TY - JOUR
T1 - Magnetic field distribution in superconducting composites as revealed by ESR-probe and magnetization
AU - Davidov, D.
AU - Bontemps, N.
AU - Golosovsky, M.
AU - Waysand, G.
PY - 1998/3/1
Y1 - 1998/3/1
N2 - The distribution of a static magnetic field in superconductor-insulator composites consisting of BSCCO (YBCO) powder in paraffin wax is studied by ESR bulk probing and magnetization. The average field and field variance in the non-superconducting host are measured as function of temperature and volume fraction of superconductor. We develop a model of the field distribution in dilute magnetic and superconducting composites that relates the field inhomogeneity to magnetization and particle shape. We find that this model satisfactorily describes field distribution in our superconducting composites in the regime of strong flux pinning, i.e. below irreversibility line. We find deviations from the model above the irreversibility line and attribute this to flux motion. We show that the field distribution in superconducting composites is determined not only by magnetization and particle shape, but is strongly affected by the flux profile within the superconducting particles.
AB - The distribution of a static magnetic field in superconductor-insulator composites consisting of BSCCO (YBCO) powder in paraffin wax is studied by ESR bulk probing and magnetization. The average field and field variance in the non-superconducting host are measured as function of temperature and volume fraction of superconductor. We develop a model of the field distribution in dilute magnetic and superconducting composites that relates the field inhomogeneity to magnetization and particle shape. We find that this model satisfactorily describes field distribution in our superconducting composites in the regime of strong flux pinning, i.e. below irreversibility line. We find deviations from the model above the irreversibility line and attribute this to flux motion. We show that the field distribution in superconducting composites is determined not only by magnetization and particle shape, but is strongly affected by the flux profile within the superconducting particles.
KW - ESR-probing
KW - Inhomogeneous magnetic field distribution
KW - Superconducting composites
UR - http://www.scopus.com/inward/record.url?scp=0346937836&partnerID=8YFLogxK
U2 - 10.1016/S0921-4534(97)01857-1
DO - 10.1016/S0921-4534(97)01857-1
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AN - SCOPUS:0346937836
SN - 0921-4534
VL - 297
SP - 111
EP - 123
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - 1-2
ER -