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Ge, Jun‐Yi; Gutiérrez, J.; Li, J.; Yuan, Jie; Wang, H.-B.; Yamaura, Kazunari; Takayama‐Muromachi, E.; Moshchalkov, Victor

doi:10.1103/physrevb.88.144505

Cited by 15 publications

(18 citation statements)

References 41 publications

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“…The two contrasting roles of the ac drive in different portions are attributed to the juxtaposition of the SMP anomaly (pinning induced) and the peak effect (PE) phenomenon (collapse of elasticity induced amorphization of the vortex matter). The unusual outcome of the imposition of an ac drive near the onset field of SMP anomaly in the present report also corroborates a very recent finding [50] in a different class of superconductor, (i.e., in Ba 0.5 K 0.5 Fe 2 As 2 ), wherein a large ac field (∼ 12 Oe) lowers the onset field value of the anomalous change in j c at a given temperature, thereby elucidating the role of ac driving force in facilitating the spatial disordering of the vortex matter in a portion of the phase-space where the ordered state is metastable superheated state.…”

Section: Introductionsupporting

confidence: 93%

Dual role of an ac driving force and the underlying two distinct order–disorder transitions in the vortex phase diagram of Ca 3 Ir 4 Sn 13

Kumar¹,

Singh²,

Thamizhavel³

et al. 2014

Physica C: Superconductivity and its Applications

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We present distinct demarcation of the Bragg glass (BG) to multi-domain vortex glass (VG) transition line and the eventual amorphization of the VG phase in a weakly pinned single crystal of the superconducting compound Ca3Ir4Sn13 on the basis of comprehension of the different yields about the second magnetization peak (SMP) anomaly in the dc magnetization and the corresponding anomalous feature in the ac susceptibility measurements. The shaking by a small ac magnetic field, inevitably present in the ac susceptibility measurements, is seen to result in contrasting responses in two different portions of the fieldtemperature (H, T) phase space of the multi-domain VG. In one of the portions, embracing the BG to VG transition across the onset of the SMP anomaly, the ac drive is surprisingly seen to assist the transformation of the well ordered BG phase to a lesser ordered VG phase. The BG phase exists as a superheated state over a small portion of the VG space and this attests to the first order nature of the BG to VG transition.

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Section: Introductionsupporting

confidence: 93%

Dual role of an ac driving force and the underlying two distinct order–disorder transitions in the vortex phase diagram of Ca 3 Ir 4 Sn 13

Kumar¹,

Singh²,

Thamizhavel³

et al. 2014

Physica C: Superconductivity and its Applications

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“…In a system with complex interactions (vortex-pinning, vortex-vortex, thermal fluctuations), memory effects often appear [24][25][26][27]. We have found that the PME only appears when cooling down the sample at sufficiently high cooling rate (5 K/min).…”

Section: Resultsmentioning

confidence: 77%

Paramagnetic Meissner effect in ZrB₁₂single crystal with non-monotonic vortex–vortex interactions

Gladilin

Sluchanko

et al. 2017

New J. Phys.

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The magnetic response related to the paramagnetic Meissner effect (PME) is studied in a high quality single crystal ZrB 12 with non-monotonic vortex-vortex interactions. We observe the expulsion and penetration of magnetic flux in the form of vortex clusters with increasing temperature. A vortex phase diagram is constructed, and shows that the PME can be explained by considering the interplay among the flux compression, the different temperature dependencies of the vortex-vortex and the vortex-pin interactions, and thermal fluctuations. Such a scenario is in good agreement with the results of magnetic relaxation measurements.

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“…During the past few years, numerous studies have been performed to understand the origin of SMP in different families of ironpnictides and there is still an ongoing research with newly prepared materials. 12,16,17 In the literature, it has been found that the mechanism responsible for the SMP appears to be system dependent, with explanations including a crossover from elastic to plastic, 12,18 order-disorder transition, 19,20 vortex-lattice phase transitions, 21,22 and it is even still unclear for few compounds. 23,24 For most of the systems exhibiting SMP, the associated line in the phase diagram corresponding to the peak field (H p ) extends from very low temperatures (with an exception in the case of Bi-2212 25,26 ) up to the temperatures close to the irreversibility line, where, in the case of pnictides, the SMP disappears only as T approaches T irr .…”

Section: Introductionmentioning

confidence: 99%

Plastic pinning replaces collective pinning as the second magnetization peak disappears in the pnictide superconductor Ba0.75K0.25Fe2As2

et al. 2017

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We report a detailed study of isofield magnetic relaxation and isothermal magnetization measurements with H c on an underdoped Ba0.75K0.25Fe2As2 pnictide single crystal, with superconducting transition temperature Tc = 28 K. The second magnetization peak (SMP) has been observed at temperatures below Tc/2 and vanished at higher temperatures. The observed behaviour of the SMP has been studied by measuring the magnetic field dependence of relaxation rate, R(H) and by performing the Maley's analysis. The results suggest that the crossover from collective to plastic pinning observed in the SMP disappears above 12 K with plastic pinning replacing collective pinning. An interesting H-T phase diagram is obtained. The critical current density (Jc) was estimated using Bean's model and found to be ∼ 3.4 × 10 9 A/m 2 at 10 K in the SMP region, which is comparable to an optimally doped Ba-KFe2As2 superconductor and may be exploited for potential technological applications. The pinning mechanism is found to be unconventional and does not follow the usual δl and δTc pinning models, which suggest the intrinsic nature of pinning in the compound.

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Peak effect in optimally dopedp-type single-crystal Ba0.5K0.5Fe
Jun‐Yi Ge
¹
,
J. Gutiérrez
²
,
J. Li
³

et al.

Cited by 15 publications

References 41 publications

Dual role of an ac driving force and the underlying two distinct order–disorder transitions in the vortex phase diagram of Ca 3 Ir 4 Sn 13

Dual role of an ac driving force and the underlying two distinct order–disorder transitions in the vortex phase diagram of Ca 3 Ir 4 Sn 13

Paramagnetic Meissner effect in ZrB₁₂single crystal with non-monotonic vortex–vortex interactions

Plastic pinning replaces collective pinning as the second magnetization peak disappears in the pnictide superconductor Ba0.75K0.25Fe2As2

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Peak effect in optimally dopedp-type single-crystal Ba0.5K0.5FeJun‐Yi Ge1, J. Gutiérrez2, J. Li3 et al.

Cited by 15 publications

References 41 publications

Dual role of an ac driving force and the underlying two distinct order–disorder transitions in the vortex phase diagram of Ca 3 Ir 4 Sn 13

Dual role of an ac driving force and the underlying two distinct order–disorder transitions in the vortex phase diagram of Ca 3 Ir 4 Sn 13

Paramagnetic Meissner effect in ZrB12single crystal with non-monotonic vortex–vortex interactions

Plastic pinning replaces collective pinning as the second magnetization peak disappears in the pnictide superconductor Ba0.75K0.25Fe2As2

Contact Info

Product

Resources

About

Peak effect in optimally dopedp-type single-crystal Ba0.5K0.5Fe
Jun‐Yi Ge
¹
,
J. Gutiérrez
²
,
J. Li
³

et al.

Paramagnetic Meissner effect in ZrB₁₂single crystal with non-monotonic vortex–vortex interactions