Phase diagram of a mesoscopic superconducting Pb square: Ballistic Hall magnetometry | Zendy

Koen Vervaeke | Zendy; K. De Keyser | Zendy; Mariela Menghini | Zendy; C. Carballeira | Zendy; G. Borghs | Zendy; V. V. Moshchalkov | Zendy

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Phase diagram of a mesoscopic superconducting Pb square: Ballistic Hall magnetometry

Author(s) -

Koen Vervaeke,

K. De Keyser,

Mariela Menghini,

C. Carballeira,

G. Borghs,

V. V. Moshchalkov

Publication year - 2007

Publication title -

physical review b

Language(s) - English

Resource type - Journals

eISSN - 1538-4489

pISSN - 1098-0121

DOI - 10.1103/physrevb.76.184506

Subject(s) - condensed matter physics , mesoscopic physics , superconductivity , physics , magnetometer , phase diagram , magnetization , hall effect , magnetic field , vortex , ginzburg–landau theory , phase (matter) , quantum mechanics , thermodynamics

Ballistic Hall magnetometry is used to investigate the magnetization of a mesoscopic superconducting Pb square as a function of magnetic field (H) and temperature (T). Vortex penetration and expulsion fields are determined from magnetization curves at different temperatures below Tc and are combined in an experimental T-H phase diagram. Enhanced stability of the symmetry-matching vorticities L=1 and L=4 is observed. The experimental results are compared with theoretical calculations using the nonlinear Ginzburg-Landau theory for a thin square.status: publishe

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