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Magneto-optical setup for in situ strain and transport measurements on superconductors
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View: Figures


Image of FIG. 1.
FIG. 1.

Normalized radial and vertical magnetic field components as a function of the distance to the center of the sample holder.

Image of FIG. 2.
FIG. 2.

Optical path inside the microscope.

Image of FIG. 3.
FIG. 3.

Overview of the different parts of the MO He flow cryostat. (1) Liquid He entry. (2) Thermometers and voltage wires output. (3) Current wires. (4) He gas output. (5) Thermal screening. (6) Sample holder. (7) External hull. (8) Magnetic coil ( diameter).

Image of FIG. 4.
FIG. 4.

Algorithm for quantitative field maps obtention.

Image of FIG. 5.
FIG. 5.

Schematic view of the experimental strain apparatus. (1) External screw for strain application. (2) Current wires. (3) Inox clamps. (4) He tank. (5) Sample holder.

Image of FIG. 6.
FIG. 6.

Schematic view of the MO garnet placed on a superconducting sample.

Image of FIG. 7.
FIG. 7.

CC typical patterning and preparation for a MO experiment under axial stress. (1) voltage taps, (2) current taps, (3) wide and long bridge, (4) strain gage, and (5) Pt-100 temperature sensor.

Image of FIG. 8.
FIG. 8.

MO images (zero field cooled, , ) of the DyBCO CC patterned sample. The sample edge is at the bottom. The strain application direction is indicated by the black arrows. One bridge ( wide) among 20 is used for transport experiments. Left: 0.175% relative elongation. Right: 0.185% relative elongation.

Image of FIG. 9.
FIG. 9.

Critical current at as a function of relative elongation for the bridge indicated on Fig. 8.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Magneto-optical setup for in situ strain and transport measurements on superconductors