基于多铁逻辑的铁磁耦合互连线磁化动态模拟  

Magnetization dynamics in ferromagnetic coupling interconnect wire using multiferroic logic scheme

作　　者：杨晓阔[1] 张斌[1] 崔焕卿[1] 李伟伟[1] 王森[1] 

机构地区：[1]空军工程大学理学院,西安710051

出　　处：《物理学报》2016年第23期269-274,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:61302022);空军工程大学理学院博士后科研启动基金(批准号:2015BSKYQD03)资助的课题~~

摘　　要：建立了多铁纳磁体逻辑器件的铁磁耦合作用模型,通过施加应变时钟对铁磁耦合互连线的磁化动态进行了理论模拟.结果表明:合适的应力(19.7—20.1 MPa)能够实现近180?磁化翻转,完成逻辑态在铁磁耦合互连线中的正确传递;多铁纳磁体间的强耦合阻碍器件的有效磁化翻转,这可能源于小间距增强了纳磁体的面外磁化,从而阻碍了面内翻转.研究结论可为多铁逻辑电路的设计提供重要指导.Nowadays, the intense research effort is focused on exploring alternative emerging device to perform binary logical function. A promising device technology is multiferroic nanomagnet logic. The main reason for the interest in this nanomagnetic switch is its nonvolatility and comparatively low power consumption in combination with the ability to perform logic and storage in one single element. The basic element of multiferroic nanomagnet logic is a sub-100 nm size single domain magnet. Usually, the x-y direction defines the in-plane dimension, while the z axis direction depicts the thickness of nanomagnet. The in-plane magnetizations along easy axis are used to encode binary logic states ‘1＇and ‘0＇, respectively; while along the hard axis they denote ‘null＇ logic. The logic operation and data transmission in magnetic logic are realized by the dipole-coupled magnetostatic interactions. In multiferroic nanomagnet logic, the interconnect wire is a very important component since it forms data transmission channel of any nanomagnetic logic circuit.There are two kinds of interconnected wires in this technology, namely antiferromagnetic coupling interconnected wire and ferromagnetic coupling interconnected wire. In this paper, the switching dynamics of a multiferroically and nanomagnetically interconnected wire employing ferromagnetic coupling is simulated by solving the Landau-Lifshitz-Gilbert equation with neglecting the thermal fluctuation effects. The wires are implemented with dipole-coupled two-phase（magnetostrictive/piezoelectric） multiferroic elements that are clocked with electrostatic potentials of 100 mV applied to the piezoelectric layer generating 20 MPa stress in the magnetostrictive layers for switching. Specifically, the ferromagnetic coupling effect model for multiferroic nanomagnet interconnected wire is established, and its magnetization dynamics is simulated by using different stress clocking. It is found that moderate strain（19.7–20.1 MPa） can ensure-180°magnetization reversal,

关 键 词：多铁逻辑 铁磁耦合 互连线 磁化动态 

分 类 号：O482.54[一般工业技术—材料科学与工程]