共查询到20条相似文献,搜索用时 78 毫秒
1.
本文讨论了U3的矢量相干态表示.利用K矩阵技术得到了SU3 U1 U1的正交基矢,从而确定了权的多重度. 相似文献
2.
采用磁控溅射,紫外线光刻和离子束刻蚀制备了La2/3Ca1/3MnO3/Eu2CuO4/La2/3Ca1/3MnO3磁性隧道结.通过对获得的磁性隧道结的I-V特性测量,发现非线性的I-V特性,显示结样品的隧穿特性.有趣的是发现在电极材料La2/3Ca1/3MnO3的金属-绝缘体转变温度(Tp)以下,I-V曲线出现一个跳变.随着温度降低,开始出现跳变的临界电流增大,但是跳变都发生在同样的电压下~209mV.当电流增大或减小在跳变点附近出现回滞.这一跳变只发生在铁磁金属态,表明这是一个磁性相关联的效应,可能对应一种新的磁性开关过程.虽然,目前对这一现象背后的物理机理还不清楚,但是,这一现象有可能在未来自旋电子学器件方面具有潜在的应用价值.
关键词:
庞磁电阻
磁性隧道结
开关效应 相似文献
3.
Mireya Castillo 《International Journal of Infrared and Millimeter Waves》1992,13(6):909-922
A FT-IR spectroscopic study was carried out in the region 4000–400 cm–1 for ZnSeNi and ZnSNi at room temperature. The data obtained were examined on the basis of the energy states calculations of the (3d)n configuration, based on the defect molecule approach. The present investigation reveals the transition from the ground state to the first two excited states namely3T1–3A2 and3T1–3T2 of Ni+2 (d8). 相似文献
4.
本文讨论了SO5 SU2 SU2 U1 U1及SO5 U1 U1的VCS表示.计算了SO5 U2 U2的约化矩阵元,并利用K矩阵技术确定了SO5权的多重度. 相似文献
5.
本文用X射线粉末法测定了Li2K(IO3)3与Li2NH4(IO3)3的晶体结构和原子参数。发现Li3K(IO3)3,Li2NH4(IO3)3与Li2Rb(IO3)3同晶型,属单斜晶系,空间群为P21/α,每个单胞含有四个化合式量。室温的点阵常数分别为α=11.198?,b=11.046?,c=8.254?,β=111.53°,及α=11.327?,b=11.078?,c=8.341?,β=111.87°。讨论了二元化合物的形成与离子半径的关系。
关键词: 相似文献
6.
V. N. Bocharov A. P. Burtsev E. V. Dubrovskaya T. D. Kolomiitsova D. N. Shchepkin 《Optics and Spectroscopy》2010,108(4):533-543
IR spectra of the solution of SF6 molecules in liquid NF3 at 84 K have been recorded. In a solvent transmission window of 1500–1750 cm−1, two wide absorption bands with pronounced peaks in the high-frequency part are observed. The profile of these bands is explained
by the influence of the resonance dipole-dipole (RDD) interaction of the states of the simultaneous transition ν1(SF6) + ν3(NF3) and ν2(SF6) + ν3(NF3) with the states (ν1 + ν3) and (ν2 + ν3) of the SF6 molecules, respectively. The use of three isotopic modifications 32SF6, 33SF6, and 34SF6 has allowed us to vary the resonance detuning and thus to change the strength of the RDD interaction. With the liquid near
the melting point being represented as a close-packed cubic crystal, the profile was calculated and its spectral characteristics
were determined. The frequencies of the main peaks coincide with the experimental values accurate to the error. 相似文献
7.
M. Carlotti G. di Lonardo G. Galloni A. Trombetti 《Journal of Molecular Spectroscopy》1976,62(2):192-200
The infrared absorption of HNCO has been measured in the region of the NH stretching fundamental and in that of the second overtone. The results for the excited states are (in cm?1):
Band | B | C | ||
3533.1 | 27.0 | — | — | |
10145.79 | 22.6713 | 0.368426 | 0.361722 |