Ling<i>et al.</i>Reply:

Ling, Xinsheng; Park, S. R.; McClain, B.; Choi, Sung‐Min; Dender, D. C.; Lynn, J. W.

doi:10.1103/physrevlett.89.259702

Cited by 50 publications

(105 citation statements)

References 8 publications

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“…The BG phase at H < 0.8 kOe reaches upto the superconducting phase boundary without encountering any order-disorder phase transition a la the PE. This facet of the data of Park et al [24] could be termed as consistent with the earlier observation of Forgan et al [25] at a somewhat higher field in a SANS study in another crystal of Nb, which the latter report asserted as being more pure than the Nb crystal used by Ling et al [23].…”

Section: Introductionsupporting

confidence: 86%

“…The SMP anomaly in Bi2212 is considered to be caused by the first order transition from an ordered Bragg glass (BG) state to the disordered vortex glass (VG) state. The PE anomaly in the crystals of low T c 2H-NbSe 2 [22], Nb [23], etc., is also shown to fingerprint the first order like transition between the ordered and the disordered phases, such that one can easily encounter the superheating/supercooling effects across this transition as well as witness the presence of an interface separating weaker and stronger pinned regions above the onset temperature of the PE in the imaging experiments [22].…”

Section: Introductionmentioning

confidence: 99%

“…Park et al [24] have recently drawn attention to the presence of multi-critical point in the BG phase in a single crystal of Nb, which had earlier been studied by Ling et al [23]. Simultaneous measurement of small angle neutron scattering (SANS) and bulk ac susceptibility in a crystal of Nb have shown the observation of a BG phase below 0.8 kOe.…”

Section: Introductionmentioning

confidence: 99%

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Critical points in the Bragg glass phase of a weakly pinned crystal of Ca3Rh4Sn13

et al. 2006

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New experimental data are presented on the scan rate dependence of the magnetization hysteresis width ∆M (H) (∝ critical current density J c (H)) in isothermal M − H scans in a weakly pinned single crystal of Ca 3 Rh 4 Sn 13 , which displays second magnetization peak (SMP) anomaly as distinct from the peak effect (PE). We observe an interesting modulation in the field dependence of a parameter which purports to measure the dynamical annealing of the disordered bundles of vortices injected through the sample edges towards the destined equilibrium vortex state at a given H.These data, in conjunction with the earlier observations made while studying the thermomagnetic history dependence in J c (H) in the tracing of the minor hysteresis loops, imply that the partially disordered state heals towards the more ordered state between the peak field of the SMP anomaly and the onset field of the PE. The vortex phase diagram in the given crystal of Ca 3 Rh 4 Sn 13 has been updated in the context of the notion of the phase coexistence of the ordered and disordered regions between the onset field of the SMP anomaly and the spinodal line located just prior to the irreversibility line. A multi-critical point and a critical point in the (H, T ) region of the Bragg glass phase have been marked in this phase diagram and the observed behaviour is discussed in the light of recent data on multi-critical point in the vortex phase diagram in a single crystal of Nb.

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Section: Introductionsupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Critical points in the Bragg glass phase of a weakly pinned crystal of Ca3Rh4Sn13

et al. 2006

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“…[5][6][7] Fluctuations are also provided by quenched disorder that is intrinsically present in these materials, leading to complex glassy phases. [8][9][10][11][12][13] While several experimental methods have been used to investigate vortex matter, a direct image of the geometrical and topological properties of the vortices can be obtained by the Bitter decoration technique. 14 Its application to conventional superconductors provided the first direct proof of the vortex lattice 15 predicted by Abrikosov.…”

Section: Introductionmentioning

confidence: 99%

Grain boundaries in vortex matter

2005

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We explore the statistical properties of grain boundaries in the vortex polycrystalline phase of type-II superconductors. Treating grain boundaries as arrays of dislocations interacting through linear elasticity, we show that self-interaction of a deformed grain boundary is equivalent to a nonlocal long-range surface tension. This affects the pinning properties of grain boundaries, which are found to be less rough than isolated dislocations. The presence of grain boundaries has an important effect on the transport properties of type-II superconductors as we show by numerical simulations: our results indicate that the critical current is higher for a vortex polycrystal than for a regular vortex lattice. Finally, we discuss the possible role of grain boundaries in vortex lattice melting. Through a phenomenological theory we show that melting can be preceded by an intermediate polycrystalline phase.

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“…Metastable phases of vortex matter, supercooled vortex liquid and superheated vortex solid, have been identified. The results have been interpreted as a direct structural evidence for a first-order vortex solid-liquid transition at the peak effect [19]. However in 2002 Forgan et.al reported that in pure Nb the flux lattice structure is stable against thermal fluctuations over essentially all of the mixed state region, and that their SANS measurements confirm the Abrikosov picture near H c2 .…”

mentioning

confidence: 91%

SANS study of vortex lattice structural transition in optimally doped (Ba_1−xK_x)Fe₂As₂

Demirdiş¹,

Beek²,

Mühlbauer³

et al. 2016

J. Phys.: Condens. Matter

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Abstract. Small-angle neutron scattering on high quality single crystalline Ba 1−x KxFe 2 As 2 reveals the transition from a low-field vortex solid phase with orientational order to a vortex polycrystal at high magnetic field. The vortex order-disorder transition is correlated with the second-peak feature in isothermal hysteresis loops, and is interpreted in terms of the generation of supplementary vortex solid dislocations. The sharp drop of the structure factor above the second peak field is explained by the dynamics of freezing of the vortex ensemble in the high field phase.

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Linget al.Reply:

Cited by 50 publications

References 8 publications

Critical points in the Bragg glass phase of a weakly pinned crystal of Ca3Rh4Sn13

Critical points in the Bragg glass phase of a weakly pinned crystal of Ca3Rh4Sn13

Grain boundaries in vortex matter

SANS study of vortex lattice structural transition in optimally doped (Ba_1−xK_x)Fe₂As₂

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Linget al.Reply:

Cited by 50 publications

References 8 publications

Critical points in the Bragg glass phase of a weakly pinned crystal of Ca3Rh4Sn13

Critical points in the Bragg glass phase of a weakly pinned crystal of Ca3Rh4Sn13

Grain boundaries in vortex matter

SANS study of vortex lattice structural transition in optimally doped (Ba1−xKx)Fe2As2

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Product

Resources

About

SANS study of vortex lattice structural transition in optimally doped (Ba_1−xK_x)Fe₂As₂