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Öner Y, Boyraz C. Critical current density and flux pinning in BaFe 1.9Pt 0.1As 2 and La doped Ba 0.95La 0.05Fe 1.9Pt 0.1As 2 polycrystals. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2019; 31:155801. [PMID: 30777935 DOI: 10.1088/1361-648x/ab0061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We present the field and temperature dependence of the magnetizations of BaFe1.9Pt0.1As2 and Ba0.95La0.05Fe1.9Pt0.1As2 samples synthesized by solid-state reaction method. The samples were formed as a single phase in the ThCr2Si2-type structure. Replacing Ba with the smaller La atom results in a lattice shrinkage. The critical current, J c (H, T) has been determined (using Bean's critical state model) from magnetic hysteresis loops in a temperature range between T = 5 K and the superconducting transition temperatures (20 K), in fields up to H = 9 T. We find a nonmonotonic 'fishtail' shape (exhibiting a second peak) of the magnetization loops as well as a very large irreversibility. We observe a remarkable flux jump at T = 5 K for BaFe1.9Pt0.1As2 due to magneto-thermal instability, but a very sharp magnetization peak for Ba0.95La0.05Fe1.9Pt0.1As2 near H = 0, which corresponds to a much-reduced relaxation rate of vortices. J c decreases exponentially with temperature as well as with field in lower temperatures and fields ranges. La doping causes a considerable increase in the irreversibility, leading to a significant enhancement of J c. The analysis shows that the high J c is mainly due to collective (weak) pinning of vortices by dense microscopic point defects with some contribution from a strong pinning mechanism. The normalized pinning force F p/F p,max as a function of the reduced magnetic field h = H/H irr is also obtained. Using the approaches of Dew-Hughes (1974 Phil. Mag. 30 293) and Kramer (1973 J. Appl. Phys. 44 1360), we determine the nature of the pining sources. It is found that many different pinning mechanisms are active simultaneously. The modified expression of F p/F p,max based on collective pinning theory enables us to determine the field dependence of the relaxation rate S(H, T = 5 K) indirectly instead of using more difficult relaxation measurements. Finally, all drastic changes with La doping are clearly demonstrated and investigated under different models introduced in the literature.
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Affiliation(s)
- Y Öner
- Faculty of Science and Letters, Department of Physics Engineering, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey
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Liebenberg DH, Soulen RJ, Francavilla TL, Fuller-Mora WW, McIntyre PC, Cima MJ. Current-voltage measurements of thin YBa2Cu3O6.9 films compared with a modified Ambegaokar-Halperin theory. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:11838-11847. [PMID: 9977926 DOI: 10.1103/physrevb.51.11838] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Pereyra P, Kunold A. Quantum interference and critical currents in polycrystalline high-Tc samples. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:3820-3823. [PMID: 9979201 DOI: 10.1103/physrevb.51.3820] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Soulen RJ, Francavilla TL, Drews AR, Toth L, Osofsky MS, Lechter WL, Skelton EF. Transport studies of bulk Pb0.2Hg0.8Ba2Ca1.75Cu3Ox. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:1393-1396. [PMID: 9978314 DOI: 10.1103/physrevb.51.1393] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Müller K, Andrikidis C, Liu HK, Dou SX. Intergranular and intragranular critical currents in silver-sheathed Pb-Bi-Sr-Ca-Cu-O tapes. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:10218-10224. [PMID: 9975103 DOI: 10.1103/physrevb.50.10218] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Soulen RJ, Francavilla TL, Fuller-Mora WW, Miller MM, Joshi CH, Carter WL, Rodenbush AJ, Manlief MD, Aized D. Explanation of the dissipation observed in several high-temperature superconductors using a modified Ambegaokar-Halperin model. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:478-487. [PMID: 9974565 DOI: 10.1103/physrevb.50.478] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Jung J, Mohamed MA, Isaac I, Friedrich L. Josephson-flux depinning in granular YBa2Cu3O7- delta. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:12188-12199. [PMID: 10010094 DOI: 10.1103/physrevb.49.12188] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Bulaevskii LN, Daemen LL, Maley MP, Coulter JY. Limits to the critical current in high-Tc superconducting tapes. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:13798-13816. [PMID: 10007782 DOI: 10.1103/physrevb.48.13798] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Kung PJ, Maley MP, McHenry ME, Willis JO, Murakami M, Tanaka S. Flux pinning by Y2BaCuO5 precipitates and field- and temperature-driven pinning centers in melt-powder-melt-growth processed YBa2Cu3O7. