Influence of BaZrO3 dopant concentration on properties of YBa2Cu3O6+x films in magnetic fields up to 30 T

Huhtinen, H.; Irjala, M.; Paturi, P.; Shakhov, M. A.; Laiho, R.

doi:10.1063/1.3329539

Cited by 17 publications

(9 citation statements)

References 52 publications

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“…Thus, we can conclude that the magnetic T c can be used as a proxy for the zero-field resistive T c . Additionally, the values of the B irr are rather close to each other in different samples (figure 3 inset) and the values are roughly the same as in the BZO-doped samples [18]. The dependences of B irr as a function of temperature are also rather linear at all concentrations.…”

Section: Resultssupporting

confidence: 70%

Dirty limit scattering behind the decreased anisotropy of doped YBa₂Cu₃O_7−δthin films

Malmivirta

Palonen

Inkinen³

et al. 2016

J. Phys.: Condens. Matter

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We measured the resistivity of pulsed-laser-deposited BaCeO3 (BCO)-doped YBCO thin films containing spherical BCO particles in fields up to 30 T. The average diameter of the particles depends on the dopant concentration being below 4 nm in all the samples. Raised values of the upper critical field, Bc2, were observed in all the samples. Additionally, the parameter γ, describing the electron mass anisotropy, decreased from 6.2 in the undoped sample to 3.1 in the 8 wt.% BCO-doped sample. These results can be explained by the increased number of defects decreasing the mean free path of electrons and thus lowering the coherence length, which in turn increases Bc2.

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Section: Resultssupporting

confidence: 70%

Dirty limit scattering behind the decreased anisotropy of doped YBa₂Cu₃O_7−δthin films

Malmivirta

Palonen

Inkinen³

et al. 2016

J. Phys.: Condens. Matter

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“…The Fpmax along B//c of ~ 97.7 GNm -3 for the 2% ML sample at 65 K is 1.7 times of the Fpmax of ~ 57.1 GNm -3 in the 2% SL sample and surpasses the ~ 80 GNm -3 of the 2% BHO-YBCO SL sample [16]. It should be noted that the Fpmax values for the 2% SL sample are comparable to that reported in literature [5,[39][40][41]. Indeed, Ca2+/Y3+ substitution could be energetically preferred in strain-free or low-strain conditions at low BZO doping.…”

Section: Resultssupporting

confidence: 84%

Interface Engineering for Enhanced Magnetic Vortex Pinning by 1D-BZO APCs in a Wide Angular Range

Ogunjimi

Sebastian

Zhang

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Microstructural analysis of the BaZrO3 (BZO)/YBa2Cu3O7 (YBCO) interface has revealed a highly defective and oxygen deficient 2-3 nm thick YBCO column surrounding the BZO one-dimensional artificial pinning centers (1D-APCs). The resulting semi-coherent interface is the consequence of the ∼7.7% BZO/YBCO lattice mismatch and is responsible for the low pinning efficiency of BZO 1D-APCs. Herein, we report an interface engineering approach of dynamic Ca/Cu replacement on YBCO lattice to reduce/eliminate the BZO/YBCO lattice mismatch for improved pinning at a wide angular range of the magnetic field orientation. The Ca/Cu replacement induces a local elongation of the YBCO c-lattice near the BZO/YBCO interface, thereby ensuring a reduction in the BZO/YBCO lattice mismatch to ∼1.4% and a coherent BZO/YBCO interface. This has resulted in enhanced pinning at B//c-axis and a broad angular range of B-field orientation. For example, the 6 vol.% BZO/YBCO film with interface engineering exhibits F p ∼158 GN/m3 at 65 K and B//c-axis, which is 440% higher than the ∼36.1 GN/m3 for the reference 6% BZO/YBCO sample, and enhanced Jc and F p in a wide angular range up to ∼ 80°. This result illustrates a facile scheme for engineering 1D-APC/YBCO interface to resume the pristine pinning efficiency of the 1D-APCs.

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“…Ultimately, we should be able to tailor the BZO defect density to achieve an optimal superconducting performance at a given application specific, operating temperature and applied magnetic field. Although previous work has reported the importance of controlling the columnar defect density to enhance and tailor the in-field J c properties17181920, there is no report of systematic variation of the optimal columnar defect density as a function of magnetic field strength, orientation, and operating temperature.…”

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confidence: 99%

Engineering nanocolumnar defect configurations for optimized vortex pinning in high temperature superconducting nanocomposite wires

Wee

Zuev

Cantoni

et al. 2013

Sci Rep

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We report microstructural design via control of BaZrO3 (BZO) defect density in high temperature superconducting (HTS) wires based on epitaxial YBa2Cu3O7-δ (YBCO) films to achieve the highest critical current density, Jc, at different fields, H. We find the occurrence of Jc(H) cross-over between the films with 1–4 vol% BZO, indicating that optimal BZO doping is strongly field-dependent. The matching fields, Bφ, estimated by the number density of BZO nanocolumns are matched to the field ranges for which 1–4 vol% BZO-doped films exhibit the highest Jc(H). With incorporation of BZO defects with the controlled density, we fabricate 4-μm-thick single layer, YBCO + BZO nanocomposite film having the critical current (Ic) of ~1000 A cm−1 at 77 K, self-field and the record minimum Ic, Ic(min), of 455 A cm−1 at 65 K and 3 T for all field angles. This Ic(min) is the largest value ever reported from HTS films fabricated on metallic templates.

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Influence of BaZrO3 dopant concentration on properties of YBa2Cu3O6+x films in magnetic fields up to 30 T

Cited by 17 publications

References 52 publications

Dirty limit scattering behind the decreased anisotropy of doped YBa₂Cu₃O_7−δthin films

Dirty limit scattering behind the decreased anisotropy of doped YBa₂Cu₃O_7−δthin films

Interface Engineering for Enhanced Magnetic Vortex Pinning by 1D-BZO APCs in a Wide Angular Range

Engineering nanocolumnar defect configurations for optimized vortex pinning in high temperature superconducting nanocomposite wires

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Influence of BaZrO3 dopant concentration on properties of YBa2Cu3O6+x films in magnetic fields up to 30 T

Cited by 17 publications

References 52 publications

Dirty limit scattering behind the decreased anisotropy of doped YBa2Cu3O7−δthin films

Dirty limit scattering behind the decreased anisotropy of doped YBa2Cu3O7−δthin films

Interface Engineering for Enhanced Magnetic Vortex Pinning by 1D-BZO APCs in a Wide Angular Range

Engineering nanocolumnar defect configurations for optimized vortex pinning in high temperature superconducting nanocomposite wires

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Product

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Dirty limit scattering behind the decreased anisotropy of doped YBa₂Cu₃O_7−δthin films

Dirty limit scattering behind the decreased anisotropy of doped YBa₂Cu₃O_7−δthin films