Peak effect at microwave frequencies in swift heavy ion irradiated YBa2Cu3O7-δthin films - investigation of vortex dynamics

2001 ◽  
Vol 689 ◽  
Author(s):  
Tamalika Banerjee ◽  
A. R. Bhangale ◽  
P. Raychaudhuri ◽  
D. Kanjilal ◽  
R. Pinto
Keyword(s):  
Vortex Dynamics ◽  
Surface Resistance ◽  
Flux Line ◽  
Heavy Ion ◽  
Peak Effect ◽  
Microwave Surface Resistance ◽  
Line Lattice ◽  
Microwave Frequencies ◽  
Columnar Defects ◽  
Pronounced Peak

ABSTRACTThe vortex dynamics at microwave frequencies in YBa2Cu3O7-δ(YBCO) films has been studied. We observe a peak in the microwave surface resistance Rs vs. T (temperature) plots at 4.88 GHz in some films in magnetic fields (upto 0.8 T) whereas a few films do not show a pronounced peak in their surface resistance. This is associated with the ‘peak-effect’ phenomenon and reflects the order-disorder transformation of the flux-line lattice near the transition temperature. Introduction of artificial pinning centers like columnar defects as a result of irradiation with 200 MeV Ag ion leads to the suppression of the peak in films exhibiting the ‘peak-effect’. Interestingly, a peak is seen to develop in those films that initially did not show a peak in the surface resistance before irradiation. These results and the dynamics of the vortices at microwave frequencies for the unirradiated and irradiated films will be discussed.

Stepwise amorphization of the flux-line lattice inCa3Rh4Sn13:A peak-effect study

2000 ◽  
Vol 61 (18) ◽  
pp. 12394-12403 ◽  
Author(s):  
S. Sarkar ◽  
D. Pal ◽  
S. S. Banerjee ◽  
S. Ramakrishnan ◽  
A. K. Grover ◽  
...  
Keyword(s):  
Flux Line ◽  
Peak Effect ◽  
Effect Study ◽  
Line Lattice ◽  
Flux Line Lattice

Peak effect and anomalous flow behavior of a flux-line lattice

1994 ◽  
Vol 49 (14) ◽  
pp. 10005-10008 ◽  
Author(s):  
S. Bhattacharya ◽  
M. J. Higgins
Keyword(s):  
Flow Behavior ◽  
Flux Line ◽  
Peak Effect ◽  
Line Lattice ◽  
Flux Line Lattice

scholarly journals Peak effect in Ca3Rh4Sn13: vortex phase diagram and evidences for stepwise amorphization of flux line lattice

2000 ◽  
Vol 341-348 ◽  
pp. 1085-1086 ◽  
Author(s):  
S. Sarkar ◽  
S.S. Banerjee ◽  
A.K. Grover ◽  
S. Ramakrishnan ◽  
S. Bhattacharya ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Flux Line ◽  
Peak Effect ◽  
Line Lattice ◽  
Flux Line Lattice ◽  
Vortex Phase Diagram ◽  
Vortex Phase

Mechanisms of flux line lattice motion in a peak effect superconductor

1975 ◽  
Vol 53 (5) ◽  
pp. 410-412 ◽  
Author(s):  
B.D. Lauterwasser ◽  
E.J. Kramer
Keyword(s):  
Flux Line ◽  
Peak Effect ◽  
Line Lattice ◽  
Flux Line Lattice

Reentrant Peak Effect and Melting of a Flux Line Lattice in 2H-NbSe2

1996 ◽  
Vol 76 (24) ◽  
pp. 4600-4603 ◽  
Author(s):  
K. Ghosh ◽  
S. Ramakrishnan ◽  
A. K. Grover ◽  
Gautam I. Menon ◽  
Girish Chandra ◽  
...  
Keyword(s):  
Flux Line ◽  
Peak Effect ◽  
Line Lattice ◽  
Flux Line Lattice

Angular dependences of the motion of the anisotropic flux line lattice and the peak effect in MgB2

2008 ◽  
Vol 21 (12) ◽  
pp. 125004
Author(s):  
D-J Jang ◽  
H-S Lee ◽  
B Kang ◽  
H-G Lee ◽  
M-H Cho ◽  
...  
Keyword(s):  
Flux Line ◽  
Peak Effect ◽  
Line Lattice ◽  
Flux Line Lattice

scholarly journals Structure and Correlations of the Flux Line Lattice in Crystalline Nb through the Peak Effect

1998 ◽  
Vol 80 (4) ◽  
pp. 833-836 ◽  
Author(s):  
P. L. Gammel ◽  
U. Yaron ◽  
A. P. Ramirez ◽  
D. J. Bishop ◽  
A. M. Chang ◽  
...  
Keyword(s):  
Flux Line ◽  
Peak Effect ◽  
Line Lattice ◽  
Flux Line Lattice

scholarly journals Anomalous peak effect inCeRu2and2H−NbSe2:Fracturing of a flux line lattice

1998 ◽  
Vol 58 (2) ◽  
pp. 995-999 ◽  
Author(s):  
S. S. Banerjee ◽  
N. G. Patil ◽  
S. Saha ◽  
S. Ramakrishnan ◽  
A. K. Grover ◽  
...  
Keyword(s):  
Flux Line ◽  
Peak Effect ◽  
Line Lattice ◽  
Flux Line Lattice ◽  
Anomalous Peak

scholarly journals Microwave Response of Nanostructured High-Tc Superconductor Thin Films

2019 ◽  
Vol 64 (10) ◽  
pp. 969
Author(s):  
P. A. Borisenko ◽  
A. O. Pokusinskii ◽  
A. L. Kasatkin
Keyword(s):  
Surface Resistance ◽  
Dielectric Material ◽  
Structural Defects ◽  
Microwave Response ◽  
Microwave Surface Resistance ◽  
High Tc ◽  
Microwave Frequencies ◽  
High Tc Superconductor ◽  
Superconductor Thin Films ◽  
Abrikosov Vortices

A model for the microwave response of a nanostructured high-Tc superconductor (HTS) film, with implanted nanoparticles and nanorods of a dielectric material or point-like and columnar irradiation defects with a nano-sized cross-section is developed. In this case, the microwave surface resistance Rs(T,H,ω) is calculated both for the Meissner and mixed states of a superconductor film in an applied dc magnetic field. The obtained results indicate that the implantation of dielectric nanoparticles or point-like radiation defects can significantly improve superconductor characteristics at microwave frequencies. Namely, these nano-sized structural defects can decrease the surface resistance in the Meissner state and eliminate the oscillations of Abrikosov vortices and the related microwave energy losses, thus decreasing the contribution of Abrikosov vortices to the Rs value in the mixed state of a HTS film.

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