Effective Artificial Pinning Center Introduction on MgB2 Superconducting Bulks (2017)
- Authors:
- USP affiliated authors: RODRIGUES JUNIOR, DURVAL - EEL ; SILVA, LUCAS BARBOZA SARNO DA - EEL
- Unidade: EEL
- Sigla do Departamento: LOM
- Assunto: SUPERCONDUTIVIDADE
- Language: Inglês
- Abstract: Since the discovery of the MgB2 as a superconducting material in 2001, many groups around the world work on an attempt to improve the transport properties for technologic application. Defects in superconducting materials can be an efficient mechanism to improve the transport properties due to the pinning of the magnetic flux lines penetrating in the material under an applied magnetic field. In the presentwork it is described amethodology to optimize the critical current densities inMgB2 bulk superconductors. The method uses the mixture of the MgB2 superconductor with addition of VB2, which has the same C32 hexagonal structure of the MgB2, in an attempt to introduce crystalline defects in the MgB2 superconducting matrix. Defects in the material can act as an effective pinning center, enhancing the transport properties of the superconducting. The mechanical mixture of the powders, obtained by ball milling, was important to improve densification and grain boundary connectivity, and has a positive influence on the final crystalline structure, maintaining the hexagonal structure of thematrix, and generating intragranular and intergranular pinning centers. Magnetic superconducting characterization using PPMSwas performed and showed an improvement of the critical current densities. Optical analysiswas realized using amicro-Raman, and the E2g phonon(responsible for the strong electron-phonon ctinhooupling) was analyzed. Microstructural characterizations, performed using SEM,TEM,HRTEM and XRD,were extremely important to determine the distribution and compositional characterization of the defects in the material.
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ABNT
SILVA, Lucas Barboza Sarno da e RODRIGUES JR, Durval. Effective Artificial Pinning Center Introduction on MgB2 Superconducting Bulks. 2017, Anais.. [S.l.]: UFRN, 2017. Disponível em: https://orbi.uliege.be/bitstream/2268/212035/1/AbstractBook-VORTEX2017-24may2017.pdf. Acesso em: 25 fev. 2026. -
APA
Silva, L. B. S. da, & Rodrigues Jr, D. (2017). Effective Artificial Pinning Center Introduction on MgB2 Superconducting Bulks. In 16th International Workshop on Vortex Matter in Superconductors (Vortex2017). UFRN. Recuperado de https://orbi.uliege.be/bitstream/2268/212035/1/AbstractBook-VORTEX2017-24may2017.pdf -
NLM
Silva LBS da, Rodrigues Jr D. Effective Artificial Pinning Center Introduction on MgB2 Superconducting Bulks [Internet]. 16th International Workshop on Vortex Matter in Superconductors (Vortex2017). 2017 ;[citado 2026 fev. 25 ] Available from: https://orbi.uliege.be/bitstream/2268/212035/1/AbstractBook-VORTEX2017-24may2017.pdf -
Vancouver
Silva LBS da, Rodrigues Jr D. Effective Artificial Pinning Center Introduction on MgB2 Superconducting Bulks [Internet]. 16th International Workshop on Vortex Matter in Superconductors (Vortex2017). 2017 ;[citado 2026 fev. 25 ] Available from: https://orbi.uliege.be/bitstream/2268/212035/1/AbstractBook-VORTEX2017-24may2017.pdf - Study of NbB2 addition on the superconducting behavior of MgB2 bulks
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