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Ikuta, Hiroshi; Hirota, Noriyuki; Nakayama, Y.; Kishio, K.; Kitazawa, K.

doi:10.1103/physrevlett.70.2166

Cited by 175 publications

(66 citation statements)

References 11 publications

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“…Both the history-dependent shape of the anomaly and the heating-rate dependence are typical for kinetic glass transitions [17][18][19][20][21] . We note that the large peaks in α(T) most likely are caused by magnetostrictive effects 22 as a result of macroscopic currents, which decay upon heating at the glass transition. The rate of decay of these currents is governed by the movement of the vortices, and, thus, provides a measure of the relaxation of the vortex matter.…”

Section: Methodsmentioning

confidence: 99%

‘Fragile Superconductivity’: A Kinetic Glass Transition in the Vortex Matter of the High-temperature Superconductor YBa2 Cu3O7-δ

et al. 2007

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Using high-resolution thermal expansion and magnetization measurements, we provide experimental evidence for a kinetic glass transition in the vortex matter of YBa 2 Cu 3 O 7-δ with some disorder. This transition, which represents the true superconducting transition in a magnetic field, exhibits many of the features of the usual glass transition found in supercooled structural liquids such as window glass. We demonstrate, using both kinetic and thermodynamic criteria, that this vortex matter is the most fragile system known to date, which we argue makes it possible to investigate the behavior very close to the Kauzmann temperature. Vortex matter, we suggest, may be a model system to study glassy behavior in general, which is expected to lead to a better understanding of the strong-fragile behavior in structural glasses.

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Section: Methodsmentioning

confidence: 99%

‘Fragile Superconductivity’: A Kinetic Glass Transition in the Vortex Matter of the High-temperature Superconductor YBa2 Cu3O7-δ

et al. 2007

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“…In high temperature superconductors (HTSs) the experimentally observed phenomenon of magnetostriction is predominated by the mechanism of the magnetostriction induced by the pinning forces [1]. In large crystals of these compounds giant magnetostriction, of an order of 10 −4 (the number means relative changes of the sample dimensions), at 4.2 K and in an external magnetic field of several tesla was found [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…In large crystals of these compounds giant magnetostriction, of an order of 10 −4 (the number means relative changes of the sample dimensions), at 4.2 K and in an external magnetic field of several tesla was found [1,2]. As in the case of the well-known Bean model [3], assuming the critical current density to be independent (or at least weakly dependent) on the magnetic field, it is easy to correlate the critical current density with the width of the magnetization hysteresis loop, a similar procedure can also be applied in the case of the magnetostriction hysteresis loops.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Fast Neutron Irradiation on the Magnetostriction of Ceramic YBa₂Cu₃O_7-δSample

et al. 2004

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We investigated the magnetostriction of ceramic YBa 2 Cu 3 O 7−δ sample both before and after fast neutron irradiation with the fluency of 7.55 × 10 17 n/cm 2 and energy of above 0.5 MeV. We have found that after irradiation the widths of both transverse and longitudinal magnetostriction hysteresis loops at a given temperature and at a given external magnetic field increased several times. At 4.2 K and in 10 tesla the widths of the magnetostriction hysteresis loop of the irradiated sample are of an order of 10 −5 . The results can be understood in the framework of the model of the magnetostriction induced by the pinning forces, assuming the stress in the sample to be induced mainly by the intragrain screening currents.

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“…1-4 that the irreversible magnetostriction of HTSC with high critical current densities j c is caused by the pressure of the magnetic field, which smears the magnetic flux within a specimen with strong pinning. The relevant reduced strain of a superconductor in a magnetic field is related to the magnetic flux distribution inside the sample by the elastic equations taking into account the balance of forces in a system «flux line lattice imperfection», provided that the fully penetrated state has been established [1]:…”

Section: Calculationsmentioning

confidence: 99%

“…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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Giant magnetostriction inBi2Sr2
Hiroshi Ikuta
¹
,
Noriyuki Hirota
²
,
Y. Nakayama
³

et al.

Cited by 175 publications

References 11 publications

‘Fragile Superconductivity’: A Kinetic Glass Transition in the Vortex Matter of the High-temperature Superconductor YBa2 Cu3O7-δ

‘Fragile Superconductivity’: A Kinetic Glass Transition in the Vortex Matter of the High-temperature Superconductor YBa2 Cu3O7-δ

The Influence of Fast Neutron Irradiation on the Magnetostriction of Ceramic YBa₂Cu₃O_7-δSample

Investigation of magnetic flux gradients in hard superconductors

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Giant magnetostriction inBi2Sr2Hiroshi Ikuta1, Noriyuki Hirota2, Y. Nakayama3 et al.

Cited by 175 publications

References 11 publications

‘Fragile Superconductivity’: A Kinetic Glass Transition in the Vortex Matter of the High-temperature Superconductor YBa2 Cu3O7-δ

‘Fragile Superconductivity’: A Kinetic Glass Transition in the Vortex Matter of the High-temperature Superconductor YBa2 Cu3O7-δ

The Influence of Fast Neutron Irradiation on the Magnetostriction of Ceramic YBa2Cu3O7-δSample

Investigation of magnetic flux gradients in hard superconductors

Contact Info

Product

Resources

About

Giant magnetostriction inBi2Sr2
Hiroshi Ikuta
¹
,
Noriyuki Hirota
²
,
Y. Nakayama
³

et al.

The Influence of Fast Neutron Irradiation on the Magnetostriction of Ceramic YBa₂Cu₃O_7-δSample