Investigation on the levitation force behaviour of malic acid added bulk MgB2 superconductors

•The effects of malic acid addition on the levitation force properties of bulk MgB2 has been first time investigated and reported.•The malic acid adding has a positive impact on the levitation properties.•4wt% and 6wt% malic acid added samples exhibited a higher vertical and lateral force than pure...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2014-07, Vol.502, p.63-69
Main Authors: Savaskan, B., Taylan Koparan, E., Celik, S., Ozturk, K., Yanmaz, E.
Format: Article
Language:English
Subjects:
Attractive and repulsive force
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Levitation force
Magnetic properties
Malic acid adding
MgB2 superconductor
Physics
Properties of type I and type II superconductors
Superconductivity
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Summary:•The effects of malic acid addition on the levitation force properties of bulk MgB2 has been first time investigated and reported.•The malic acid adding has a positive impact on the levitation properties.•4wt% and 6wt% malic acid added samples exhibited a higher vertical and lateral force than pure sample. The effects of malic acid addition (from 0 to 15wt% of the total MgB2) on the levitation force properties of bulk MgB2 have been investigated. All samples were prepared from magnesium powder, amorphous boron powder, malic acid (C4H6O5) and toluene (C7H8) by using two-step solid state reaction method. Vertical and lateral levitation force measurements that are under both zero-field-cooled (ZFC) and field-cooled (FC) regimes were carried out at different temperatures of 24, 28 and 32K for samples with various adding level. It was found that the reasonable malic acid adding has a positive impact on the levitation properties. At 24K and 28K, the 4wt% and 6wt% malic acid added samples exhibits a higher levitation force than pure sample. In the case of the optimally additive 4wt% sample, the maximum levitation force corresponds to 18.60N, whereas the pure sample shows 16.95N at 24K for ZFC regime. In this study the enhancing effect of malic acid adding on the levitation force properties of MgB2 has been first time investigated and reported.
ISSN:0921-4534
1873-2143
DOI:10.1016/j.physc.2014.04.032