Physical Properties of Holmium Promoted Superconductivity in Nd-Doped YBCO HTC-Superconductors

Morsy Abou SEKKINA; Abdul Raouf TAWFIK; Osama HEMEDA

Makale detayları

Physical Properties of Holmium Promoted Superconductivity in Nd-Doped YBCO HTC-Superconductors

Yazarlar:

Morsy Abou SEKKINA | Abdul Raouf TAWFIK | Osama HEMEDA

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Physics 2005 Vol.29 Issue 6, pp.329-340

Belge Tipi:

Makale

Yayın Tarihi:

5/2005

Belge Dili:

Türkçe

Document ID (Org No.):

2000761446

Sıklık:

İki Aylık

eISSN:

1303-6122

pISSN:

1300-0101

Anahtar kelimeler:

Superconductors; X-ray; IR-spectra; YBCO; Ho; Nd.

Özet:

 

Samples of the nominal composition (Y0.5Nd0.5-xHox)  Ba2Cu3O7- d , 0 \le x \le 0.5, have been prepared  using the conventional solid state reaction.  The effect of holmium  and neodymium substitution on electrical resistivity, transition  temperature Tc, lattice parameters, size of crystallite and grain  size has been investigated.  X-ray diffraction, electron micro-probe,  scanning electron microscope and IR spectra, have been used in our  investigation.  The results show that the transition temperature Tc,  electron-hole jump rate and lattice parameters (a, b) have minimum  values at x = 0.2, while c increases to maximum at x = 0.2.  The size  of crystallite, the electrical resistivity and grain size are also  maximum at x = 0.2.  The real composition, molecular state and  electronic state of the prepared samples are discussed.

 

Samples of the nominal composition (Y0.5Nd0.5-xHox)  Ba2Cu3O7- d , 0 \le x \le 0.5, have been prepared  using the conventional solid state reaction.  The effect of holmium  and neodymium substitution on electrical resistivity, transition  temperature Tc, lattice parameters, size of crystallite and grain  size has been investigated.  X-ray diffraction, electron micro-probe,  scanning electron microscope and IR spectra, have been used in our  investigation.  The results show that the transition temperature Tc,  electron-hole jump rate and lattice parameters (a, b) have minimum  values at x = 0.2, while c increases to maximum at x = 0.2.  The size  of crystallite, the electrical resistivity and grain size are also  maximum at x = 0.2.  The real composition, molecular state and  electronic state of the prepared samples are discussed.

Makale detayları

Physical Properties of Holmium Promoted Superconductivity in Nd-Doped YBCO HTC-Superconductors

Yazarlar: Morsy Abou SEKKINA | Abdul Raouf TAWFIK | Osama HEMEDA

Yayıncı: TUBITAK

Dergi: Turkish Journal of Physics 2005 Vol.29 Issue 6, pp.329-340

Belge Tipi: Makale

Yayın Tarihi: 5/2005

Belge Dili: Türkçe

Document ID (Org No.): 2000761446

Sıklık: İki Aylık

eISSN: 1303-6122

pISSN: 1300-0101

Superconductors; X-ray; IR-spectra; YBCO; Ho; Nd.

Sayı

Yazarlar:

Morsy Abou SEKKINA | Abdul Raouf TAWFIK | Osama HEMEDA

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Physics 2005 Vol.29 Issue 6, pp.329-340

Belge Tipi:

Makale

Yayın Tarihi:

5/2005

Belge Dili:

Türkçe

Document ID (Org No.):

2000761446

Sıklık:

İki Aylık

eISSN:

1303-6122

pISSN:

1300-0101