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Title: Amplitude and frequency dependence of hysteresis loss in a magnet-superconductor levitation system

Abstract

Using an electromagnetically controlled mechanical pendulum, we measured the energy loss for different amplitudes in a magnetic levitation system that contained high temperature superconductors (HTSs). Two procedures were followed to measure losses at 77 K for frequencies of 93.8 mHz to 80 Hz. In the first procedure, the distance between the permanent magnet and the HTS levitator was the same as that during (field) cooling. In the second procedure, the magnet was lowered (after cooling) closer to the HTS levitator before the measurements were performed. The experimental data show that these two procedures give essentially the same results at the same distance despite different cooling (and magnetization) histories for melt-textured YBaCuO levitators, and the frequency-independent energy loss is a power-law function of amplitude. We attribute the energy loss to magnetic hysteresis in the superconductor. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

Authors:
; ;  [1];  [2]
  1. Argonne National Laboratory, Argonne, Illinois 60439 (United States)
  2. Department of Physics, Northern Illinois University, DeKalb, Illinois 60115 (United States)
Publication Date:
OSTI Identifier:
76403
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 78; Journal Issue: 3; Other Information: PBD: 1 Aug 1995
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; HIGH-TC SUPERCONDUCTORS; LEVITATION; MAGNETS; YTTRIUM OXIDES; BARIUM OXIDES; COPPER OXIDES; HYSTERESIS; ENERGY LOSSES; FREQUENCY DEPENDENCE

Citation Formats

Yang, Z J, Hull, J R, Mulcahy, T M, and Rossing, T D. Amplitude and frequency dependence of hysteresis loss in a magnet-superconductor levitation system. United States: N. p., 1995. Web. doi:10.1063/1.360187.
Yang, Z J, Hull, J R, Mulcahy, T M, & Rossing, T D. Amplitude and frequency dependence of hysteresis loss in a magnet-superconductor levitation system. United States. https://doi.org/10.1063/1.360187
Yang, Z J, Hull, J R, Mulcahy, T M, and Rossing, T D. 1995. "Amplitude and frequency dependence of hysteresis loss in a magnet-superconductor levitation system". United States. https://doi.org/10.1063/1.360187.
@article{osti_76403,
title = {Amplitude and frequency dependence of hysteresis loss in a magnet-superconductor levitation system},
author = {Yang, Z J and Hull, J R and Mulcahy, T M and Rossing, T D},
abstractNote = {Using an electromagnetically controlled mechanical pendulum, we measured the energy loss for different amplitudes in a magnetic levitation system that contained high temperature superconductors (HTSs). Two procedures were followed to measure losses at 77 K for frequencies of 93.8 mHz to 80 Hz. In the first procedure, the distance between the permanent magnet and the HTS levitator was the same as that during (field) cooling. In the second procedure, the magnet was lowered (after cooling) closer to the HTS levitator before the measurements were performed. The experimental data show that these two procedures give essentially the same results at the same distance despite different cooling (and magnetization) histories for melt-textured YBaCuO levitators, and the frequency-independent energy loss is a power-law function of amplitude. We attribute the energy loss to magnetic hysteresis in the superconductor. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.},
doi = {10.1063/1.360187},
url = {https://www.osti.gov/biblio/76403}, journal = {Journal of Applied Physics},
number = 3,
volume = 78,
place = {United States},
year = {Tue Aug 01 00:00:00 EDT 1995},
month = {Tue Aug 01 00:00:00 EDT 1995}
}