نتایج جستجو برای: ybco
تعداد نتایج: 1137 فیلتر نتایج به سال:
We observe magnetic #ux penetration into YBCO thin "lm strips under magnetic "elds less than 1 mT or in the remanent state. The THz radiation images are qualitatively transferred into the magnetic "eld distribution images. ( 2000 Elsevier Science B.V. All rights reserved.
Intense experimental and theoretical efforts have recently been brought to bear on the determination of the symmetry of superconducting order parameter in high Tc Cuprates as this would shed light on the nature of microscopic interactions that are responsible for superconductivity in these unusual systems. We use a two band model that reproduces the Fermi surface seen in ARPES experiments of Sh...
This paper describes the NMR/MRI magnets that are currently being developed at the MIT Francis Bitter Magnet Laboratory: 1) a 1.3 GHz NMR magnet; 2) a compact NMR magnet assembled from YBCO annuli; and 3) a persistent-mode, fully-protected 0.5-T/800-mm whole-body MRI magnet.
We consider both analytically and numerically the effect of inhomogeneity of Josephson properties of grain boundaries in YBCO thin films on unquantized (splinter) vortices. It is shown that in general a smooth inhomogeneity breaks the complementarity condition /1 þ /2 1⁄4 /0 relating magnetic fluxes /1 and /2 carried by adjacent splinter vortices. 2003 Elsevier B.V. All rights reserved. PACS: 7...
This study presents NMR signal detection by means of a superconducting channel consisting of a Nb surface detection coil inductively coupled to a YBCO mixed sensor. The NMR system operates at a low-field (8.9mT) in a magnetically shielded room suitable for magnetoencephalographic (MEG) recordings. The main field is generated by a compact solenoid and the geometry of the pick-up coil has been op...
In this paper we classify the allowed order parameter symmetries in multilayer cuprates and discuss their physical consequences, with emphasis on Josephson tunneling and impurity scattering. Our solutions to the gap equation are based on highly non-specific forms for the interand intra-plane pairing interactions in order to arrive at the most general conclusions. Within this framework, the bi-l...
در این پایان نامه خواص ساختاری نظم یابی اکسیژن در yba2cu3o6+x ( ) بوسیله شبیه سازی مونت کارلو با استفاده از روش asynnni مورد بررسی قرار گرفته است. در ایت شبیه سازی، فرآیند مرتب سازی اکسیژن در ybco، بر پایه مدل آیزینگ دو بعدی می باشد. همجنین تاثیر پتانسیل شیمیایی روی بخش اکسیژن در داخل صفحات لایه ای cu-o ابررسانای ybco نیز مطالعه شده است. برای مجموعه خاصی از پتانسیل های بر همکنش تمودارهای، متوس...
YBa2Cu3O7-x (YBCO) is a kind of high-temperature superconducting material that has important application in information, energy, medical treatment, etc., and the properties YBCO are closely related to its internal microstructure. In this study, microwave heating method was adopted prepare materials. The 3D online evolution observation based on synchrotron radiation computed tomography technolog...
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