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Self-field AC losses of textured Bi2Sr2CaCu2O8+? thin rods

Self-field AC losses of textured Bi2Sr2CaCu2O8+? thin rods
Self-field AC losses of textured Bi2Sr2CaCu2O8+? thin rods
Self-field AC losses of polycrystalline Bi-2212 thin rods textured by a Laser Floating Zone (LFZ) melting technique have been measured at 77 K. With the optimal processing parameters, these rods, of 1.6–2 mm diameter and 10 cm length, have a transport critical current density of 3 kA/cm2 in the self-field which decreases to about 1.5 kA/cm2 in fields of 0.02 T applied perpendicular to the rod axis. The self-field AC losses have been measured in DC magnetic fields up to 0.03 T. The measurements in zero field show that for a large current range the losses are dominated by hysteresis losses as described by the Critical State Model for a cylinder. For the measurements in DC fields the losses show an increasingly resistive-like dependence with current, while the hysteretic component expected from the CSM becomes less important. Measurements at different frequencies also indicated that the loss per cycle in fields is strongly frequency dependent.
transport ac loss, Bi-2212 fiber, frequency dependence, magnetic field dependence
0921-4534
71-75
Martinez, E.
67ed8d9b-3213-4797-aeae-1c9e6985e48f
Hughes, T.J.
831a1967-aad9-4bc9-bced-1048718ef372
Diez, C.
e1ae5e4d-f2cf-4ffa-b4c9-7fa787bc94b5
Angurel, L.A.
94b4aa21-98e0-468a-b16e-360aff55b5d1
Yang, Y.
0c661323-7e23-41c6-a9a2-b4479fd74ef1
Beduz, C.
15245681-77b5-4b29-a8fc-23296f13bc57
Martinez, E.
67ed8d9b-3213-4797-aeae-1c9e6985e48f
Hughes, T.J.
831a1967-aad9-4bc9-bced-1048718ef372
Diez, C.
e1ae5e4d-f2cf-4ffa-b4c9-7fa787bc94b5
Angurel, L.A.
94b4aa21-98e0-468a-b16e-360aff55b5d1
Yang, Y.
0c661323-7e23-41c6-a9a2-b4479fd74ef1
Beduz, C.
15245681-77b5-4b29-a8fc-23296f13bc57

Martinez, E., Hughes, T.J., Diez, C., Angurel, L.A., Yang, Y. and Beduz, C. (1998) Self-field AC losses of textured Bi2Sr2CaCu2O8+? thin rods. Physica C: Superconductivity And its Applications, 310 (1-4), 71-75. (doi:10.1016/S0921-4534(98)00436-5).

Record type: Article

Abstract

Self-field AC losses of polycrystalline Bi-2212 thin rods textured by a Laser Floating Zone (LFZ) melting technique have been measured at 77 K. With the optimal processing parameters, these rods, of 1.6–2 mm diameter and 10 cm length, have a transport critical current density of 3 kA/cm2 in the self-field which decreases to about 1.5 kA/cm2 in fields of 0.02 T applied perpendicular to the rod axis. The self-field AC losses have been measured in DC magnetic fields up to 0.03 T. The measurements in zero field show that for a large current range the losses are dominated by hysteresis losses as described by the Critical State Model for a cylinder. For the measurements in DC fields the losses show an increasingly resistive-like dependence with current, while the hysteretic component expected from the CSM becomes less important. Measurements at different frequencies also indicated that the loss per cycle in fields is strongly frequency dependent.

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More information

Published date: 1998
Keywords: transport ac loss, Bi-2212 fiber, frequency dependence, magnetic field dependence

Identifiers

Local EPrints ID: 21284
URI: https://eprints.soton.ac.uk/id/eprint/21284
ISSN: 0921-4534
PURE UUID: 8f8a2a58-a444-4ed0-832b-7676cb2b6d15

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Date deposited: 17 Nov 2006
Last modified: 17 Jul 2017 16:26

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Contributors

Author: E. Martinez
Author: T.J. Hughes
Author: C. Diez
Author: L.A. Angurel
Author: Y. Yang
Author: C. Beduz

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