论文部分内容阅读
原子间的自旋相互作用力对原子级别磁性纳米构造体的表面磁性质的理解是极为重要的.磁交换力显微镜是测量表面自旋作用力的重要手段,但它的缺点一是需要加外部强磁场,二是不能分离表面形貌和自旋信息,这就导致材料表面受外部磁场的影响,而且表面形貌和自旋信息之间相互影响,使自旋间的相互作用力的检测和成像研究受到限制.为了解决上述问题,利用原子力显微镜,并采用微波照射的方法,根据铁磁共振原理,分别独立提取磁性材料表面形貌和自旋信息,称之为铁磁共振磁交换力显微镜,理论和实验结果表明此方法可以有效地分离两种信息.铁磁共振磁交换力显微镜可以促进对原子级磁性材料机能的理解以及磁性相关科学领域的进步,特别是对自旋电子元件的发展有很大的促进作用,是新世纪高度信息化社会不可缺少的测量技术.
It is very important to understand the surface magnetic properties of atom-level magnetic nanostructures by the interaction force between atoms.Magnetic exchange force microscopy is an important method to measure the surface spin-force, but its disadvantage is that it needs to add external Strong magnetic field, the second is the separation of surface morphology and spin information, which leads to the material surface by the external magnetic field, and the interaction between the surface morphology and spin information, so that the interaction between the spin detection and Imaging research is limited.To solve the above problems, the use of atomic force microscopy and microwave irradiation method, according to the principle of ferromagnetic resonance, respectively, the magnetic material surface morphology and spin information independently extracted, called the ferromagnetic resonance force exchange microscopy , The theoretical and experimental results show that this method can effectively separate the two kinds of information.The ferromagnetic resonance magnetic exchange force microscope can promote the understanding of the function of atomic magnetic materials and the progress in the field of magnetic related sciences especially for the development of spintronic components Has a great role in promoting, is an indispensable measurement technology in a highly informatized society in the new century.