【摘 要】
:
Epitaxial films of Ga1-xMnxN have been grown on c-sapphire substrates by low-pressure metal-organic vapour phase epitaxy. The samples show ferromagnetic behavio
【机 构】
:
School of Physics, Materials Physics Laboratory, Peking University, Beijing 100871“,”Research Center
论文部分内容阅读
Epitaxial films of Ga1-xMnxN have been grown on c-sapphire substrates by low-pressure metal-organic vapour phase epitaxy. The samples show ferromagnetic behaviour up to a temperature of T = 380 K with hysteresis curves showing a coercivity of 50-100Oe. No ferromagnetic second phases and no significant deterioration in crystal quality with the incorporation of Mn can be detected by high-resolution x-ray diffraction. The result of x-ray absorption near-edge structures indicates that Mn atoms substitute for Ga atoms. The Mn concentrations of the layers are determined to reach x = 0.038 by proton-induced x-ray emission.
其他文献
那年五一节前,学校前面的果树园一片翠绿,栗子树也结成一片片细长的花瓣儿。走在树下,我高兴得合不拢嘴,因为我荣幸地成为班上为数不多的入团先进分子。当班主任念出我的名字时,我竟高兴得高呼起来,甚至把同桌吓了一跳!那时在乡下,入团可不是一件容易的事。爸爸是个老实人,没有文化,不是在田里,就是在菜地。当听到儿子要入团时,爸爸居然用惊讶的眼光看着我,半晌才说:“儿子,行啊!你爸现在啥都不是,看现在当个村干部
随着电视技术的发展以及电视节目种类的增多,电视新闻评论节目的处境愈来愈严峻,再加上一些新闻评论主持人或评论员在对新闻热点进行分析解说时,语言逻辑混乱,观点模棱两可,
微博现在是互联网的新宠儿,也是在如今网络时代中的一个与众不同的社会网络,人们青睐微博的原因在于可以随时随地的更新微博展开互动。微薄不同于其它社交软件的特点在于其简
Unlike usual celestial gravitational waves, the relic gravitational waves (RGWs) form random signals in curved spacetime background. We calculate the energy-mom
The two-phase behaviour in financial markets actually means the bifurcation phenomenon, which represents the change of the conditional probability from an unimo
“壮苗先壮根,发苗先发根,根粗苗壮才早发”,这是棉花主要生长特性之一。地膜棉较露地棉出苗早,生长快,长势旺,结铃多,产量高。但其根系生长有什么特性?针对这个问题,1983~19
Undoped and copper doped zinc oxide (ZnO) thin films have been prepared on glass substrates by spray pyrolysis technique. The films were doped with copper using
The lattice parameters of AlB2, MgB2 and TiB2 under pressures are determined with a high-energy synchrotron source in a diamond anvil cell. The experimental res
随着各种肥料在油菜上施用量的增多,特别是氮素,磷素肥料施用量的增加,促进了油菜产量的逐年增长,从而引起甘蓝型油莱对微量元素硼的缺乏,导致油菜“花而不实”的生理性病害
又是一个没有老师监堂的自习课,多么幸福啊。班里的同学正在热火朝天的谈天说地。笑笑扭着脑袋和身后的小明聊得正欢:“小明小明,你知道吗?上节课我终于明白啊(a)啵(b)呲(c)嘚(d)是怎么回事儿了,这点东西困扰了我十来年。”突然,笑笑猛地将身子转了回去,而原本喧闹的教室也变得鸦雀无声。大概沉默了十秒,并没有什么异样,小明想到笑笑刚才紧张的样子,突然哈哈大笑。教室里又继续沸腾起来。 在我们的生活中,