Ferromagnetic artificial pinning centers in superconducting Nb0.36Ti0.64 wires

Applied Physics Letters

Volumn 69, Issue 15, 1996, Pages 2285-2287

  Rizzo, N D ^a   Wang, J Q ^a   Prober, D E ^a   Motowidlo, L R ^b   Zeitlin, B A ^b,c  

^a YALE UNIVERSITY   (United States)

^b IGC Advanced Superconductors   (United States)

^c APD Cryogenics Inc   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

COPPER; CRITICAL CURRENT DENSITY (SUPERCONDUCTIVITY); ELECTRIC CURRENT MEASUREMENT; FERROMAGNETIC MATERIALS; MAGNETIC FIELDS; MAGNETIC RESONANCE IMAGING; MAGNETIZATION; MAGNETOMETERS; NIOBIUM ALLOYS; SUPERCONDUCTIVITY;

FERROMAGNETIC ARTIFICIAL PINNING CENTERS; NIOBIUM TITANIDE; PINNING FORCE DENSITY;

SUPERCONDUCTING WIRE;

EID: 0030573834     PISSN: 00036951     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.117535     Document Type: Article

References (17)

1. C. Meingast and D. C. Larbalestier, J. Appl. Phys. 66, 5962 (1989); C. Meingast, P. J. Lee, and D. C. Larbalestier, J. Appl. Phys. 66, 5971 (1989).
2. C. Meingast and D. C. Larbalestier, J. Appl. Phys. 66, 5962 (1989); C. Meingast, P. J. Lee, and D. C. Larbalestier, J. Appl. Phys. 66, 5971 (1989).
3. P. J. Lee, J. C. McKinnell, and D. C. Larbalestier, Adv. Cryo. Eng. (Mat.) 36, 287 (1990).
4. G. L. Dorofejev, E. Y. Klimenko, S. V. Frolov, E. V. Nikolenkov, E. I. Plashkin, N. T. Salunin, and V. Y. Filkin, in Proceedings 9th International Conference on Magnet Technology, edited by C. Marinucci and P. Weymuth (Swiss Institute for Nuclear Research, Switzerland, 1985), p. 564.
5. L. R. Motowidlo, B. A. Zeitlin, M. S. Walker, and P. Haldar, Appl. Phys. Lett. 61, 991 (1991).
6. K. Matsumoto, H. Takewaki, Y. Tanaka, O. Miura, K. Yamafuji, K. Funaki, M. Iwakuma, and T. Matsushita, Appl. Phys. Lett. 64, 115 (1994).
7. L. D. Cooley, P. J. Lee, and D. C. Larbalestier, Appl. Phys. Lett. 64, 1298 (1994).
8. R. W. Heussner, P. D. Jablonski, P. J. Lee, and D. C. Larbalestier, IEEE Trans. Appl. Supercond. 5, 1705 (1995).
9. M. K. Rudziak, J. M. Seuntjens, C. V. Renaud, T. Wong, and J. Wong, IEEE Trans. Appl. Supercond. 5, 1709 (1995).
10. P. Koorevaar, Y. Suzuki, R. Coehoorn, and J. Aarts, Phys. Rev. B 49, 441 (1994).
11. c2∼ 1 T.
12. A hexagonal stack of 61 rods has 9 rods across the point to point diameter.
13. L. D. Cooley and D. C. Larbalestier, in Proceedings 8th U.S.-Japan Workshop on High-Field Superconducting Materials, edited by K. Yamafuji and D. C. Larbalestier (Ministry of Education Science Technology, Gov. of Japan, U.S. Department of Energy, 1993), p. 92.
14. Data for typical wires, IGC-Adavanced Superconductors, 1875 Thomaston Ave., Waterbury, CT 06704.
15. 3. Cu is an even weaker pin than Ti. See Refs. 2 and 4.
16. The elastic energy cost of vortices bunching up on the pins with spacing less than the equilibrium lattice spacing is much greater than the pinning energy gained with such bunching. We conclude that the vortices will have access to fewer pins as the field is increased. See, e.g., E. H. Brandt, Phys. Rev. B 34, 6514 (1986).
17. p∝b(1-b). 17 We do not expect this form to hold for wires B and D, which also have interface pinning.