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:13922-13938. [PMID: 10007793 DOI: 10.1103/physrevb.48.13922] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Jung J, Isaac I, Mohamed MA. Effect of intergrain junctions and flux pinning on transport critical currents in YBa2Cu3O7- delta granular superconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:7526-7536. [PMID: 10006921 DOI: 10.1103/physrevb.48.7526] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Dong SY, Kwok HS. Observation of Jc oscillations in bitextured YBa2Cu3O7- delta films. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:6488-6491. [PMID: 10009198 DOI: 10.1103/physrevb.48.6488] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Gaffney C, Petersen H, Bednar R. Phase-slip analysis of the non-Ohmic transition in granular YBa2Cu3O6.9. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:3388-3392. [PMID: 10008768 DOI: 10.1103/physrevb.48.3388] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Mehbod M, Sergeenkov S, Ausloos M, Schroeder J, Dang A. ac susceptibility in YBa2(Cu1-xFex)3O7- delta : Evidence for two-step irreversibility-line crossover. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:483-486. [PMID: 10006798 DOI: 10.1103/physrevb.48.483] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Doyle TB, Doyle RA. Morphology-dependent intergranular behavior in high-Tc superconducting Y-Ba-Cu-O. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:8111-8118. [PMID: 10004822 DOI: 10.1103/physrevb.47.8111] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Wosik J, Xie LM, Chau R, Samaan A, Wolfe JC, Selvamanickam V, Salama K. Surface resistance of grain-aligned YBa2Cu3Ox bulk: Evidence for two kinds of weak link. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:8968-8977. [PMID: 10004945 DOI: 10.1103/physrevb.47.8968] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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López D, Stastn P, Leyarovska N, Matacotta FC. Magnetoresistance as a local magnetometer: Lower critical field of ceramic superconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:11160-11162. [PMID: 10002988 DOI: 10.1103/physrevb.46.11160] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Tiernan WM, Hallock RB. Superconducting properties of polycrystalline YBa2Cu3O7- delta : Evidence for a gauge glass. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:3688-3691. [PMID: 10004090 DOI: 10.1103/physrevb.46.3688] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Miu L. Low-field intragranular irreversibility line of Bi2Sr2Ca2Cu3O10 high-temperature superconductors determined by intergranular critical-current measurements. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:1172-1175. [PMID: 10003307 DOI: 10.1103/physrevb.46.1172] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Tkaczyk JE, Arendt RH, Garbauskas MF, Hart HR, Lay KW, Luborsky FE. Critical-state scaling and weak links in Ag-sheathed Bi2Sr2Ca2Cu3Oz. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 45:12506-12512. [PMID: 10001290 DOI: 10.1103/physrevb.45.12506] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Wright AC, Xia TK, Erbil A. Phase-slip mechanism for dissipation in high-Tc superconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 45:5607-5613. [PMID: 10000278 DOI: 10.1103/physrevb.45.5607] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Wright AC, Zhang K, Erbil A. Dissipation mechanism in a high-Tc granular superconductor: Applicability of a phase-slip model. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:863-866. [PMID: 9999199 DOI: 10.1103/physrevb.44.863] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Lan MD, Liu JZ, Shelton RN. Critical current density in iron-doped Y-Ba-Cu-O single crystals. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:233-236. [PMID: 9998239 DOI: 10.1103/physrevb.44.233] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Tiernan WM, Hallock RB. Temperature- and field-dependent I-V characteristics of an Ag/YBa2Cu3O7- delta fiber. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 43:10508-10516. [PMID: 9996776 DOI: 10.1103/physrevb.43.10508] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Kim Y, Lam QH, Jeffries CD. Magnetic-field dependence of the ac susceptibility in granular YBa2Cu3O7: Data and models. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 43:11404-11407. [PMID: 9996883 DOI: 10.1103/physrevb.43.11404] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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López D. Anisotropic energy dissipation in high-Tc ceramic superconductors: Local-field effects. