Abstract—The effect of different Na doping levels on structural and electric transport properties of MgB2 bulk samples was investigated. The samples were synthesized by an assisted microwave method using the microwave radiation to heat the powder precursors (Mg and B, high purity) constrained in a stainless steel box. It was found that Na addition induces a small X-ray diffraction peak broadening. Moreover a slight decreasing of the critical temperature and an improvement of both the irreversibility field and the upper critical field are exhibited. The result is almost independent on the doping level. The pinning energy turns out to be higher for the doped samples even if its dependence on current and temperature is the same for doped and undoped samples.

Na substitution effects on MgB2 synthesized with a microwave-assisted technique

AGOSTINO, Angelo;VOLPE, Paolo Edoardo Angelo;TRUCCATO, Marco;CAGLIERO, Stefano;
2007

Abstract

Abstract—The effect of different Na doping levels on structural and electric transport properties of MgB2 bulk samples was investigated. The samples were synthesized by an assisted microwave method using the microwave radiation to heat the powder precursors (Mg and B, high purity) constrained in a stainless steel box. It was found that Na addition induces a small X-ray diffraction peak broadening. Moreover a slight decreasing of the critical temperature and an improvement of both the irreversibility field and the upper critical field are exhibited. The result is almost independent on the doping level. The pinning energy turns out to be higher for the doped samples even if its dependence on current and temperature is the same for doped and undoped samples.
17 (2)
2774
2777
Magnesium diboride; doping effect; structural characterization; flux pinning; microwave synthesis
AGOSTINO A; PANETTA M; VOLPE P; TRUCCATO M; CAGLIERO S; GOZZELINO L; GERBALDO R; GHIGO G; LAVIANO F; LOPARDO G; MINETTI B
File in questo prodotto:
File Dimensione Formato  
ISI - 2007_IEEE TRANS_Na substitution effects on MgB2 synthesized with a microwave-assisted technique.pdf

Accesso riservato

Tipo di file: PDF EDITORIALE
Dimensione 790.47 kB
Formato Adobe PDF
790.47 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2318/42750
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 9
  • ???jsp.display-item.citation.isi??? 9
social impact