Growth of single-domain (Sm[sub 0.5]Eu[sub 0.5])Ba[sub 2]Cu[sub 3]O[sub 7-δ] with high T[sub c] and J[sub c] by employing a thermal gradient

Hu, A.; Sakai, N.; Murakami, M.
April 2001
Applied Physics Letters;4/23/2001, Vol. 78 Issue 17, p2539
Academic Journal
Bulk (Sm[sub 0.5]Eu[sub 0.5])Ba[sub 2]Cu[sub 3]O[sub 7-δ] superconductors were grown isothermally and with a vertical thermal gradient of -5 °C/cm in air. The crystals grown at a large growth rate under the thermal gradient exhibited a high-T[sub c] value of 95 K and a plateau in the J[sub c]-B curve at 1-4 T at 77 K with postannealing in Ar. We found that the substitution of Ba by rare-earth (RE) elements could be suppressed with a large growth rate. The narrow range of RE-Ba solid solution was attributed to the fast crystallization rate of RE[sub 1+x]Ba[sub 2-x]Cu[sub 3]O[sub 7-δ] with low-x values. © 2001 American Institute of Physics.


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