Magnetostriction and thermal expansion of high temperature superconductors

Schmidt, Axel; Stellmach, F.; Ewert, S.

doi:10.1016/0921-4526(94)91393-5

Cited by 10 publications

(2 citation statements)

References 5 publications

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“…One such effect is a slow relaxation [62] of the magnetostriction with time after a field sweep is suddenly stopped. This behaviour has been reported by several authors [63][64][65][66], where in most cases the observed relaxation is monotonous, close to a logarithmic decay with time. However, in a study of the relaxation in a (La 1−x Sr x ) 2 CuO 4 (x = 0.07) single crystal at 5 K an unusual non-monotonous behaviour was found along the increasing-field branch [67].…”

Section: Pinning-induced Magnetostrictionsupporting

confidence: 85%

Flux-pinning-induced stress and magnetostriction in bulk superconductors

Johansen¹

2000

Supercond. Sci. Technol.

137

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The development of bulk high-temperature superconductors (HTSs) and their applications has today come to a point where the mechanical response to high magnetic fields may be more important than their critical-current density and large-grain property. Reviewed in this article are the recent studies of the magneto-elastic effects which are caused by flux pinning in the superconductors. This includes the work on the giant irreversible magnetostriction and internal stress, which often cause fatal cracking of the HTS bulks as they become magnetized. The cracking is a problem that today accompanies the quest for the highest trapped field values, and the latest development in this area is also presented. While the first part is an overview of experimental efforts, the second summarizes the work done to model the pinning-induced stress and strain under various magnetic and geometrical conditions.

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Section: Pinning-induced Magnetostrictionsupporting

confidence: 85%

Flux-pinning-induced stress and magnetostriction in bulk superconductors

Johansen¹

2000

Supercond. Sci. Technol.

137

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“…Measurements of the irreversible «giant» magnetostriction in HTSC [1][2][3][4] appears to be an effective tool for examination of the pinning-related phenomena in hard superconductors. The 1D case was considered in detail for a thin long strip in a longitudinal magnetic field [5], and good agreement was achieved with the conventional models [6][7][8][9] of the magnetic flux distributions in type-II superconductors.…”

Section: Introductionmentioning

confidence: 99%

Investigation of magnetic flux gradients in hard superconductors

Bruk

Eremenko

Makedonskaya

et al. 2001

Low Temperature Physics

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[419][420][421][422][423][424] Br uk V. V., Er em enko V. V., Makedonskaya N. I., Sha baka yeva Yu. A., an d Si re nko V. A .Investig ation of magnetic flux g rad i e nts in har d super con duct orsBr uk V. V., Er em enko V. V., Makedonskaya N. I., Sha baka yeva Yu. A., an d Si re nko V. A .Investig ation of magnetic flux g rad i e nts in har d super con duct ors Analytical calculations of the transverse magnetostriction in a thin hard superconductor are presented in relation to the distributions of currents and fields within a superconducting specimen in a varied magnetic field. The approach is successfully tested on high-temperature superconductors. The flux distribution derived from magnetostriction measurements is in satisfactory agreement with that obtained from computer processing of magnetooptical images. The magnetic flux distribution below the irreversibility line of hard superconductors is derived from both original magnetization and magnetostriction measurements and image processing. Perfect consistency of the results is obtained for a family of high-temperature superconductors

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Magnetostriction of Superconductors

Gerber

2001

Modern Trends in Magnetostriction Study and Application

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Magnetostriction and thermal expansion of high temperature superconductors

Cited by 10 publications

References 5 publications

Flux-pinning-induced stress and magnetostriction in bulk superconductors

Flux-pinning-induced stress and magnetostriction in bulk superconductors

Investigation of magnetic flux gradients in hard superconductors

Magnetostriction of Superconductors

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