Epitaxial Growth of Superconducting Ba(Fe1-xCox)2As2Thin Films on Technical Ion Beam Assisted Deposition MgO Substrates

Iida, K.; Hänisch, Jens; Trommler, Sascha; Matias, Vladimir; Haindl, S.; Kurth, F.; Lucas, I.; Hühne, Ruben; Kidszun, M.; Engelmann, Jan; Schultz, L.; Holzäpfel, B.

doi:10.1143/apex.4.013103

Cited by 83 publications

(86 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, Si et al 232) reported high-J c 11 films on IBAD-MgO tapes. Their J c values on the order of 10 5 A/cm 2 are comparable to that of Ba122:Co reported by Iida et al 205) but lower than that (1.2-3.6 MA/cm 2 ) of Ba122:Co reported by Katase et al 206) It is noteworthy that J c of their 11 film still remains above 10 4 A/cm 2 in a high magnetic field of 25 T, reflecting the high upper critical magnetic field.…”

Section: )supporting

confidence: 86%

See 1 more Smart Citation

Thin Film Growth and Device Fabrication of Iron-Based Superconductors

et al. 2012

View full text Add to dashboard Cite

Iron-based superconductors have received much attention as a new family of high-temperature superconductors owing to their unique properties and distinct differences from cuprates and conventional superconductors. This paper reviews progress in thin film research on iron-based superconductors since their discovery for each of five material systems with an emphasis on growth, physical properties, device fabrication, and relevant bulk material properties.

show abstract

Section: )supporting

confidence: 86%

“…42(a)] show a sharp transition, indicating that granularity is not an issue (i.e., no weak-link behavior). Values of self-field J c of 3.6, 1.6, and 1.2 MA/cm 2 , which are higher than that reported by Iida et al, 205) were obtained for Á0 MgO ¼ 7:3, 6.1, and 5.5…”

Section: Wires and Tapescontrasting

confidence: 61%

Thin Film Growth and Device Fabrication of Iron-Based Superconductors

et al. 2012

View full text Add to dashboard Cite

show abstract

“…By comparing with similar studies on Co-doped BaFe 2 As 2 coated conductors 6 , we point out the necessity of biaxial texture in oxypnictide wires and tapes for high J c .…”

Section: 13mentioning

confidence: 55%

Highly textured oxypnictide superconducting thin films on metal substrates

Iida

Kurth

Chihara

et al. 2014

Applied Physics Letters

Self Cite

View full text Add to dashboard Cite

Highly textured NdFeAs(O,F) thin films have been grown on ion beam assisted deposition (IBAD)-MgO/Y 2 O 3 /Hastelloy substrates by molecular beam epitaxy. The oxypnictide coated conductors showed a superconducting transition temperature (T c ) of 43 K with a self-field critical current density (J c ) of 7.0 × 10 4 A/cm 2 at 5 K, more than 20 times higher than powder-in-tube processed SmFeAs(O,F) wires. Albeit higher T c as well as better crystalline quality than Co-doped BaFe 2 As 2 coated conductors, in-field J c of NdFeAs(O,F) was lower than that of Co-doped BaFe 2 As 2 . These results suggest that grain boundaries in oxypnictides reduce J c significantly compared to that in Co-doped BaFe 2 As 2 and, hence biaxial texture is necessary for high J c .PACS numbers: 74.70. Xa, 81.15.Fg, 74.25.Sv, 74.25.FElectron or hole doped AEFe 2 As 2 (AE =Ba and Sr) and Fe(Se,Te) show high upper critical fields with low anisotropies at low temperatures that offer a unique possibility for high field magnet applications 1,2 . Thanks to the recent progress of processing technology, powder-intube (PIT) processed AEFe 2 As 2 yields high performance of in-field critical current density (J c ) 3-5 . Furthermore, Co-doped BaFe 2 As 2 and Fe(Se,Te) on ion beam assisted deposition (IBAD)-MgO/Y 2 O 3 /Hastelloy with comparable J c to those on single crystalline substrates have been demonstrated, although the texture quality of the formers is inferior to the latters 6-9 . These results indicate that J c properties are quite robust against grain boundaries (GBs) in those materials. Indeed, the critical angle for Co-doped BaFe 2 As 2 at which J c starts to being degraded is twice as large as cuprates

