Enhanced vortex-pinning strength and magnetic-irreversibility via columnar defects in single crystal Bi2Sr2CaCu2O8

H. R. Kerchner; J. R. Thompson; Y. R. Sun; D. K. Christen; J. O. Thomson; B. C. Sales; B. Chakoumakos; L. Civale; A. D. Marwick

doi:10.1016/0921-4526(94)91451-6

Enhanced vortex-pinning strength and magnetic-irreversibility via columnar defects in single crystal Bi₂Sr₂CaCu₂O₈

H. R. Kerchner, J. R. Thompson, Y. R. Sun, D. K. Christen, J. O. Thomson, B. C. Sales, B. Chakoumakos, L. Civale, A. D. Marwick

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Abstract

To enhance vortex pinning in the high-T_c superconductor Bi₂Sr₂CaCu₂O₈, single crystals were irradiated with energetic heavy ions to create columnar defects. Irradiations were made at various angles from the c-axis. The pinning energy U₀ was investigated by ac magnetometry near B(T_irr), the limit of quasistatic magnetic irreversibility. Irradiation increased U₀ by a factor of ∼3, relatively independent of the ion-beam exposure, which increased both J_c and the irreversible BT regime. Independence of J_c and U₀ from the magnetic-field orientation suggests the predominance of strong pins interacting with 2-D pancake vortices.

Original language	English
Pages (from-to)	1903-1904
Number of pages	2
Journal	Physica B: Physics of Condensed Matter
Volume	194-196
Issue number	PART 2
DOIs	https://doi.org/10.1016/0921-4526(94)91451-6
State	Published - Feb 2 1994
Externally published	Yes

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Kerchner, H. R., Thompson, J. R., Sun, Y. R., Christen, D. K., Thomson, J. O., Sales, B. C., Chakoumakos, B., Civale, L., & Marwick, A. D. (1994). Enhanced vortex-pinning strength and magnetic-irreversibility via columnar defects in single crystal Bi₂Sr₂CaCu₂O₈. Physica B: Physics of Condensed Matter, 194-196(PART 2), 1903-1904. https://doi.org/10.1016/0921-4526(94)91451-6

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title = "Enhanced vortex-pinning strength and magnetic-irreversibility via columnar defects in single crystal Bi2Sr2CaCu2O8",

abstract = "To enhance vortex pinning in the high-Tc superconductor Bi2Sr2CaCu2O8, single crystals were irradiated with energetic heavy ions to create columnar defects. Irradiations were made at various angles from the c-axis. The pinning energy U0 was investigated by ac magnetometry near B(Tirr), the limit of quasistatic magnetic irreversibility. Irradiation increased U0 by a factor of ∼3, relatively independent of the ion-beam exposure, which increased both Jc and the irreversible BT regime. Independence of Jc and U0 from the magnetic-field orientation suggests the predominance of strong pins interacting with 2-D pancake vortices.",

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AU - Kerchner, H. R.

AU - Thompson, J. R.

AU - Sun, Y. R.

AU - Christen, D. K.

AU - Thomson, J. O.

AU - Sales, B. C.

AU - Chakoumakos, B.

AU - Civale, L.

AU - Marwick, A. D.

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AB - To enhance vortex pinning in the high-Tc superconductor Bi2Sr2CaCu2O8, single crystals were irradiated with energetic heavy ions to create columnar defects. Irradiations were made at various angles from the c-axis. The pinning energy U0 was investigated by ac magnetometry near B(Tirr), the limit of quasistatic magnetic irreversibility. Irradiation increased U0 by a factor of ∼3, relatively independent of the ion-beam exposure, which increased both Jc and the irreversible BT regime. Independence of Jc and U0 from the magnetic-field orientation suggests the predominance of strong pins interacting with 2-D pancake vortices.

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Enhanced vortex-pinning strength and magnetic-irreversibility via columnar defects in single crystal Bi₂Sr₂CaCu₂O₈

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