Abstract
The role of the demagnetizing fields of crystallites in HTSC samples is studied. An increase in the crystallite size is shown to suppress the intra-and intercrystalline critical currents of the sample in lower fields. The demagnetizing fields of crystallites are shown to be one of the main causes of the fact that the Bean model is invalid for HTSC samples. A method is proposed to measure the thermodynamic field of a superconductor; this method allows the first thermodynamic critical magnetic fields of the sample and its crystallites and “subcrystallites” to be measured with a high accuracy. The first thermodynamic critical magnetic fields are used to estimate the critical current density J c of the sample, crystallites, and subcrystallites.
Similar content being viewed by others
References
Physical Properties of High-Temperature Superconductors Ed. by D. M. Ginsberg (World Scientific, Singapore, 1990; Mir, Moscow, 1990).
V. V. Schmidt, The Physics of Superconductors: Introduction to Fundamentals and Applications (Springer, Berlin, 1997; MTsNMO, Moscow, 2000).
V. M. Pan, Fiz. Nizk. Temp. (Kharkov) 32(8), 1039 (2006) [Low Temp. Phys. 32 (8), 783 (2006)].
A. S. Mel’nikov, Yu. N. Nozdrin, I. D. Tokman, et al., Phys. Rev. B: Condens. Matter 58, 11672 (1998).
M. W. Rupich, U. Schoop, D. T. Verebelyi, et al., IEEE Trans. Appl. Supercond. 13, 2458 (2003).
M. S. Hatzistergos, H. Efstathiadis, E. Lifshin, et al., IEEE Trans. Appl. Supercond. 13, 2470 (2003).
A. A. Zhukov and V. V. Moshchalkov, Sverkhprovodimost: Fiz., Khim., Tekh. 4, 850 (1991).
Kh. R. Rostami, in Program and Abstracts of Papers of the 20th International Conference on Magnet Technology (MT 20), Philadelphia, PA, United States, August 27–31, 2000 (Philadelphia, 2000), No. 5105.
Kh. R. Rostami, in Program and Abstracts of Papers of the 20th International Symposium on Superconductivity (ISS), Tsukuba, Japan, November 5–7, 2007 (Tsukuba, 2007), PCP-46, p. 77.
E. B. Sonin, Pis’ma Zh. Éksp. Teor. Fiz. 47(8), 415 (1988) [JETP Lett. 47 (8), 496 (1988)].
V. R. Karasik, N. G. Vasil’ev, and V. G. Ershov, Zh. Éksp. Teor. Fiz. 59, 790 (1970) [Sov. Phys. JETP 32 433 (1970)].
V. V. Moshchalkov, A. A. Zhukov, L. I. Leonyuk, et al., Sverkhprovodimost: Fiz., Khim., Tekh. 2(12), 84 (1989).
V. S. Gorbachev and S. E. Savel’ev, Zh. Éksp. Teor. Fiz. 109(4), 1387 (1996) [JETP 82 (4), 748 (1996)].
V. M. Krasnov, V. A. Larkin, and V. V. Ryazanov, Physica C (Amsterdam) 174, 440 (1991).
Kh. R. Rostami, in Proceedings of the Conference on the Physics of Condensed Matter, Superconductivity, and Materials Science, Kurchatov Institute “Russian Research Center,” Moscow, Russia, November 26–30, 2007 (Moscow, 2007), p. 218.
A. A. Abrikosov, Fundamentals of the Theory of Metals (Nauka, Moscow, 1987; North-Holland, Amsterdam, 1988).
L. D. Landau and E. M. Lifshitz, Course of Theoretical Physics, Vol. 8: Electrodynamics of Continuous Media (Nauka, Moscow, 1992; Butterworth-Heinemann, Oxford, 1993).
P. de Genes, Superconductivity of Metals and Alloys (Benjamin, New York, 1966; Mir, Moscow, 1968).
A. N. Artemov, Pis’ma Zh. Éksp. Teor. Fiz. 68(6), 460 (1998) [JETP Lett. 68 (6), 492 (1998)].
Kh. R. Rostami, Zh. Éksp. Teor. Fiz. 128(4), 760 (2005) [JETP 101 (4), 653 (2005)].
C. P. Bean and J. D. Livingston, Phys. Rev. Lett. 12, 14(1964).
Kh. R. Rostami, Prib. Tekh. Éksp., No. 6, 95 (2004) [Instrum. Exp. Tech. 47 (6), 809 (2004)].
V. N. Gubankov and Kh. R. Rostami, Fiz. Tverd. Tela (St. Petersburg) 43(7), 1168 (2001) [Phys. Solid State 43 (7), 1210 (2001)].
Cao Xiaowen, Han Guchang, and Zhang Tingyu, Mod. Phys. Lett. B 1, 383 (1988).
H. Dersch and G. Blatter, Phys. Rev. B: Condens. Matter 38, 11391 (1988).
A. V. Bezryadin, V. N. Kopylov, V. M. Krasnov, et al., Pis’ma Zh. Éksp. Teor. Fiz. 51(3), 147 (1990) [JETP Lett. 51 (3), 167 (1990)].
Chemistry of High-Temperature Superconductors, Ed. by D. Nelson, M. Whittingham, and T. George (American Chemical Society, Washington, DC, United States, 1987; Mir, Moscow, 1988), Chap. 28.
Kh. R. Rostami, in Program and Abstracts of Papers of the 25th International Conference on Low-Temperature Physics (LT 25), Leiden, The Netherlands, August 6–13, 2008 (Leiden, 2008), B1LT1286.
A. S. Krasil’nikov, L. G. Mamsurova, K. K. Pukhov, et al., Zh. Éksp. Teor. Fiz. 109(3), 1006 (1996) [JETP 82 (3), 542 (1996)].
C. P. Bean, Rev. Mod. Phys. 36, 31 (1964).
S. Senoussi, G. Aguillon, and S. Hadjoudj, Physica C (Amsterdam) 175, 215 (1991).
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © Kh.R. Rostami, 2008, published in Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2008, Vol. 134, No. 4, pp. 716–745.
Rights and permissions
About this article
Cite this article
Rostami, K.R. Demagnetizing fields of crystallites and a method for measuring the thermodynamic fields of quasi-single-crystal and polycrystalline thin YBa2Cu3O7 − x disks. J. Exp. Theor. Phys. 107, 612–619 (2008). https://doi.org/10.1134/S1063776108100087
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1063776108100087