Abstract
A sintered bulk sample of YBa2Cu3O7 has been investigated resistively and inductively with respect to its resistivity ϱ(B, T), upper critical fieldB c2 (T), and current carrying capabilityj c (B, T). The inductive measurements were repeated after powdering the sample to a maximum particle size of 60 μm. Results show that the intrinsic-intragrain properties as approximately revealed by the powder measurements, are severely masked in bulk measurements by the intergrain weak-link structure. As an example, the current densityj c (≃0 T, 4.2 K) in the powdered YBa2Cu3O7 has a value of 4·106 A/cm2, which is about three orders of magnitude higher than in the bulk material. The high values of the intragrainj c are probably due to pinning at twin boundaries. — Besidesj c the normal state resistivity just aboveT c , ρ n , is influenced by the interconnecting structure, both properties being directly related: a smaller ρ n leads to a higherj c in bulk samples. — The upper critical field shows a pronounced anisotropyB c2 |/B c2 ⊥ of about 20 to 30, whereB c2 |=330 T is the extrapolated upper critical field at zero temperature for the field orientation parallel to the (Cu−O)-planes. — For the time being, theB c2 anisotropy and the weak-link structure of sintered bulk samples are the main obstacles for high field applications.
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Bednorz, J.G., Müller, K.A.: Z. Phys. B — Condensed Matter64, 189 (1986)
Wu, M.K., Ashburn, J.R., Torng, C.J., Hor, P.H., Meng, R.L., Gao, L., Huang, Z.J., Wang, Y.Q., Chu, C.W.: Phys. Rev. Lett.58, 908 (1987)
Orlando, T.P., Delin, K.A., Foner, S., McNiff, Jr., E.J., Tarascon, J.M., Greene, L.H., McKinnon, W.R., Hull, G.W.: Phys. Rev. B35, 7249 (1987)
Chaudhary, P., Koch, R.H., Laibowitz, R.B., McGuire, T.R., Gambino, R.J.: Phys. Rev. Lett.58, 2684 (1987)
Cava, R.J., Batlogg, B., van Dover, R.B., Murphy, D.W., Sunshine, S., Siegrist, T., Remeika, J.P., Rietman, E.A., Zahurak, S., Espinosa, G.P.: Phys. Rev. Lett.58, 1676 (1987)
Larbalestier, D.C., Daeumling, M., Cai, X., Seuntjens, J., McKinnell, J., Hampshire, D., Lee, P., Meingast, C., Willis, T., Muller, H., Ray, R.D., Dillenburg, R.G., Hellstrom, E.E., Joynt, R.: J. Appl. Phys. (submitted for publication)
Wühl, H., Apfelstedt, I., Dietrich, M., Ecke, J., Fietz, W.H., Fink, J., Flükiger, R., Gering, E., Gompf, F., Küpfer, H., Nücker, N., Obst, B., Politis, C., Reichardt, W., Renker, B., Rietschel, H., Schauer, W., Weiss, F.: Proceedings of Symposium S, 1987 Spring Meeting of Material Research Society, Anaheim, CA
Ghosh, A.K., Suenga, M., Asano, T., Moodenbaugh, A.R., Sabatini, R.L.: presented at ICMC, 1987
Funaki, K., Iwakuma, M., Sudo, Y., Ni, B., Kisu, T., Matsushita, T., Takeo, M., Yamafuji, K.: Jpn. J. Appl. Phys.26, L1445 (1987)
Apfelstedt, I., Flükiger, R., Küpfer, H., Meier-Hirmer, R., Obst, B., Politis, C., Schauer, W., Weiss, F., Wühl, H.: Proceedings LT18, p. 1181, Kyoto 1987
Campbell, A.M., Hibbs, A.D., Ashby, M.F., Edwards, P.P., Jones, R., Evetts, J.E., Glowacki, B.: Proceedings of Europ. Workshop on High Critical Temperature Superconductors and Potential Applications, p. 91, Genova: Commission of the European Communities (ed.), 1987
Hidaka, Y., Enomoto, Y., Suzuki, M., Oda, M., Murakami, T.: Jpn. J. Appl. Phys.26, L377 (1987)
Noel, H., Padiou, J., Levet, J.C., Gaugeon, P., Potel, M., Laborde, O., Monceau, P.: Solid State Commun.63, 915 (1987)
Dinger, T.R., Worthington, T.K., Gallagher, W.J., Sandstrom, R.L.: Phys. Rev. Lett.58, 2687 (1987)
Hidaka, Y., Enomoto, Y., Suzuki, M., Oda, M., Katsui, A., Murakami, T.: Jpn. J. Appl. Phys.26, L726 (1987)
Iye, Y., Tamegai, T., Takeya, H., Takei, H.: Jpn. J. Appl. Phys.26, L1057 (1987)
LePage, Y., McKinnon, W.R., Tarascon, J.M., Greene, L.H., Hull, G.W., Hwang, D.M.: Phys. Rev. B35, 7245 (1987)
Flükiger, R., Weiß, F., Müller, T., Goldacker, W., Wolf, T., Seibt, E., Küpfer, H., Apfelstedt, I., Schauer, W.: Z. Phys. B — Condensed Matter (submitted for publication)
Goldfarb, R.B., Clark, A.F., Braginski, A.I., Panson, A.J.: Cryogenics27, 475 (1987)
Rollins, R.W., Küpfer, H., Gey, W.: J. Appl. Phys.45, 5392 (1974)
Braginski, A.I.: Proceedings of the International Workshop on Novel Mechanisms of Superconductivity. V. Kresin, S.A. Wolf (eds.). New York: Plenum Press 1987
Campbell, A.M.: J. Phys. C2, 1492 (1969)
Prober, D.E., Schwall, R.E., Beasley, M.R.: Phys. Rev. B21, 2717 (1980)
Enomoto, Y., Murakami, T., Suzuki, M., Moriwaki, K.: Jpn. J. Appl. Phys.26, L1248 (1987)
Clem, J.R., Kogan, V.G.: Proceedings LT18, p. 1161, Kyoto 1987
Schauer, W., Küpfer, H., Flükiger, R., Apfelstedt, I., Meier-Hirmer, R., Wühl, H.: Proceedings of European Workshop on High Critical Temperature Superconductors and Potential Applications, p. 393, Genova: Commission of the European Communities (ed.), 1987
Matsushita, T., Iwakuma, M., Sudo, Y., Ni, B., Kisu, T., Funaki, K., Takeo, M., Yamafuji, K.: (Preprint)
Roth, G., Ewert, D., Heger, G., Hervieu, M. Michel, C., Raveau, B., D'Yvoire, F., Revcolevschi, A.: (Preprint)
Renker, B., Apfelstedt, I., Küpfer, H., Politis, C., Rietschel, H., Schauer, W., Wühl, H., Gottwick, U., Kneissel, H., Rauchschwalbe, U., Spille, H., Steglich, F.: Z. Phys. B — Condensed Matter67, 1 (1987)
Küpfer, H., Apfelstedt, I., Schauer, W., Flükiger, R., Meier-Hirmer, R., Wühl, H., Scheurer, H.: Z. Phys. B — Condensed Matter69, 167 (1987)
Welch, D.O., Suenaga, M., Asano, T.: Phys. Rev. B36, 2390 (1987)
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Küpfer, H., Apfelstedt, I., Schauer, W. et al. Critical current and upper critical field of sintered and powdered superconducting YBa2Cu3O7 . Z. Physik B - Condensed Matter 69, 159–166 (1987). https://doi.org/10.1007/BF01307271
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DOI: https://doi.org/10.1007/BF01307271