Magnetic phase diagram of type-II superconductors: From high Tc to low Tc superconductors

2008 ◽  
Vol 468 (15-20) ◽  
pp. 1245-1248 ◽  
Author(s):  
D. Li ◽  
P.J. Lin ◽  
B. Rosenstein
Keyword(s):  
Phase Diagram ◽  
Magnetic Phase ◽  
Magnetic Phase Diagram ◽  
Type Ii ◽  
High Tc ◽  
Type Ii Superconductors

Vortex Structure: Lattice, Glass, or Liquid?

1989 ◽  
Vol 169 ◽  
Author(s):  
Robert J. Soulen ◽  
Stuart A. Wolf
Keyword(s):  
Magnetic Field ◽  
Phase Diagram ◽  
Vortex Structure ◽  
Cuprate Superconductors ◽  
Magnetic Phase ◽  
Magnetic Phase Diagram ◽  
Type Ii ◽  
Type Ii Superconductors

AbstractRecent measurements of the dissipation in cuprate superconductors in a magnetic field have been interpreted as providing evidence for the presence of new phases in type II superconductors: flux liquids or flux glasses. We suggest that a more conventional interpretation in terms of the electrodynamics of vortices can adequately account for all the observations. Based on this model, we propose a magnetic phase diagram.

Magnetic phase diagram of a single crystal of the electron-doped high Tc superconductor Pr1.85Ce0.15CuO4−y

1997 ◽  
Vol 230-232 ◽  
pp. 832-834
Author(s):  
M.C. de Andrade ◽  
G. Triscone ◽  
M.B. Maple ◽  
S. Spagna ◽  
J. Diederichs ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Single Crystal ◽  
Magnetic Phase ◽  
Magnetic Phase Diagram ◽  
High Tc ◽  
High Tc Superconductor

The Magnetic Phase Diagram of High Tc Superconductors

MRS Bulletin ◽  
1990 ◽  
Vol 15 (6) ◽  
pp. 50-54 ◽  
Author(s):  
A.P. Malozemoff
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Phase Diagram ◽  
Magnetic Phase ◽  
Mean Field ◽  
Magnetic Phase Diagram ◽  
Transition Line ◽  
Type Ii ◽  
Field Phase ◽  
Type Ii Superconductor

Among the many surprises in the held of high temperature superconductivity, new features discovered in the magnetic phase diagram are among the most exciting and controversial, generating many new physical concepts and impacting practical applications. This brief review complements several other recent reviews and refers mostly to the bulk crystal (not ceramic) Y1Ba2Cu3O7 and Bi2Sr2Ca1Cu2Ox materials, from now on denoted YBaCuO and BiSrCaCuO.The magnetic phase diagram of a conventional type II superconductor as a function of magnetic held H and temperature T is well known and understood in the mean-field Ginzburg-Landau and London theories. As shown in Figure 1a, a Meissner phase characterized by complete flux exclusion appears at low fields, delineated by a mean-field phase transition line called the lower critical field Hc1(T), which increases linearly with decreasing temperature below Tc and then saturates at low temperature. A second mean-field phase transition line, called the upper critical field Hc2(T), delineates the transition between the normal and superconducting states and shows a T-dependence similar to Hc1(T). In a strongly type II superconductor (in which the penetration depth λ is much larger than the coherence length ξ), the large region intervening between Hc1 and Hc2 is called the Abrikosov mixed phase. Here magnetic field penetrates the superconductor in the form of tubes of magnetic field called flux lines or vortices. In an ideal isotropic superconductor, these vortices self-organize into a hexagonal array. Defects disturb the hexagonal long-range order, causing the array to break up into a kind of glassy state with more or less short-range order.

Magnetic Phase Diagram and Superconductivity in High-Tc(La1-xBax)2CuO4

1988 ◽  
Vol 57 (3) ◽  
pp. 734-736 ◽  
Author(s):  
Yoshio Kitaoka ◽  
Kenji Ishida ◽  
Shigeru Hiramatsu ◽  
Kunisuke Asayama
Keyword(s):  
Phase Diagram ◽  
Magnetic Phase ◽  
Magnetic Phase Diagram ◽  
High Tc

MAGNETIC PHASES OF JOSEPHSON VORTEX IN STRONGLY ANISOTROPIC High-Tc SUPERCONDUCTORS

2007 ◽  
Vol 21 (18n19) ◽  
pp. 3357-3363
Author(s):  
KAZUTO HIRATA
Keyword(s):  
Magnetic Field ◽  
Phase Diagram ◽  
Flow Resistance ◽  
Magnetic Phase ◽  
Magnetic Phase Diagram ◽  
Josephson Vortex ◽  
High Tc Superconductors ◽  
High Tc ◽  
The Magnetic Field ◽  
Ordered State

When a magnetic field is applied parallel to the superconducting layers in high-Tc superconductors (HTSCs), vortices become Josphson vortices (JVs). To study the magnetic phase diagram of JVs in strongly anisotropic HTSCs, we propose that the JV flow-resistance measurement is a powerful probe to observe periodic oscillations in the JV flow-resistance against the magnetic field. We could determine the magnetic phase diagram of JVs in Bi -2212, in which there exist a three-dimensionally-ordered state and a two-dimensionally quasi-ordered one.

NEUTRON DIFFRACTION AND MAGNETIZATION STUDY OF THE MAGNETIC PHASE DIAGRAM OF UAs0.75Se0.25 SINGLE CRYSTAL

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-479-C8-480 ◽  
Author(s):  
M. Kuznietz ◽  
P. Burlet ◽  
J. Rossat-Mignod ◽  
O. Vogt ◽  
K. Mattenberger ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Neutron Diffraction ◽  
Single Crystal ◽  
Magnetic Phase ◽  
Magnetic Phase Diagram ◽  
Magnetization Study

MAGNETIC PROPERTIES OF PSEUDO-BINARY Mn1−xFexSn2 ALLOYS

1993 ◽  
Vol 07 (01n03) ◽  
pp. 867-870 ◽  
Author(s):  
H. SHIRAISHI ◽  
T. HORI ◽  
Y. YAMAGUCHI ◽  
S. FUNAHASHI ◽  
K. KANEMATSU
Keyword(s):  
Field Theory ◽  
Phase Diagram ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
High Temperature ◽  
Magnetic Structure ◽  
Magnetic Phase ◽  
Magnetic Phase Diagram ◽  
Molecular Field ◽  
Magnetic Phases

The magnetic susceptibility measurements have been made on antiferromagnetic compounds Mn1–xFexSn2 and the magnetic phase diagram was illustrated. The high temperature magnetic phases I and III, major phases, were analyzed on the basis of molecular field theory and explained the change of magnetic structure I⇌III occured at x≈0.8.

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