TY - JOUR
T1 - Irreversibility field above 14 T at 77 K in (Nd-Eu-Gd) Ba2Cu3Oy
AU - Muralidhar, M.
AU - Sakai, N.
AU - Jirsa, M.
AU - Murakami, M.
N1 - Funding Information:
Manuscript received August 5, 2002. This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications.
PY - 2003/6
Y1 - 2003/6
N2 - In (Nd0.33 Eu0.38 Gd0.28) Ba2 a new type of nanometer-scale pinning center was created by choosing an appropriate matrix chemical ratio. Such a pinning center could be controlled via externally added small quantity of 211 (NEG-211 or Gd-211) secondary phase. Microstructure analysis combined with magnetic characterization clarified that the sample with a high irreversibillty field always exhibits chemical modulation and formation of a special nanometer-scale lamellar structure. High magnification STM observations revealed that the nano-Iamellas consist of rows of aligned NEG-rich clusters 3 to 4 nm in size. This new material with the Nd:Eu:Gd ratio of 1:1.25:0.85 combined with 5 mol% 211 secondary phase exhibits the high secondary peak position at around 4.5 T and the irreversibility field over 14 T at 77 K for Ha ∥ c-axis.
AB - In (Nd0.33 Eu0.38 Gd0.28) Ba2 a new type of nanometer-scale pinning center was created by choosing an appropriate matrix chemical ratio. Such a pinning center could be controlled via externally added small quantity of 211 (NEG-211 or Gd-211) secondary phase. Microstructure analysis combined with magnetic characterization clarified that the sample with a high irreversibillty field always exhibits chemical modulation and formation of a special nanometer-scale lamellar structure. High magnification STM observations revealed that the nano-Iamellas consist of rows of aligned NEG-rich clusters 3 to 4 nm in size. This new material with the Nd:Eu:Gd ratio of 1:1.25:0.85 combined with 5 mol% 211 secondary phase exhibits the high secondary peak position at around 4.5 T and the irreversibility field over 14 T at 77 K for Ha ∥ c-axis.
KW - Critical current density
KW - Flux pinning
KW - Melt-processed bulk materials
KW - STM
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U2 - 10.1109/TASC.2003.812111
DO - 10.1109/TASC.2003.812111
M3 - Conference article
AN - SCOPUS:0042475635
SN - 1051-8223
VL - 13
SP - 3091
EP - 3094
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 2 III
T2 - 2002 Applied Superconductivity Conference
Y2 - 4 August 2002 through 9 August 2002
ER -