区域烷炼法非对数磁驰豫考虑到有效钉扎势U(J)与临界电流密度的非线性关系,将U(J)展开为三级泰勒级数,最后推导出一个普遍适应于描述高温超导体磁驰豫的等温衰减方程,并用这一方程研究了具有高Jc,强钉扎的区域熔炼法制备YBa2Cu3O6+x的磁驰豫,而且对目前被普遍采用的几个钉扎模型进行了讨论。覃孟军樊占国物理学报...
随着x的增加出现了两种结构相变:四方相到正交相,正交(I)相到正交(Ⅱ)相的转变。这些转变有逾渗机制。辛厚文杨灵法中国科学技术大学学报辛厚文;杨灵法.YBa2Cu3O6+x高温超导体的临界温度与氧含量关系的逾渗….中国科学技术大学学报.1994.148-151
6+x (YBCO)-coated conductorwhichisproducedinthe formofawide,thintape[1-3].A majortechnicalobstacletotheir implementationinimportant powerapplicationsisthevery largelossesthatoccurintime- varyingmagneticfields[4,5].A waytoreduceaclossesistodivide ...
Recently, a negative isotope effect associated with oxygen atoms in the copper oxide planes of the crystal structure was reported 13 for highly doped YBa 2 Cu 3 O 6 + x , implying that the apical/chain oxygens make a substantial contribution to the total oxygen isotope shift. Here we ...
Submicrometer superconducting YBa2Cu3O6+x particles made by a low-temperature synthetic route. HOROWITZ et al.: " Submicrometer superconducting YBa2Cu3O6+x particles made by a low-temperature synthetic route "Horowitz,, “, H.S. (1989) ... Horowitz,S H.,McLain,... - 《Science》 被引量...
The structural ordering properties of oxygen in YBa Cu O have been studied by neutron and high-energy synchrotron X-ray diffraction and by computer simulations based on an extension of the Asymmetric Next Nearest Neighbour Interaction (ASYNNNI) model. The observed structural phases are the tetragonal...
We report a temperature-dependent increase below 300 K of diffusesuperlattice peaks corresponding to q_0 =(~2/5,0,0) in an under-dopedYBa_2Cu_3O_6+x superconductor (x~0.63). These peaks reveal strong c-axiscorrelations involving the CuO_2 bilayers, show a non-uniform increase below\\...
ases of YBa2Cu3O6+x Electrical and infrared characterization of the semiconducting phases of YBa2Cu3O6+xElectrical and infrared characterization of the semiconducting phases of YBa2Cu3O6+xExperimental/ barium compoundscrystal defectselectrical conductivity of crystalline semiconductors and insulators...
The ordering of Cu(1) O Cu(1) monomers is not found at x∼0.35. An anisotropic widening of Bragg reflections is observed in tetragonal phase near the transition to OII phase.V.PlakhtyB.KviatkovskyA.StratilatovYu.ChernenkovP.Burlet...
The effects of varying the hole concentration and the concentration of nonmagnetic (Zn) impurities on the spin excitation spectra of YBa 2 Cu 3 O 6+x are compared and contrasted. With decreasing hole concentration, the magnetic resonance peak observed below T c for x = 1 is shifted to ...