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Magnetization and Microwave Study of Superconducting MgB2 (CROSBI ID 94752)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Dulčić, Antonije ; Paar, Dalibor ; Požek, Miroslav ; Williams, Grant V. M. ; Krämer, Steffen Magnetization and Microwave Study of Superconducting MgB2 // Physical review. B, Condensed matter and materials physics, 66 (2002), 1; 014505, 7. doi: 10.1103/PhysRevB.66.014505

Podaci o odgovornosti

Dulčić, Antonije ; Paar, Dalibor ; Požek, Miroslav ; Williams, Grant V. M. ; Krämer, Steffen

engleski

Magnetization and Microwave Study of Superconducting MgB2

We report magnetic-field-dependent magnetization and microwave impedance measurements on a MgB2 superconductor prepared by high-pressure synthesis. We find that the upper critical field is linearly dependent on temperature near T-c and the dc irreversibility field exponent is similar to1.4. Microwave surface impedance measurements were carried out in applied magnetic fields up to 8 T. The low-field data show an absence of weak links in the superconducting state. By inverting the surface impedance data, we find a vortex depinning frequency that decreases with increasing magnetic field, which is characteristic of collective pinning.

critical-current density ; upper critical-field ; high-pressure ; penetration depth ; vortex dynamics ; temperature ; films ; transport ; frequency ; cavity ; microwave

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Podaci o izdanju

66 (1)

2002.

014505

7

objavljeno

1098-0121

1550-235X

10.1103/PhysRevB.66.014505

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Fizika

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