IODINE AND BROMINE INTERCALATION INTO THE BI-2222 PHASE OF BI2SR2(GD0.82CE0.18)2CU2O10+DELTA

Authors
KOIKE Y HISAKI T SASAKI K FUJIWARA A NOJI T SAITO Y
Citation
Y. Koike et al., IODINE AND BROMINE INTERCALATION INTO THE BI-2222 PHASE OF BI2SR2(GD0.82CE0.18)2CU2O10+DELTA, Physica. C, Superconductivity, 224(1-2), 1994, pp. 31-37
Citations number
17
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
224
Issue
1-2
Year of publication
1994
Pages
31 - 37
Database
ISI
SICI code
0921-4534(1994)224:1-2<31:IABIIT>2.0.ZU;2-R
Abstract
We have succeeded in synthesizing a new intercalation compound Bi2Sr2( Gd0.82Ce0.18)2Cu2O10+deltaI with stage-1 structure. The increase in sp acing between the BiO-BiO double layers through the iodine intercalati on is 3.7 angstrom. The electrical resistivity and superconductivity h ave been investigated for iodine-intercalated samples of Bi2Sr2(Gd0.82 Ce0.18)2Cu2O10+deltaIx with 0 less-than-or-equal-to x less-than-or-equ al-to 1 and bromine-intercalated ones of Bi2Sr2(Gd0.82Ce0.18)2Cu2O10+d eltaBxr with 0 less-than-or-equal-to x less than or similar to 0.2. It has been found that non-superconducting assintered samples of Bi2Sr2( Gd0.82Ce0.18)2Cu2O10+delta become superconducting at low temperatures below about 20 K through the light bromine intercalation. This suggest s that the role of annealing under high pressures of oxygen in the app earance of superconductivity for the Bi-2222 phase is to supply the Cu O2 sheets with enough hole carriers.