新型多铁材料KBiFe2O5由于其光学带隙仅为1.6eV,处于可见光谱范围内,受到了越来越多的关注.KBiFe2O5理论光电效率可达30％,远高于其他铁电光伏材料.利用传统固相法合成了KBiFe2O5材料,X-ray衍射以及选区电子衍射(SAED)表明其具有单斜晶体结构.Rietveld精修确定晶胞参数a,b,c分别为0.7899,0.5972,0.5727 nm,β值为94.484°.
Current induced magnetization switching by spin-orbit torques offers an energy-efficient means of writing information in heavy metal/ferromagnet (FM) multilayer systems. The relative contributions of
我们根据朗道-栗弗席兹-吉尔伯特(Landau-Lifshitz-Gilbert)方程，数值模拟了YIG铁磁纳米线中椭圆微波场和双频微波场驱动的畴壁运动。讨论了存在单轴各向异性情况下，畴壁运动速度和微波频率之间的关系。
Conical spin order,where a net magnetization is formed by the spin components along the conical axis,while the spiral parts induce a ferroelectric polarization in the spiral plane,possesses an inheren
Controlling the magnetism by means of electric fields is a key issue for the future development of lowpowerspintronics.Usually,electric-field can control the magnetic materials by oxide-gate structure
电流驱动的磁化翻转可在以磁矩作为信息载体的器件中扮演基本的“写”操作，从而成为自旋电子学中最有魅力的研究课题之一，受到了研究者的广泛关注。其中，一种可能的方法是利用电流通过非磁材料中的自旋轨道耦合相互作用而产生的自旋轨道耦合矩(Spin-orbit toque)作用到铁磁体磁矩上来实现。
Controlling the spin transport in solids electrically is central to the application of spintronics for the development of information technology.Since the spin-transistor was proposed by Datta and Das
Yttrium iron garnet(Y3Fe5O12 or YIG)materials have attracted a lot of attention recently in the magnetooptical recording media and microwave device industries.Because of the high resistivity,small mag