High-Jc GdBa2Cu3O7 thin films on SrTiO3 substrates by pulsed laser deposition

Song, Sang Hun; Ko, K.P.; Ko, Rock-Kil; Song, K. J.; Moon, Seung‐Hyun; Yoo, Sang‐Im

doi:10.1016/j.physc.2007.04.237

Cited by 13 publications

(4 citation statements)

References 11 publications

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“…The challenge of such applications in strong magnetic fields favours materials other than YBa 2 Cu 3 O 7 (YBCO) with better superconducting properties, as the H irr values of YBCO thin films are too low. Due to its higher transition temperature, T c , its higher critical current density values [1] and the superior pinning properties due to a larger degree of rare-earth/Ba disorder [2], GdBa 2 Cu 3 O 7−δ (GBCO) has routinely been considered as a replacement for the standard YBCO [3][4][5][6]. Up to now, most investigations of the irreversibility field, H irr , at low temperatures have been done on YBCO [7,8].…”

Section: Introductionmentioning

confidence: 99%

Irreversibility field up to 42 T of GdBa₂Cu₃O_7-δthin films grown by PLD and its dependence on deposition parameters

Rosenzweig

Hänisch

Iida

et al. 2010

Supercond. Sci. Technol.

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We investigated the irreversibility field of GdBa 2 Cu 3 O 7−δ thin films grown epitaxially by pulsed laser deposition on single crystalline LaAlO 3 (100) substrates in pulsed magnetic fields up to 42 T and at temperatures between 50 and 100 K. The critical temperature T c reached values of 93.5 K with a T c of 0.6 K and an inductively measured self-field critical current density J c at 77 K of 3.7 MA cm −2 . The pulsed magnetic field measurements yield a strong dependence of H irr on the deposition rate, but the film thickness has a small influence on the resistive transition in high magnetic fields. A maximum irreversibility field H irr of 40.1 T was measured at a temperature of 50 K for a 300 nm thick film.

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Section: Introductionmentioning

confidence: 99%

Irreversibility field up to 42 T of GdBa₂Cu₃O_7-δthin films grown by PLD and its dependence on deposition parameters

Rosenzweig

Hänisch

Iida

et al. 2010

Supercond. Sci. Technol.

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“…It has a relatively high critical temperature, , and a relatively high irreversibility field, , too. According to recent studies, (GdBCO) has higher than YBCO, resulting in higher in thin films at 77 K [1]- [3]. Also, for GdBCO thin films and coated conductors (CC) a higher critical current density, , is reported in high magnetic fields at 77 K [1], [2], [4]- [6].…”

Section: Introductionmentioning

confidence: 99%

Structural and Superconducting Properties of Undoped and BZO-doped GdBCO Thin Films

Schlesier

Huhtinen

Paturi

et al. 2009

IEEE Trans. Appl. Supercond.

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We report the effect of 4 wt% BZO-doping in GdBCO thin films on (100) STO substrates with novel nanograined target materials deposited by pulsed laser deposition (PLD) method. X-ray diffraction, atomic force microscopy and magnetization measurements, which were made in particularly wide temperature and magnetic field range, were used to determine the structural and superconducting properties. The results were compared with ones of YBCO. The deposition temperature, s , is not very critical for GdBCO and it is found to be much lower in undoped and BZO-doped GdBCO than in YBCO. The BZO-doping of GdBCO enhanced the field dependence of critical current density, c , at low temperatures. Furthermore, BZO-doping enhances the accommodation field, , below 60 K being clearly higher at 10 K in doped GdBCO than in YBCO. The pinning mechanism in GdBCO was concluded to be similar to that of YBCO. Our results clearly show that undoped and BZO-doped nanophase GdBCO is a very promising target material for applications as well as for coated conductors.

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“…We also prepare 500 nm thick and 1 μm thick GdBCO films, and a 300 nm thick YBCO film for this study. The GdBCO films are grown epitaxially on LaAlO 3 (100) substrate using the pulsed laser deposition (PLD) method [21], with the YBCO film on CeO 2 -buffered sapphire being a commercial product of Ceraco ceramic coating GmbH. Here we call the GdBCO film and the YBCO film grown on single crystal dielectric substrates as the GdBCO film and the YBCO film, respectively.…”

Section: Methodsmentioning

confidence: 99%

Depth profiling of the microwave surface resistance of high-J_CGdBa₂Cu₃O_7−δcoated conductors grown using the RCE-DR process

Yang

Jung

Lee³

et al. 2016

Supercond. Sci. Technol.

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We study depth profiling of the microwave surface resistance (RS) of GdBa2Cu3O7−δ (GdBCO) coated conductors (CCs) grown using the reactive co-evaporation by deposition and reaction (RCE-DR) method, a method enabling extremely high deposition rate. GdBCO CCs with the critical current (IC) of more than 790 A cm−1 at 77 K in self-field are used for the study. The RS of the GdBCO CCs is measured at temperatures of 10–80 K using a 8.5 GHz TE011-mode rutile resonator, which is compared with that of YBa2Cu3O7−δ films and GdBCO films epitaxially grown on single crystal substrates. It turns out that there is significant inhomogeneity in the RS over the thickness of the GdBCO layer, with the RS value of the top part at 30 K being almost two times higher than the corresponding one of the bottom part. A transmission electron microscopy study reveals that Gd2O3 grains coexist with GdBCO grains with the average Gd2O3 grain sizes being ∼150 nm at the top and ∼100 nm at the bottom of the GdBCO layer. We relate the inhomogeneity in the RS of the GdBCO layer with the positional dependence of the Gd2O3 grain size, for which effects of the dielectric losses from the Gd2O3 grains on the measured RS of the GdBCO layer are considered. Our results imply that the critical current density, another important transport property of superconductors, could be inhomogeneous over the thickness of the GdBCO layer grown using the RCE-DR method.

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High-Jc GdBa2Cu3O7 thin films on SrTiO3 substrates by pulsed laser deposition

Cited by 13 publications

References 11 publications

Irreversibility field up to 42 T of GdBa₂Cu₃O_7-δthin films grown by PLD and its dependence on deposition parameters

Irreversibility field up to 42 T of GdBa₂Cu₃O_7-δthin films grown by PLD and its dependence on deposition parameters

Structural and Superconducting Properties of Undoped and BZO-doped GdBCO Thin Films

Depth profiling of the microwave surface resistance of high-J_CGdBa₂Cu₃O_7−δcoated conductors grown using the RCE-DR process

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High-Jc GdBa2Cu3O7 thin films on SrTiO3 substrates by pulsed laser deposition

Cited by 13 publications

References 11 publications

Irreversibility field up to 42 T of GdBa2Cu3O7-δthin films grown by PLD and its dependence on deposition parameters

Irreversibility field up to 42 T of GdBa2Cu3O7-δthin films grown by PLD and its dependence on deposition parameters

Structural and Superconducting Properties of Undoped and BZO-doped GdBCO Thin Films

Depth profiling of the microwave surface resistance of high-JCGdBa2Cu3O7−δcoated conductors grown using the RCE-DR process

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Product

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Irreversibility field up to 42 T of GdBa₂Cu₃O_7-δthin films grown by PLD and its dependence on deposition parameters

Irreversibility field up to 42 T of GdBa₂Cu₃O_7-δthin films grown by PLD and its dependence on deposition parameters

Depth profiling of the microwave surface resistance of high-J_CGdBa₂Cu₃O_7−δcoated conductors grown using the RCE-DR process