Naslov
3D XY Scalling of the Irreversibilty Line of YBa_2Cu_3O_7 Crystals

Autori
Cooper, J.R. ; Loram, J.W. ; Johnson, J.D.

Izvornik
Physical Review Letters (0031-9007) 79 (1997), 9; 1730-1733

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Sažetak
We find experimentally that the irreversibility line, H_{irr}(T), and the reversible magnetizaion of twinned YBa_2Cu_3O_7 crystals both show 3D XY scaling, which suggests a common origin for both quantities. Analysis if this resault and a correlation between the condensation energy and H_{irr}(T) of oxygen deficient YBa_2Cu_3O_(7-delta) for 0<delta<0.6 implies that H_{irr}(T) is strongly influenced by critical fluctuations. It is possible that these values of H_{irr}(T) and the recently discovered vortex melting line, H_{m}(T), both correspond to an upper critical field line which has been suppresed by thermodynamic fluctuations.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA