Equilibrium first-order melting and second-order glass transitions of the vortex matter in Bi2Sr2CaCu2O8.
Phys Rev Lett
; 95(25): 257004, 2005 Dec 16.
Article
em En
| MEDLINE
| ID: mdl-16384498
ABSTRACT
The thermodynamic phase diagram of Bi2Sr2CaCu2O8 was mapped by measuring local equilibrium magnetization M(H,T) in the presence of vortex shaking. Two equally sharp first-order magnetization steps are revealed in a single temperature sweep, manifesting a liquid-solid-liquid sequence. In addition, a second-order glass transition line is revealed by a sharp break in the equilibrium M(T) slope. The first- and second-order lines intersect at intermediate temperatures, suggesting the existence of four phases Bragg glass and vortex crystal at low fields, glass and liquid at higher fields.
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Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2005
Tipo de documento:
Article