Vortex instability and hysteresis effects in I–V curves of superconducting Y1Ba2Cu3O7−δ

Kiliç, A.; Kılıç, Kıvılcım; Çetin, O.

doi:10.1016/s0921-4534(02)01967-6

Cited by 13 publications

(6 citation statements)

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“…On the other hand, when a ZFC V -I curve is measured at the initial state with j col , the clockwise loop will be detected. One can find the relevant experimental evidences from [7,11], just as seen in single crystals 2H-NbSe 2 [6]. Thus, the simulation is useful for understanding the dynamical hysteresis originating from different mechanisms in a variety of samples, including those reported in [1,2].…”

Section: Other V -I Loopmentioning

confidence: 95%

“…However, the above-mentioned conclusion cannot be used to explain the experimental observation in [6]. To understand this, we think it is important to estimate if the experimental fast current ramping is still fast according to equation (11). We need to calculate the experimental v and v a in [6] according to equations ( 2) and (11), respectively.…”

Section: Flux Creep V -I Loopmentioning

confidence: 99%

“…To understand this, we think it is important to estimate if the experimental fast current ramping is still fast according to equation (11). We need to calculate the experimental v and v a in [6] according to equations ( 2) and (11), respectively. v is nearly equal to v 0 ( j/j c = 1), which can be estimated by E = v B = ρ f j c ; see also [19].…”

Section: Flux Creep V -I Loopmentioning

confidence: 99%

“…Most major electric or/and magnetic phenomena in superconductors are strongly coupled to dynamical and non-equilibrium processes, in particular, those responsible for the pronounced history effect (HE) of vortex matter frequently observed in thermal, magnetic and current cycles. One type of HE in electric transport measurement, the hysteresis loop of V -I curves, has drawn much attention recently [1][2][3][4][5][6][7][8][9][10][11][12][13]. Several types of hysteresis loop have been observed and different explanations have been proposed.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the direction of the V -I loop relating to the specific conditions in experiments (such as zero-field cooling (ZFC) or 3 Author to whom any correspondence should be addressed. field cooling (FC), or the field direction) has been attributed to the inhomogeneity of the flux pinning strength for polycrystalline superconductors [7][8][9][10][11]. However, there are still some problems beyond our grasp.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Dynamical hysteresisV–Icurves of superconductors

Zhang

Ding

et al. 2005

Supercond. Sci. Technol.

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We study the dynamical hysteresis of transport V –I characteristics based on the flux creep model characterized by flux diffusion speed v = v0(j/jc)|j/jc|n. It is shown that there are two sorts of hysteresis loop in the V –I curve: clockwise and anticlockwise. The clockwise loop can be observed if v is lower by far than the speed of the applied current va (, where d is the sample thickness): . This formula predicts that it is very difficult to observe the V –I loop in a thin film because of its small d. Furthermore, the clockwise loop could always be observed if the critical current of the sample increases with time, whereas the anticlockwise loop could only be explained by the critical current decreasing with time, no matter which mechanism is responsible for the critical current’s change. The numerical results could be used to understand experiments on a variety of samples.

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