Study on the Effects of Element Substitution, Electronic Nematic Order and Domain Wall Pinning in Perovskite Manganites 钙钛矿结构锰氧化物中的元素替代、电子向列有序与畴壁钉扎效应研究
A Possible model for Exclusion of Cosmic Vacuum Domain Wall 消除宇宙真空畴壁的一个可能的模型
This paper discusses the technology of refining domain wall space decreasing iron loss and improving nature of silicon steel sheet by pulse laser irradiation. 介绍了用脉冲激光照射取向硅钢片实现细化磁畴、降低铁损、改善性能的方法;
The Transition Process of Magnetic Domains and Domain Wall State in Small Thin Film Magnetoresistive Elements 微型薄膜磁阻传感元件的磁畴和畴壁状态的转变过程
The Resistance Function Research of Domain Wall Motion in Ni_xZn_1-x Fe_2O_4 Ferrite NixZn(1-x)Fe2O4铁氧体畴壁运动阻力函数的研究
Non-coherent domain wall displacement mechanism in the hardened 2-17 rare earth cobalt magnets 硬化型2-17稀土钴永磁体中的非一致壁移机制
Influence of static bias magnetic field on the domain wall length of the three 直流偏磁场对三类硬磁畴畴壁长度的影响
When the thickness of Cu intermediate layer is more than 3 nm, the magnetic bubbles vanish and ripple magnetic domain structure with 180 ° domain wall can be observed, due to the weakening ferromagnetic coupling effect between Co layers. 当Cu中间层厚度大于3nm时,铁磁层之间的耦合作用减弱,纳米多层膜为面内易磁化,磁泡结构的磁畴消失,全部为具有波纹状的接近180°畴壁的磁畴结构。
A new phenomenon in linbo_3 crystal& conjecturing the existence of 90 ° domain wall in linbo_3 crystal LiNbO3晶体中的一个新现象&推测LiNbO3晶体中存在90°畴壁
Finally, a simple introduce of homotopy is employed. The classification of the static magnetic domain wall structures of tube-and envelope-type is made in an unified way using the homotopy theory. 并且简单介绍了拓扑学中同伦论的历史和思想,为后面提出新的解析方法进行理论上的铺垫。本文从拓扑学角度,对管状磁畴壁和闭合磁畴壁静态结构的分类问题,做了统一处理。
SH Type Electro-Acoustic Surface Waves in a Two-Layered Piezoelectric Plate with 180 ° Ferroelectric Domain Wall 双层压电板的180°畴中传播的SH型电声表面波研究
When the domain wall motion is nonreversible, the χ″( H) is the largest value χ max when the H is 4.2 mT. 在不可逆畴壁移动过程中,当H为4.2mT时,χ〃(H)达到最大值χmax;
The Domain Layer Wave in a Sandwich Structure with 180 ° Ferroelectric Domain Wall 180°铁电畴夹层结构中的畴层波
Driving traction, nucleation criterion, velocity of domain wall motion, kinetic relation and rate of domain switching in a single grain are given. 给出了单畴内畴变驱动力、新畴形核准则、畴界运动速度公式、畴变动力学的表达式,单晶的畴变速率公式;
A domain wall ( soliton) or an anti-domain wall will be formed when transition occuring from PDB to PDA, or from PDA to PDB, and these transitions are mainly, due to the behavior of π& electrons. 在聚丁二炔链上,当出现从PDB相向PDA相转变时,会出现一个畴壁和反畴壁,这个相变的出现主要是由于π电子重新分布的结果。
In chapter four, based on the law of domain nucleation and domain wall motion of 1800 domain switching, a new scheme of domain switching and numerical simulation approach is put forward on the foundation of thermodynamics. 第四章以铁电体1800畴变的过程中形核规律和畴界运动规律的实验观察结果为基础,根据热力学理论建立铁电体畴变的理论框架和数值模拟方法;
By the magnetostatic interaction energy between vertical-Bloch-lines ( VBLs), the domain wall energy formula of the circular hard domains is improved, on the basis of the experimental phenomena. There is only one parameter c which is determined by simulated the experimental data of a typical sample. 本文以实验现象为基础,利用相邻布洛赫线间的静磁作用能,改进圆柱形硬磁畴的畴壁能公式,公式中只使用了一个由实验数据拟合而确定的参数c。