show abstract

“…These results suggest that the discovered iron based superconductors are exhibiting weak link grain boundary behavior similar to high-T c cuprate superconductors. An effective method to overcome the weak link problem is to engineering textured grains in iron based superconductors to minimize deterioration of the critical current density across high-angle grain boundaries.Recently Co-doped Ba122 coated conductors have been grown by several groups utilizing the existing YBCO coated conductor technology and have reached a self-field J c over 1 MA/cm 2 [21][22][23]. However, the technology has the shortcoming of low production rate, complexity and high equipment cost.…”

mentioning

confidence: 99%

High transport critical current densities in textured Fe-sheathed Sr1−xKxFe2As2+Sn superconducting tapes

Gao

Wang

Yao

et al. 2011

Applied Physics Letters

View full text Add to dashboard Cite

Abstract:We report the realization of grain alignment in Sn-added Sr 1-x K x Fe 2 As 2 superconducting tapes with Fe sheath prepared by ex-situ powder-in-tube method. At 4.2 K, high transport critical current densities J c of 2.5×10 4 A/cm 2 (I c = 180 A) in self-field and 3.5×10 3 A/cm 2 (I c = 25.5 A) in 10 T have been measured. These values are the highest ever reported so far for Fe-based superconducting wires and tapes. We believe the superior J c in our tape samples are due to well textured grains and strengthened intergrain coupling achieved by Sn addition. Our results demonstrated an encouraging prospect for application of iron based superconductors.* Author to whom correspondence should be addressed; E-mail: ywma@mail.iee.ac.cn 2 The discovery of superconductivity in LaFeAsO 1-x F x and related compounds, with a higher transition temperature, T c of ~55 K, has triggered great research interests from both theoretical and applied aspects [1][2][3][4][5][6][7]. In addition to T c , these iron based superconductors were reported to have a very high upper critical field, B c2 , and low B c2 anisotropy, making them potential candidates for a wide array of future applications [8][9][10][11]. The early results indicate that the global critical current is limited by intergrain currents over the grain boundaries in polycrystalline bulk and wires [12][13][14][15][16][17][18]. Recent experiments revealed that high-angle grain boundary largely deteriorates critical current density J c in Ba(Fe 1-x Co x ) 2 As 2 bicrystals [19,20]. These results suggest that the discovered iron based superconductors are exhibiting weak link grain boundary behavior similar to high-T c cuprate superconductors. An effective method to overcome the weak link problem is to engineering textured grains in iron based superconductors to minimize deterioration of the critical current density across high-angle grain boundaries.Recently Co-doped Ba122 coated conductors have been grown by several groups utilizing the existing YBCO coated conductor technology and have reached a self-field J c over 1 MA/cm 2 [21][22][23]. However, the technology has the shortcoming of low production rate, complexity and high equipment cost. Furthermore, it is hard to be applied to the volatile elements in iron based superconductors such as alkali metals doped 122 phase and F doped 1111 phase. Cold deformation process is a well-developed technique used to enhance the degree of grain alignment and critical current density of Bi2223 superconductors [24,25]. It is unsurprising that this technique may also be suitable for iron based superconductors too. Besides grain alignment, adding metallic elements is another effective way to improve the grain connectivity of the iron based superconductors. For example, we have reported that the superconducting properties of the 122 phase iron based superconductor can be significantly increased by Ag or Pb addition [26,27]. Recently Togano et al [28] reported further improvement in transport critical current in the Ba122 wires with A...

show abstract

Epitaxial Growth of Superconducting Ba(Fe_1-xCo_x)₂As₂Thin Films on Technical Ion Beam Assisted Deposition MgO Substrates

Cited by 83 publications

References 14 publications

Thin Film Growth and Device Fabrication of Iron-Based Superconductors

Thin Film Growth and Device Fabrication of Iron-Based Superconductors

Highly textured oxypnictide superconducting thin films on metal substrates

High transport critical current densities in textured Fe-sheathed Sr1−xKxFe2As2+Sn superconducting tapes

Contact Info

Product

Resources

About