Magnetron sputtering of Superconducting Multilayer Nb3Sn Thin Film

More documents

Recommendations

Info

1008038.5°{110}69.6°{211}sample1sample2sample3elative intensity60402055.5°{200}82.5°{220}95.1°{310}121.7°{321}040 50 60 70 80 90 100 110 120 130 140Angle[degree]Fig. 2.42 the XRD result of Run 7According to the result of the XRD experiment from Fig. 2.36 to Fig. 2.42, thereare some abnormal peaks, such as {211} of sample2 of run3, {211} of sample3 ofrun2. All of the marked peaks are the crystal plane of the Nb. The unmarked peaks ofRun 3 sample 1 may be that of Oxygen element, the unmarked peaks of Run 7 sample1 may be that of NbO, and the unmarked peaks of Run 5 sample 2 may be that ofNbO and Oxygen, which should be investigated in the next step.Fig.2.43 The mirror reflection of the photonThe peaks of the figures of the XRD results are formed by the crystal, which canbe explained by W. H. Bragg as shown in the Fig.2.43. If we regard the crystal planesas mirrors, constructive interference is observed when the path difference between thetwo reflected beams is nλ. The path difference of the photon action on the adjacentcrystal plane is:38
2dsinθ= nλ (2.3)Fig.2.44 the different distance of the different crystal planeWhere d is the interplanar spacing. However, the distance is different with thedifferent crystal plane as shown in Fig.2.44. For the cubic crystal, there is arelationship:d12( h,k,l)222( h + k + l )= (2.4)2aWhere, h,k,l stand for the direction of the crystal plane, a is the cubic edge length.And then we have:24sin ( θ )=2 2n λ( h2+ ka22+ l2)(2.5)According to the Eq.(2.4), Eq.(2.5) and the XRD results from Fig.2.35 toFig.2.42, we can obtain the d-space of {110} crystal plane, and then the cubic edgelength can be obtained of each sample as shown in Table2.3.Table2.3 the cubic edge length of each sampleThe relationship between the cubic edge length and sputtering current is shownin Fig.2.45, where the black point means that the pressure of proceeding gas is39
Page 1: UNIVERSITÀ DEGLISTUDI DI PADOVAFac
Page 7 and 8: IndexINDEX ........................
Page 9 and 10: IntroductionThe superconductor acce
Page 11 and 12: Fig. 1.1 Disc-loaded traveling-wave
Page 13 and 14: In Type-II superconductors, vortex
Page 15 and 16: needed for preventing the supercond
Page 17 and 18: The B1 crystal structure has a cubi
Page 19 and 20: NbN cavities literature, is often h
Page 21 and 22: superconducting magnet construction
Page 23 and 24: 775°C. From the same diagram, it i
Page 25 and 26: two types of electrons at the Fermi
Page 27 and 28: Of course, there are some other kin
Page 29 and 30: as shown in Fig.2.3. The four opera
Page 31 and 32: Fig.2.8 turbomolecular pumpFig. 2.9
Page 33 and 34: Fig. 2.14 The chamber covered with
Page 35 and 36: Fig. 2.17 the gasket and the magnet
Page 37 and 38: shown in Fig. 2.21 and Fig. 2.22. T
Page 39 and 40: Fig. 2.26 The interface of the surf
Page 41 and 42: Fig. 2.30 put the sample into the T
Page 43 and 44: Fig. 2.34 the performance of the th
Page 45: 1008038.5°{110}69.6°{211}sample1s
Page 49 and 50: Chapter 3 Multilayer deposition of
Page 51 and 52: 1 minute. The time of depositing mu
Page 53 and 54: chamber 1 and is connected to the s
Page 55 and 56: 3.2.2.2 Analysis resultⅠ The thic
Page 57 and 58: In order to detect the component of
Page 59 and 60: measure the RRR. So the resistance
Page 61 and 62: 110100903480relative Intensity70605
Page 63 and 64: frequency of the cavity which is in
Page 65 and 66: Fig. 3.28 the inductor coilDuring t
Page 67 and 68: Fig. 3.32 fixing the sample with Nb
Page 69 and 70: second transition temperature is th
Page 71 and 72: source is the bulk Nb sample. Altho
Page 73 and 74: of 1A in the Fig. 3.37 and Fig. 3.4
Page 75 and 76: Table 3.10 the description of the p
Page 77 and 78: 1101001.0A10'-IND3 45 6 7 9 1011 12
Page 79 and 80: 1101009080341.8A10'INDrelative inte
Page 81 and 82: Reference1. A. Godeke, Nb3Sn FOR RA

Magnetron sputtering of Superconducting Multilayer Nb3Sn Thin Film

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?