Persistent magnetic fields trapped in high Tc superconductor

R. Weinstein; In Gann Chen; J. Liu; D. Parks; V. Selvamanickam; K. Salama

doi:10.1063/1.103207

Persistent magnetic fields trapped in high T_c superconductor

R. Weinstein, In Gann Chen, J. Liu, D. Parks, V. Selvamanickam, K. Salama

Research output: Contribution to journal › Article › peer-review

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Abstract

A study of field trapping by the incomplete Meissner effect was performed on YBa₂Cu₃O_7-x at 77 K on both sintered and oriented grain samples. Fields of up to B_T=1280 G have been trapped in small, oriented grain, planar samples. Circulating persistent current densities of up to 4800 A/cm² are calculated. Based on these values hollow cylinders of 2 cm i.d. will trap fields of 6000 G. Initial creep is about 10%/week for both types of samples. Creep rate varies as (B_T/B _T,max)². B_T, due to an external field B ₀, is B_T∝(1-e^-cB₀/B _T,max). Lamination and mosaic assembly steps for producing practical magnets have been performed.

Original language	English
Pages (from-to)	1475-1477
Number of pages	3
Journal	Applied Physics Letters
Volume	56
Issue number	15
DOIs	https://doi.org/10.1063/1.103207
Publication status	Published - 1990

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.103207

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title = "Persistent magnetic fields trapped in high Tc superconductor",

abstract = "A study of field trapping by the incomplete Meissner effect was performed on YBa2Cu3O7-x at 77 K on both sintered and oriented grain samples. Fields of up to BT=1280 G have been trapped in small, oriented grain, planar samples. Circulating persistent current densities of up to 4800 A/cm2 are calculated. Based on these values hollow cylinders of 2 cm i.d. will trap fields of 6000 G. Initial creep is about 10%/week for both types of samples. Creep rate varies as (BT/B T,max)2. BT, due to an external field B 0, is BT∝(1-e-cB0/B T,max). Lamination and mosaic assembly steps for producing practical magnets have been performed.",

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AU - Weinstein, R.

AU - Chen, In Gann

AU - Liu, J.

AU - Parks, D.

AU - Selvamanickam, V.

AU - Salama, K.

PY - 1990

Y1 - 1990

N2 - A study of field trapping by the incomplete Meissner effect was performed on YBa2Cu3O7-x at 77 K on both sintered and oriented grain samples. Fields of up to BT=1280 G have been trapped in small, oriented grain, planar samples. Circulating persistent current densities of up to 4800 A/cm2 are calculated. Based on these values hollow cylinders of 2 cm i.d. will trap fields of 6000 G. Initial creep is about 10%/week for both types of samples. Creep rate varies as (BT/B T,max)2. BT, due to an external field B 0, is BT∝(1-e-cB0/B T,max). Lamination and mosaic assembly steps for producing practical magnets have been performed.

AB - A study of field trapping by the incomplete Meissner effect was performed on YBa2Cu3O7-x at 77 K on both sintered and oriented grain samples. Fields of up to BT=1280 G have been trapped in small, oriented grain, planar samples. Circulating persistent current densities of up to 4800 A/cm2 are calculated. Based on these values hollow cylinders of 2 cm i.d. will trap fields of 6000 G. Initial creep is about 10%/week for both types of samples. Creep rate varies as (BT/B T,max)2. BT, due to an external field B 0, is BT∝(1-e-cB0/B T,max). Lamination and mosaic assembly steps for producing practical magnets have been performed.

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Persistent magnetic fields trapped in high T_c superconductor

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