-
In order to further improve the superconducting current carrying capacity of REBCO coated conductor under strong magnetic field, ion irradiation is used to generate the pinning center of introduced magnetic flux in the REBCO coated conductor. In this paper, the H-ion irradiation of REBCO second generation high temperature superconductor strip was carried out by using the 320kV high charge state ion synthesis research platform. DB-SPBA combined with Raman spectroscopy was used to measure the change of microstructure in YBCO samples irradiated by H+ions within the range of 5.0×1014~1.0×1016. The positron annihilation parameters in YBCO before and after irradiation were analyzed. It is found that after 100 keV H+ion irradiation, a large number of defects including vacancy, vacancy group or dislocation group are produced in the superconducting layer. The larger the irradiation dose, the more vacancy type defects are produced, the more complex the defect types are, and the annihilation mechanism of positrons in the defects changes. Raman spectroscopy results show that with the increase of H+ion irradiation dose, the oxygen atoms in the coating rearrange, the plane spacing increases, the orthogonal phase structure of the coating is destroyed, and the degree of order decreases. The defects produced by such ion irradiation lay a foundation for the introduction of flux pinning centers. Further research can be carried out in combination with X-ray diffractometer, transmission electron microscope, superconductivity and other testing methods to provide theoretical and practical reference for the optimization of material properties.
-
Keywords:
- 2G-HTS /
- Ion irradiation /
- Positron annihilation /
- Holes
-
[1] W. J. De Haas,H. Bremmer. 1936Physica.3687
[2] H. A. Boorse, H. 1935Nature. 135827
[3] Qu C F. 1982Rare Met. Mater. Eng...02104(in Chinese)[屈翠芬. 1982稀有金属材料与工程.02104]
[4] S.I.Bondarenko, V.P.Koverya, A.V.Krevsun, S.I.Link 2017Low Temp. Phys.. 43 1125
[5] Cai C B,Chi C X,Li M J 2019Sci. Bull.. 64 827(in Chinese)[池长鑫,李敏娟蔡传兵,池长鑫,李敏娟2019科学通报64827]
[6] Ke Wang,Qiang Hou, Arnab Pal 2021J.Supercond.Novel Magn.. 34 1379
[7] Cai C B,Liu Z Y,Lu Y M 2011Materials China. 30 1(in Chinese)[蔡传兵,刘志勇,鲁玉明2011中国材料进展30 1]
[8] Dadras, S.,Falahati, S.,Dehghani 2018Physica C.548 65
[9] Palau A, Valles F, Rouco V 2018Supercond. Sci. Technol..31 034004
[10] CL Johnson, JK Bording, Y Zhu 2008Phys. Rev. B.1 775
[11] Liu J H,Cheng J H,Wang Q L 2017Adv.Technol.Electral.Eng Energ.36:1(in Chinese)[刘建华,程军胜,王秋良2017电工电能新技术36 1]
[12] Foltyn S R, Civale L, Macmanusdriscoll J L 2007Nat. Mater..6 631
[13] Wang Y,Suo H L,Mao L 2019J.Inorg.Mater. 10 1055(in Chinese)[王雅,索红莉,毛磊2019无机材料学报10 1055]
[14] Senatore C, Alessandrini M, Lucarelli A 2014Supercond. Sci. Technol.. 27 103001
[15] Ramachandran R, David C, Magudapathy P, Rajaraman R 2019Fusion Eng. Des..12 2415
[16] Zibrov M, Egger W, Heikinheimo J 2020J.Nucl.Mater. 531 152017
[17] Thomas J, Bastasz R 1981 J. Appl. Phys. 52 6426
[18] Wilson.W.D, Bisson.C.L, Baskes.M.I 1981Phys. Rev. B.24 5616
[19] Staikov P, Djourelov N 2013Physica. B 413 59
[20] Puska M J, Lanki P, Nieminen R M 1989J. Phys. Condens. Matter 1 6081
[21] He W D,Zhang P Y,Liu X 2021Acta Phys. 70 167803(in Chinese)[贺玮迪,张培源,刘翔2021 70 167803]
[22] Wang S J,Chen Z Q,Wang B, Wu Y C,Fang P F,Zhang Y X 2008Appl. Spectrosc.(Wuhan:Hubei Science and Technology Press) p57(in Chinese)[王少阶,陈志权,王波,吴奕初,方鹏飞,张永学著2008应用正电子谱学(武汉:湖北科学技术出版社)第57页]
[23] Ramachandran R,David C,Magudapathy P,Rajaraman R,Govindaraj R,Amarendra G 2019Fusion Eng. Des. 142 55
Metrics
- Abstract views: 2080
- PDF Downloads: 9
- Cited By: 0
下载:
