉伸应变时增加，这表明SAFS在柔性旋转中的潜力。
Ferromagnetic (FM) layers separated by nonmagnetic metallic spacer layers can exhibit Ruderman Kittel Kasuya Yosida (RKKY) coupling which may lead to a stable synthetic antiferromagnetic (SAF) phase. In this article we study magnetization reversal in [Co/Pt] layers by varying the number of bilayer stacks (Pt/Co) as well as thickness of Ir space layer tIr on rigid Si(100) and flexible polyimide substrates. The samples with tIr = 1.0 nm shows a FM coupling whereas samples with tIr = 1.5 nm shows an AFM coupling between the FM layers. At tIr = 2.0 nm, it shows a bow-tie shaped hysteresis loop indicating a canting of magnetization at the reversal. Higher anisotropy energy as compared to the interlayer exchange coupling (IEC) energy is an indication of the smaller relative angle between the magnetization of lower and upper FM layers. We have also demonstrated the strain induced modification of IEC as well as magnetization reversal phenomena. The IEC shows a slight decrease upon application of compressive strain and increase upon application of tensile strain which indicates the potential of SAFs in flexible spintronics.
