publication . Article . 2017

Calculation of Normalized Pinning Force and Nature of Pinning Mechanism for Nano-Al Doped MgB2 Superconductor

Ansari, Intikhab A.;
Open Access English
  • Published: 03 Feb 2017 Journal: Journal of Modern Materials (issn: 2456-4834, eissn: 2456-4834, Copyright policy)
  • Publisher: AIJR Publisher
Abstract
The Jc(H) of nano-Al doped MgB2 samples has been calculated from M(H) loop measurements at different temperatures. Normalized volume pinning forces as a function of the reduced field have been analyzed at different temperatures and doping level which was taken from the Jc(H) data. The modified scaling law was used as discussed by the Eisterer to analyze the pinning forces. This law was compared with the scaling law used by the Fietz and co-worker.  The grain boundary pinning is found the dominant pinning mechanism in all the doped samples and exhibit the scaling behavior. The XRD and temperature dependence of resistivity confirms the successful substitution...
Subjects
arxiv: Condensed Matter::Superconductivity
Related Organizations
31 references, page 1 of 3

Polyanskii, “High-Tc superconducting materials for electric power applications,” Nature, vol. 414, no.

6861, pp. 368-377, Nov. 2001.

M. A. Susner et al., “Influence of Mg/B ratio and SiC doping on microstructure and high field transport Jc in MgB2 strands,” Phys. C Supercond., vol. 456, no. 1, pp. 180-187, 2007.

Tarantini, and E. Lehmann, “Observation of the I. A. Ansari, J. Mod. Mater.; Vol. 3 Issue 1, pp:33-40, January 2017 [17] [18] Crossover from Two-Gap to Single-Gap Superconductivity through Specific Heat Measurements in Neutron-Irradiated MgB2,” Phys.

Rev. Lett., vol. 96, no. 7, p. 77003, Feb. 2006.

Müller, and L. Schultz, “Improved superconducting properties in nanocrystalline bulk MgB2,” Appl. Phys.

Lett., vol. 80, no. 15, pp. 2725-2727, Apr. 2002.

K. P. Singh et al., “Nano Fe3O4 Induced Fluxoid Jumps and Low Field Enhanced Critical Current Density in MgB2 Superconductor,” J. Supercond. Nov. Magn., vol. 21, no. 1, pp. 39-44, Jan. 2008.

I. A. Ansari et al., “The effect of nano-alumina on structural and magnetic properties of MgB2 superconductors,” Supercond. Sci. Technol., vol. 20, no. 8, pp. 827-831, Aug. 2007.

S. X. Dou et al., “Enhancement of the critical current density and flux pinning of MgB2 superconductor by nanoparticle SiC doping,” Appl. Phys. Lett., vol. 81, no.

18, pp. 3419-3421, Oct. 2002.

Matsumoto, and H. Kitaguchi, “Critical current densities of powder-in-tube MgB2 tapes fabricated with nanometer-size Mg powder,” Appl. Phys. Lett., vol. 84, no. 10, pp. 1728-1730, Mar. 2004.

M. Shahabuddin, I. A. Ansari, N. S. Alzayed, K. A. Ziq, and A. F. Salem, “Effect of Nano ZnO Doping on the Nature of Pinning of MgB2 Superconductors,” J.

Supercond. Nov. Magn., vol. 26, no. 5, pp. 1547-1552, May 2013.

W. A. Fietz and W. W. Webb, “Hysteresis in Superconducting Alloys-Temperature and Field Dependence of Dislocation Pinning in Niobium Alloys,” Phys. Rev., vol. 178, no. 2, pp. 657-667, Feb.

31 references, page 1 of 3
Abstract
The Jc(H) of nano-Al doped MgB2 samples has been calculated from M(H) loop measurements at different temperatures. Normalized volume pinning forces as a function of the reduced field have been analyzed at different temperatures and doping level which was taken from the Jc(H) data. The modified scaling law was used as discussed by the Eisterer to analyze the pinning forces. This law was compared with the scaling law used by the Fietz and co-worker.  The grain boundary pinning is found the dominant pinning mechanism in all the doped samples and exhibit the scaling behavior. The XRD and temperature dependence of resistivity confirms the successful substitution...
Subjects
arxiv: Condensed Matter::Superconductivity
Related Organizations
31 references, page 1 of 3

Polyanskii, “High-Tc superconducting materials for electric power applications,” Nature, vol. 414, no.

6861, pp. 368-377, Nov. 2001.

M. A. Susner et al., “Influence of Mg/B ratio and SiC doping on microstructure and high field transport Jc in MgB2 strands,” Phys. C Supercond., vol. 456, no. 1, pp. 180-187, 2007.

Tarantini, and E. Lehmann, “Observation of the I. A. Ansari, J. Mod. Mater.; Vol. 3 Issue 1, pp:33-40, January 2017 [17] [18] Crossover from Two-Gap to Single-Gap Superconductivity through Specific Heat Measurements in Neutron-Irradiated MgB2,” Phys.

Rev. Lett., vol. 96, no. 7, p. 77003, Feb. 2006.

Müller, and L. Schultz, “Improved superconducting properties in nanocrystalline bulk MgB2,” Appl. Phys.

Lett., vol. 80, no. 15, pp. 2725-2727, Apr. 2002.

K. P. Singh et al., “Nano Fe3O4 Induced Fluxoid Jumps and Low Field Enhanced Critical Current Density in MgB2 Superconductor,” J. Supercond. Nov. Magn., vol. 21, no. 1, pp. 39-44, Jan. 2008.

I. A. Ansari et al., “The effect of nano-alumina on structural and magnetic properties of MgB2 superconductors,” Supercond. Sci. Technol., vol. 20, no. 8, pp. 827-831, Aug. 2007.

S. X. Dou et al., “Enhancement of the critical current density and flux pinning of MgB2 superconductor by nanoparticle SiC doping,” Appl. Phys. Lett., vol. 81, no.

18, pp. 3419-3421, Oct. 2002.

Matsumoto, and H. Kitaguchi, “Critical current densities of powder-in-tube MgB2 tapes fabricated with nanometer-size Mg powder,” Appl. Phys. Lett., vol. 84, no. 10, pp. 1728-1730, Mar. 2004.

M. Shahabuddin, I. A. Ansari, N. S. Alzayed, K. A. Ziq, and A. F. Salem, “Effect of Nano ZnO Doping on the Nature of Pinning of MgB2 Superconductors,” J.

Supercond. Nov. Magn., vol. 26, no. 5, pp. 1547-1552, May 2013.

W. A. Fietz and W. W. Webb, “Hysteresis in Superconducting Alloys-Temperature and Field Dependence of Dislocation Pinning in Niobium Alloys,” Phys. Rev., vol. 178, no. 2, pp. 657-667, Feb.

31 references, page 1 of 3
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