Motions of the flux lines in high-T
                     c superconductors from NMR linewidth, relaxation and spin echo decay

Borsa, F.; Carretta, P.; Cintolesi, F.; Corti, M.; Rigamonti, A.; Suh, B. J.; Torgeson, D. R.

doi:10.1007/bf03162039

Cited by 13 publications

(11 citation statements)

References 27 publications

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“…3.7. To within our precision, the hij) and ^^Cl NMR measurements yield the same 7yv(//) dependence for/Tl c. Similar to previous results [34], no obvious anomaly in X\\{T) is seen at ~ 260 K; rather, X|| (7) appears to show only a smooth minimum at Tcr« 300 K. However, examination of the temperature derivative of these X\\(T) and additional data at other fields reveals a local minimum in slope at TV for each data set, which is found to be qualitatively field-independent, consistent with our NMR results. 1.75 0.95 T and the TaoiH) calculated from Eq.…”

Section: Resultssupporting

confidence: 89%

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Nuclear magnetic resonance: its role as a microscopic probe of the electronic and magnetic properties of high-T[subscript c] superconductors and related materials

Suh

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Section: Resultssupporting

confidence: 89%

“…A number of pioneering NMR works on the vortex state in HTSC have been reported in recent years and are reviewed in Ref. [7].…”

mentioning

confidence: 99%

Nuclear magnetic resonance: its role as a microscopic probe of the electronic and magnetic properties of high-T[subscript c] superconductors and related materials

Suh

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“…4 HgBa 2 CuO 4ϩ␦ ͑Hg1201͒ which has the highest critical temperature, T c , among the single CuO 2 layered compounds, is a good system for an NMR study of HTSC because of its relative simple structure 5 and its stability with respect to oxygen stoichiometry. There is only one kind of Cu site in the usual square-planar coordination with four oxygen atoms in the same plane of the Cu.…”

Section: Introductionmentioning

confidence: 99%

Hg199andCu<

et al. 1996

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“…The second are microscopic methods, including the method of dephasing of the nuclear spin echo, that gives the spatial distribution of magnetic field in vortex cores [20], which is achieved by the action of magnetic pulses on the spin system of nuclei, located in normal cores of the Abrikosov vortex lattice. The mechanical method of investigation of the stimulated dynamics of the Abrikosov vortex lattice, proposed by us, is the development of a currentless mechanical method of the investigation of pinning [21,22] based on the measurement of the mechanical moment acting on the superconducting sample with axial symmetry, which is located in an external (transverse) magnetic field.…”

Section: Methodsmentioning

confidence: 99%

Investigation of stimulated dynamics of vortex matter in high-temperature superconductors

Chigvinadze¹,

Acrivos

Ashimov³

et al. 2006

Physics Letters A

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INTRODUCTION.Investigation of vortex state stimulated dynamics in high-temperature superconductors (HTSC) is one of the most important problems from the point of view of practical applications in the new generation of electronic devices operating on the basis of HTSC materials, as well as, from the point of view of fundamental problems connected with hightemperature superconductivity [1]. It is clear that vortex states in superconductors are complicated and multiform, but they are exceptionally important for understanding the behavior of high-temperature superconductors in electromagnetic fields and under the current loads [2]. The critical temperature T c of the superconducting transition of HTSC cuprates is so high that they remain superconductive at temperatures, at which the thermal fluctuations play a noticeable role, as their energy become comparable with the elastic energy of vortices and also with the pinning energy [3]. It creates prerequisites for phase transitions [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. In the type-II HTSC superconductors the number of vortices, "particles" in the vortex matter may be changed in a very wide range, several orders of magnitude by varying the magnetic field, B. As the interaction between the vortices is changed, thermal fluctuations in the HTSC vortex matter can be observed in a very wide temperature interval, on the B-T phase diagram. This gives a good possibility to study the disordered media -one of the central problems of condensed state physics. The investigation of vortex matter dynamics is of particularly topical interest in the case of HTSCs, which, because of their high critical temperatures and layered structure are characterized by a much higher mobility of the vortex lattice, as compared with the ordinary type-II superconductors, which is hampered by pinning connected with various defects of the crystal structure. These defects are the pinning centers that prevent the flow of magnetic flux and the energy dissipation, accompanying it. In the strongly anisotropic high-temperature superconductors, as it was shown in recent works [16][17][18], the critical current at the transition of 3D vortices in the quasi-two-dimensional 2D vortices can be sharply increased, making such anisotropic high-temperature superconductors, e.g. BiPbSrCaCuO system, useful for technical applications. Furthermore, the upper critical field H c2 , at which the superconductivity in these materials is

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Motions of the flux lines in high-T c superconductors from NMR linewidth, relaxation and spin echo decay

Cited by 13 publications

References 27 publications

Nuclear magnetic resonance: its role as a microscopic probe of the electronic and magnetic properties of high-T[subscript c] superconductors and related materials

Nuclear magnetic resonance: its role as a microscopic probe of the electronic and magnetic properties of high-T[subscript c] superconductors and related materials

Hg199andCu<

Investigation of stimulated dynamics of vortex matter in high-temperature superconductors

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