TY - JOUR
T1 - Porous vortex matter
AU - Banerjee, S. S.
AU - Zeldov, E.
AU - Soibel, A.
AU - Myasoedov, Y.
AU - Rappaport, M.
AU - Menghini, M.
AU - Fasano, Y.
AU - de la Cruz, F.
AU - van der Beek, C. J.
AU - Konczykowski, M.
AU - Tamegai, T.
PY - 2004/8
Y1 - 2004/8
N2 - Structure, dynamics, and thermodynamic properties of vortex matter in the presence of a low density of columnar defects (CDs) were studied in BSCCO crystals. Magnetic decorations show that when vortices outnumber CDs a heterogeneous vortex matter is formed consisting of two populations of vortices: vortices residing on CDs form a matrix of pinned vortices, whereas the interstitial vortices form ordered crystallites within the `pores' of the matrix. Differential magneto-optical studies reveal that at elevated fields this porous phase melts in two stages, a first-order melting of the crystallites at a temperature considerably higher than the pristine melting, and a continuous melting of the matrix at still higher temperature. At low fields the two transitions occur simultaneously, giving rise to a sharp kink in the observed melting line.
AB - Structure, dynamics, and thermodynamic properties of vortex matter in the presence of a low density of columnar defects (CDs) were studied in BSCCO crystals. Magnetic decorations show that when vortices outnumber CDs a heterogeneous vortex matter is formed consisting of two populations of vortices: vortices residing on CDs form a matrix of pinned vortices, whereas the interstitial vortices form ordered crystallites within the `pores' of the matrix. Differential magneto-optical studies reveal that at elevated fields this porous phase melts in two stages, a first-order melting of the crystallites at a temperature considerably higher than the pristine melting, and a continuous melting of the matrix at still higher temperature. At low fields the two transitions occur simultaneously, giving rise to a sharp kink in the observed melting line.
U2 - 10.1016/j.physc.2004.03.189
DO - 10.1016/j.physc.2004.03.189
M3 - Article
SN - 0921-4534
VL - 408-410
SP - 495
EP - 498
JO - Physica C. Superconductivity and its Applications
JF - Physica C. Superconductivity and its Applications
ER -