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 43:11478-11480. [PMID: 9996906 DOI: 10.1103/physrevb.43.11478] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Babic E, Prester M, Drobac D, Marohnic Z, Bisup N. Intrinsic variation of the intergrain critical current in polycrystalline YBa2Cu3O7-x. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 43:1162-1165. [PMID: 9996313 DOI: 10.1103/physrevb.43.1162] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Gusmo MA, Mors PM. Fluctuation conductivity of inhomogeneous superconductors: A fractal aggregation model. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:10030-10034. [PMID: 9995257 DOI: 10.1103/physrevb.42.10030] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Peterson RL, Ekin JW. Critical-current diffraction patterns of grain-boundary Josephson weak links. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:8014-8018. [PMID: 9994967 DOI: 10.1103/physrevb.42.8014] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Lam QH, Kim Y, Jeffries CD. Nonlinear electrodynamics in granular YBa2Cu3O7: Measurements and models of complex permeability. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:4846-4849. [PMID: 9996037 DOI: 10.1103/physrevb.42.4846] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Leemann C, Flückiger P, Marsico V, Gavilano JL, Srivastava PK, Lerch P, Martinoli P. Percolative behavior of the superconductive transition of YBa2Cu3O7 films. PHYSICAL REVIEW LETTERS 1990; 64:3082-3085. [PMID: 10041890 DOI: 10.1103/physrevlett.64.3082] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Wilkins R, Amman M, Soltis RE, Ben-Jacob E, Jaklevic RC. Tunneling spectroscopy study of YBa2Cu3O7 thin films using a cryogenic scanning tunneling microscope. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 41:8904-8911. [PMID: 9993229 DOI: 10.1103/physrevb.41.8904] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Sobolewski R. Critical-current suppression in microwave-irradiated granular high-Tc films. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 41:6558-6563. [PMID: 9992903 DOI: 10.1103/physrevb.41.6558] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Durand PP, Ungar LH. Prediction of decoupling in high-temperature superconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 41:815-818. [PMID: 9992831 DOI: 10.1103/physrevb.41.815] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Hampshire DP, Ikeda JA, Chiang Y. Scaling law and flux pinning in polycrystalline La1.85Sr0.15CuO4. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 40:8818-8827. [PMID: 9991363 DOI: 10.1103/physrevb.40.8818] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Jeffries CD, Lam QH, Kim Y, Kim CM, Zettl A, Klein MP. Nonlinear electrodynamics in the granular superconductor YBa2Cu3O7: Experiments and interpretation. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 39:11526-11537. [PMID: 9947984 DOI: 10.1103/physrevb.39.11526] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Goldschmidt D. Critical currents and current-voltage characteristics in superconducting ceramic YBa2Cu3O7- delta. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 39:9139-9146. [PMID: 9947642 DOI: 10.1103/physrevb.39.9139] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Li Q, Rigby KW, Rzchowski MS. Temperature-, magnetic-field-, and power-dependent microwave resistance of YBa2Cu3O7- delta. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 39:6607-6611. [PMID: 9947301 DOI: 10.1103/physrevb.39.6607] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Thompson JR, Brynestad J, Kroeger DM, Kim YC, Sekula ST, Christen DK, Specht ED. Superconductivity, intergrain, and intragrain critical current densities of materials. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 39:6652-6659. [PMID: 9947308 DOI: 10.1103/physrevb.39.6652] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Lam QH, Jeffries CD. Harmonic generation and flux quantization in granular superconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 39:4772-4775. [PMID: 9948853 DOI: 10.1103/physrevb.39.4772] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Limits of the critical current density of polycrystalline high-temperature superconductors based on the current transport properties of single grain boundaries. ACTA ACUST UNITED AC 1989. [DOI: 10.1007/bf01313619] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Shimizu E, Ito D. Critical current density obtained from particle-size dependence of magnetization in YBa2Cu3O7- delta powders. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 39:2921-2923. [PMID: 9948579 DOI: 10.1103/physrevb.39.2921] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Dersch H, Blatter G. New critical-state model for critical currents in ceramic high-Tc superconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 38:11391-11404. [PMID: 9946020 DOI: 10.1103/physrevb.38.11391] [Citation(s) in RCA: 100] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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