Where to get ybco

One of the without any evidence of comparable enhancement in the novelties of the approach used in this adaptation of Raman Raman scattering features, i. Several likely as the monochromator. However, it is important surface and collects the Raman scattered radiation from the to note that the aberrant spectral effects observed with the YBCO film, an average Raman spectrum is collected for a fixed length of tape. The spectrometer was set for a data acquisition period of 5 seconds in intervals of 1 minute.

Thus, each of the stored, moving tape spectra constitutes an average spectrum of an approximately 1. This intermittent sampling was done to limit the data files for the long lengths of tape that were examined during method development and testing. The focal length of the collection optic at the tip of the probe is 11 mm and no attempt has yet been made to maintain a specific focus level on moving tape segments.

Nonetheless, the spectral quality and reproducibility achieved thus far have been of sufficiently high quality to provide useful information. The vast majority of spectra exhibit the same peak and baseline count levels and the same overall spectral features, but on occasion random aberrant spectra are recorded.

The top trace shows the aberrant spectrum described in the text. The Figure 2 shows ten spectra from a set of eleven consecutive bottom trace is the average spectrum in Fig. KOSI spectrometer, on-line fiber-optic probe, and nm excitation laser are not experienced when the same samples are examined using the Renishaw RM with nm baseline-corrected spectrum of good quality MOCVD product excitation. YBCO is shown as Fig.

The spectrum. The stitch step has turned out to be a useful artifact nm excited Raman spectrum of a similarly doped, pulsed- for baseline correction, as described below.

Figure 4b was textured, tetragonal YBCO using nm excitation. Figure 5c obtained by the following subtractive procedure: The count is a nm excited Raman spectrum of the same PLD film. After such treatment, the count the two different excitation wavelengths indicates that the ranges and spectral features of the two spectra in Fig.

It is worthy The spectra in Figs. We step is typically well over an order of magnitude. Note that the spectrum scattering is not increased by the scattering process that causes shown in Fig.

After the the background photon burst in aberrant spectra. If it were, one MOCVD step, the tape is coated with a silver cap layer and would expect the result of the downscaling and subtraction subjected to an oxygen annealing treatment to transform the procedure that gave Fig. A typical Raman spectrum of the compared to the normal scans. In particular, the features filled in with cross-hatching in the characteristic phonons of YBCO and common impurity Fig. These phases e. It happens that the nm 1.

Figure 1 of the has domains of tilted YBCO grains, a condition that tends to paper by Blumberg et al. The spacing between the cross-hatched bands in the This knowledge of the effect of orientation and oxygen bottom spectrum of Fig.

Because the tape is in tension during reel-to-reel YBCO c axis perpendicular to the tape surface. When the MOCVD, vertical displacements of the tape perpendicular to excitation laser is also introduced perpendicular to the tape the tape length direction tend to be small.

Nonetheless, a focal surface, as in this study, three of the five Raman active c-axis point variation study was performed to determine the phonons of O-YBCO typically appear with moderate intensi- consequences of tape motion along the axis of the collection ty. The in-phase centro-symmetric each spectrum in Fig.

Spectrum 8 is linear scale for each spectrum taken during each pass is representative in appearance of spectra 1 through 8; and presented in Fig. Here, the graphs for each pass are stacked spectrum 12 is representative in appearance of spectra 12 one above the other to allow a comparison of the number and through At setting 10 and at the two adjacent settings one pass-to-pass location of photon bursts. Examination of these focused 60 lm above the YBCO surface and the other 60 lm graphs shows that the pattern of bursts is random.

A plot of the below the YBCO surface , the PCV is much higher than for integrated counts logarithmic scale for each spectrum taken subsequent spectra in either direction away from the focal during each of the three passes over an approximately two- setting, and the spectrum shows evidence of a background meter length of a meter long tape is shown in Fig.

In this photon burst similar to that exhibited by the aberrant spectrum plot we observe again that the photon bursts are random i. The count values that are marked with arrows in Fig. The dips results in this inset suggest that the background photon bursts seem to be in positional registry for pass 2 and pass 3 but not so are caused or perhaps exacerbated by having the excitation for pass 1, although the spacing of the dips appears to be the laser focused on the YBCO surface.

This is not surprising same for all three passes. The cause of YBCO surface maximizes the reflected laser photon flux the dips is still under investigation, but it is believed to be collected by the probe lens. Similar focusing tests done using a related to a process parameter fluctuation. There is a south pole induced in the superconductor directly below the south pole of the levitating magnet.

This mirror image moves with the magnet as the magnet is moves, so that the disk magnet can be given a rapid spin without affecting its levitation.

In fact the magnet may continue to spin for quite a long time because its spinning encounters no friction other than the friction of air resistance.

Click here to see the original version. We have republished this article back in because it was an interesting thing to have on our site. Many good pages like the one we republished go down and mirroring the article felt the right thing to do at the time.

You say you add the yttrium oxide, barium carbonate and cuprix oxide in the ratio of , but the weights of the materials do not reflect this. Could you please explain it a little bit more please. The mass ratios generally do not match up to atomic ratios because each atom has a different mass. The refers to the compound YBa2Cu3O 7-x that is being made the x accounts for the fact that the exact oxygen content is uncertain. Well done!

Simply splendid! Any thoughts or suggestions would be highly appreciated. I am very seriously condiering 10X the values of the mixture for a more usable set of flux return plates.

But that is another project. One disc with strategically placed gaps to provide for a permanent magnet oscillator. Nifty huh? Okay have fun and keep up the good work! Save my name, email, and website in this browser for the next time I comment. This site uses Akismet to reduce spam. Learn how your comment data is processed. Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website.

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