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Magnetic Properties of a Melt-Textured Pellet of (Nd_{0.33}Eu_{0.38}Gd_{190.28})Ba_2Cu_3O_y + 0.035 mol% Zn

100%

Jirsa M., Rameš M., Muralidhar M.

Acta Physica Polonica A

2008

vol. 113

issue 1

223-226

Recently, a striking positive effect of tiny Zn doping on crystal growth quality has been found in melt-textured (Nd, Eu, Gd)Ba_2Cu_3O_y pellets. The material could be easily grown from MgO seed, possessing a rather high lattice mismatch to the superconducting compound. In the present work we study spatial distribution of local magnetic properties and chemical composition of a (Nd_{0.33}Eu_{0.38}Gd_{0.28})Ba_2Cu_3O_y + 0.035 mol% Zn pellet. The plane cutting the pellet into two halves along the symmetry axes of the opposite a-axis growth sectors is investigated. While the chemical composition only slightly fluctuates, magnetic properties show quite an interesting spatial variation.

Reversible Magnetization of Melt-Processed NEG-123 Superconductor

88%

Jirsa M., Rameš M., Muralidhar M., Kacmarcik J., Marcenat C.

Acta Physica Polonica A

2010

vol. 118

issue 5

1022-1023

Specific heat of superconducting electrons was measured in a melt-processed (Nd_{0.33}Eu_{0.38}Gd_{0.28})Ba_2Cu_3O_{y} superconductor (NEG-123) with 5 mol% of Gd-211, 1 wt% Ag, and 0.035 mol% of Zn. The thermodynamic characteristics of this compound are still not well known. From calorimetric measurements the reversible magnetization, critical fields, penetration depth, and coherence length were deduced. In the vicinity of T_{c}, the reversible magnetic moment was additionally measured by means of SQUID.

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2 Acta Physica Polonica A

1 2010

1 2008

2 Jirsa M.

2 Muralidhar M.

2 Rameš M.

1 Kacmarcik J.

1 Marcenat C.

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Magnetic Properties of a Melt-Textured Pellet of (Nd_{0.33}Eu_{0.38}Gd_{190.28})Ba_2Cu_3O_y + 0.035 mol% Zn

Reversible Magnetization of Melt-Processed NEG-123 Superconductor