For the hard magnetic layer, the magnetization reversal process belongs to displace of the domain wall of formed nucleus; 硬磁层主要是通过形核的畴壁移动来实现其反磁化过程的。
The peculiar line shape of nuclear magnetic resonance of Fe ⅱ arises from the anisotropic hyperfine interactions and the domain wall excitation. 各向异性超精细相互作用及畴壁位移激发造成了FeⅡ的奇异核磁共振线形。
Quantum effect of moving domain wall 畴壁运动的量子效应
The research of dynamic behavior of domain wall in Ni-Zn ferrite 镍锌铁氧体磁畴壁动力学行为的研究
For a perpendicular anisotropic thin film, magnetic force microscopy directly gives its domain structure diagram. The component perpendicular to the film plane gives the position of the domain and the domain wall. 对于垂直各向异性的薄膜,磁力显微镜图直接给出了它的磁畴结构图,杂散场垂直于膜面的分量给出了它的磁畴和畴壁位置。
We show that the vertical spin stiffness makes the domain wall violate the ideal Neel wall structure, resulting in a spiral feature. 我们发现这项垂直自旋刚度会导致磁畴壁偏离理想的Neel结构而出现螺旋形结构。
Moreover, the motion of domain wall was inhibited, and strain delay is small. 同时畴壁的运动受到抑制,场致应变的回滞很小。
As the soft layer increases, the coercivity mechanism transforms from nucleation to pinning. But when the strength of interface exchange coupling is weak, the center of domain wall pins the hard/ soft interface rather than in the hard layer. 随软磁相厚度的增大,矫顽力机制从成核变为钉扎;但当界面交换耦合作用较弱时,畴壁中心最终钉扎在两相界面处而没进入硬磁相内部。
In the pseudospin representation, we investigate the response of the domain wall to rotation, and we find that in response to rotation, the spins on the domain walls twist and form spatially periodic "eyebrow-like" spin textures. 在赝自旋表象中,我们研究了旋转对自旋畴壁的影响,发现自旋畴壁对旋转的响应是形成空间周期性的眼眉状自旋纹理。
The formation of different domain wall patterns can be attributed to the complicated interplay of the anisotropic strain relief and rotational epitaxy. 形成不同形状畴壁的原因可以认为是应力释放和转动外延的相互作用力所导致的。
We demonstrate that the spin-orbit coupling locks the relative phase of the two-component condensates at ±π/ 2, thus breaks the spin rotational symmetry in the x-y plane and restricts the type of the domain wall to Bloch wall. 我们证明自旋轨道耦合将两分量玻色-爱因斯坦凝聚体的基态相位差锁定在±π-2,从而打破了自旋沿x-y平面的旋转对称性,将自旋畴壁的类型限定在了布洛赫壁。
Analyses show that the interface coupling constant Ji has significant effect on the nucleation field only when the soft layer thickness is about 10% of the domain wall width of the soft phase while the thickness of the hard layer is larger than its domain wall width. 分析发现,当软磁相厚度约为软磁相布洛赫壁宽度的十分之一且硬磁相厚度大于硬磁相的布洛赫壁宽度时,界面交换耦合常数对成核场的影响会非常显著。
The macroscopic magnetic properties like permeability and magnetization are influenced by stress, which can be explained by the magnetic moments rotation and domain wall displacement of microscopic domain caused by the coupling of stress and internal or applied field. 应力影响到铁磁材料的磁导率、磁化强度等宏观参量,这种影响源于磁畴在应力场和内外磁场的耦合作用下发生的磁矩转向及畴壁位移。