Critical currents, pinning forces and irreversibility fields in (YxTm1−x)Ba2Cu3O7 single crystals with columnar defects in fields up to 50 T

Trappeniers, Lieven; Vanacken, Johan; Weckhuysen, Liesbet; Rosseel, Kris; Didyk, A. Yu.; Goncharov, I.N.; Leonyuk, L.; Boon, Willy; Herlach, F.; Moshchalkov, Victor; Bruynseraede, Y.

doi:10.1016/s0921-4534(99)00011-8

Cited by 16 publications

(5 citation statements)

References 34 publications

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“…1͑a͒. 7,11 In addition, a cascade of ancillary defects propagates down to the implantation length of about 13 m, as shown in Fig. 1͑b͒.…”

Section: Experiments Detailsmentioning

confidence: 98%

“…It was earlier reported that truncated CDs ͑named hereafter as blind holes͒ and implantation of the HEHI into the HTSC materials also produce vortex pinning enhancements, especially at high temperatures and at high magnetic fields. [5][6][7] In this paper, we present a quantitative magneto-optical ͑QMO͒ imaging study of the magnetic field distribution in a high quality YBCO single crystal, which was locally irradiated in an alternating stripe pattern in order to simultaneously compare the intrinsic and the irradiation induced magnetic responses in a single sample. The cross section of the irradiated region was imaged by field emission scanning electron microscopy ͑FESEM͒ in order to elucidate the induced defect landscape.…”

Section: Introductionmentioning

confidence: 99%

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Enhancement of the irreversibility line inYBa2Cu3O6.95single crystals patterned by heavy ion lithography

et al. 2008

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High purity, detwinned YBa 2 Cu 3 O 7−x single crystals were locally irradiated with a stripe pattern using a microcollimated 250 MeV Au ion beam to a dose matching field of B ⌽ = 4 T. Electron microscopy measurements of the cross section of the irradiated crystal indicate the presence of nanometer columnar defects confined to a surface layer ͑blind holes͒ and an ensemble of ancillary defects in the bulk of the crystal. We present systematic studies of the effects of blind hole structures and of ancillary defects using quantitative magneto-optical imaging with a Bi:yttrium iron garnet indicator film. We observed a local reduction in the superconducting critical temperature near the surface layer where the blind holes were formed, due to the high irradiation fluence. The difference in the critical temperature between the surface layer and the bulk of the irradiated stripe zones enabled us to isolate and estimate the enhancement of the local vortex pinning due solely to the ancillary defects induced by the irradiation. We find that the blind holes with the additive contribution of the ancillary defects produce a pronounced upward shift in the irreversibility line and stronger vortex pinning with respect to the unirradiated stripe regions both at low and at high temperatures.

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“…1͑a͒. 7,11 In addition, a cascade of ancillary defects propagates down to the implantation length of about 13 m, as shown in Fig. 1͑b͒.…”

Section: Experiments Detailsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Enhancement of the irreversibility line inYBa2Cu3O6.95single crystals patterned by heavy ion lithography

et al. 2008

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“…Thin‐film samples, even epitaxial ones, are much better suited for obtaining high j c values due to their intrinsic defects, including a certain density of grain boundaries and several types of dislocations such as growth spirals . In addition, artificial, point‐like defects have been engineered including the examples of Zn‐ and Ni substitution on the copper sites in the CuO 2 planes , columnar defects by heavy‐ion irradiation , impurity (green) phase incorporation , and BaZrO 3 inclusions . The critical current densities achieved with epitaxial films are surprisingly high, up to the order of 10 8 A cm −2 , but this is more an advantage for chip‐like devices and does not solve the need for long‐distance low‐loss current transport.…”

Section: Superconducting Perovskitesmentioning

confidence: 99%

From colossal magnetoresistance to solar cells: An overview on 66 years of research into perovskites

Wagner

Wackers

Cardinaletti

et al. 2017

Phys. Status Solidi A

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Perovskites are a huge family of compounds to which the natural titanium mineral CaTiO 3 is the common ancestor. The cubic structure looks apparently simple, but the variety of metal ions and mixtures thereof that fit into a perovskite lattice is tremendous. Even in the case that the ionic radii do not allow for a perfect cubic ordering, there are various superstructures and orbital-ordering effects to cope elegantly with distortions. The compositional and structural flexibility offers a large toolbox to design and synthesize perovskites with tailored properties searched for by physicists, chemists, materials scientists and device engineers. These materials are equally of interest for fundamental studies and for applied research while both viewpoints cross-fertilize each other regularly. Our overview starts with the discovery of ferromagnetism in manganites in 1950 and ranges until 2016: Today, halide perovskites are fully in focus for their potential in photovoltaic applications. This is certainly not an endpoint, but another milestone in a long series of often-unexpected discoveries on an 'evergreen material'.Ball-and-stick model of the ideal cubic perovskite structure. The cation at the central position or 'B site' (small black dot) defines the group name (e.g., titanates) and plays a key role for the physical properties of the material.

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“…Though columnar defects creation needs advanced techniques these are highly suitable for enhancement of J c [13,14] and shifting of irreversibility line to higher field side [15]. Trappeniers et al studied columnar defects due to Kr ions in single crystal of Y x Tm (1Àx) Ba 2 Cu 3 O 7 which considerably enhanced J c , F p and irreversibility field [16]. 0.86 GeV Pb + ions produced continuous columnar defects that showed high J c values when the field direction coincided with tracks direction in YBCO films.…”

Section: Introductionmentioning

confidence: 99%

Critical current density enhancement by ion irradiation for thick YBa2Cu3O7−δ films prepared by diffusion reaction technique

Kujur

Behera

2015

Nuclear Instruments and Methods in Physics Research Section B:

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Critical currents, pinning forces and irreversibility fields in (YxTm1−x)Ba2Cu3O7 single crystals with columnar defects in fields up to 50 T

Abstract: We have studied the influence of columnar defects, created by heavy-ion (Kr) irradiation with doses up to 6·1011 Kr-ions/cm

Cited by 16 publications

References 34 publications

Enhancement of the irreversibility line inYBa2Cu3O6.95single crystals patterned by heavy ion lithography

Enhancement of the irreversibility line inYBa2Cu3O6.95single crystals patterned by heavy ion lithography

From colossal magnetoresistance to solar cells: An overview on 66 years of research into perovskites

Critical current density enhancement by ion irradiation for thick YBa2Cu3O7−δ films prepared by diffusion reaction technique

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