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

Savaskan, Burcu; Koparan, Ezgi Taylan; Çelık, Şükrü; Öztürk, K.; Yanmaz, E.

doi:10.1016/j.physc.2014.04.032

Cited by 29 publications

(11 citation statements)

References 18 publications

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“…Our previous study showed that a-axis parameter decreased from 3.0876 to 3.0565 Å with increasing malic acid amount, and C substitution caused reduction in the grain size, as evidenced by the increase in the FWHM in XRD and SEM. In the literature, the variation of axis parameters is attributed to the C substitution at the boron sites, with the C coming from decomposition of C 4 H 6 O 5 at the time of reaction because of the difference between B and C radius [15,18,21,22]. In the Fig.…”

Section: Resultsmentioning

confidence: 98%

“…In the measurement temperature at 32 K (Fig. 4c), the pure sample exhibits higher lateral force value than malic-acid-added samples because of flux flow in higher temperature which induces the decreasing of superconductivity properties [18].…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, we used the two-step reaction method for the sample preparation. A more detailed procedure of sample preparation, the mechanism of chemical reaction between Mg, B, C 4 H 6 O 5 and C 7 H 8 , and the results of the structural measurements have been previously reported in our former paper [18]. Magnetization measurements (M-T and M-H) of samples were carried out using Quantum Design PPMS-9T system.…”

Section: Methodsmentioning

confidence: 99%

“…In addition, the effects of malic acid addition (from 0 to 15 wt% of the total MgB 2 ) on the vertical levitation force of MgB 2 bulk superconductors have been investigated for first time [18].…”

Section: Introductionmentioning

confidence: 99%

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Effect of $$\hbox {C}_{4}\hbox {H}_{6}\hbox {O}_{5 }$$ C 4 H 6 O 5 Adding on the Critical Current Density and Lateral Levitation Force of Bulk $$\hbox {MgB}_{2}$$ MgB 2

et al. 2015

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We fabricated malic acid (C 4 H 6 O 5 )-added MgB 2 bulks by wet mixing and "Two-step solid state reaction method". The effects of adding malic acid on T c , J c − H behaviour and lateral levitation force (F x ) features of bulk MgB 2 have been investigated. A systematic decrease in the critical temperature T c with increasing adding level confirms the substitution of C at the B site of MgB 2 . While the 4 wt% sample showed the best J c of 3.7 × 10 4 A/cm 2 at 4 T and 5 K, 15 wt% sample showed uncompetitive lower critical current density (J c ), which ascribes the poor connectivity due to the excessive unsubstituted C distribution at grain boundaries and the presence of high MgO amount. At 24 and 28 K, the 4 and 6 wt% malic-acid-added samples exhibit a higher lateral force than pure sample. Based on the observed values of M-H, J c (H) and lateral levitation force (F x ), it can be concluded that the 4 wt% malic-acidadded sample is the best of the studied samples.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of $$\hbox {C}_{4}\hbox {H}_{6}\hbox {O}_{5 }$$ C 4 H 6 O 5 Adding on the Critical Current Density and Lateral Levitation Force of Bulk $$\hbox {MgB}_{2}$$ MgB 2

et al. 2015

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“…The force measurement is done by varying the distance HTS-PM and therefore many types of measurement systems have been designed to measure the force in one, two or three spatial dimensions [22][23][24]. Important characteristics of the superconductors like critical currents, magnetization, etc., can be deduced from these measurements [25,26]. However, since both the levitation and suspension phenomena in an HTS-PM system are determined when the interaction force has the opposite direction to gravity, which compensates the weight of the HTS or the PM, the most common measurement of this type of interaction is the one performed vertically [27].…”

Section: Introductionmentioning

confidence: 99%

Levitation and Suspension Forces Measurement System for High Tc Superconductors

Rojas

Arias

Mariño

2020

Momento

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The interaction forces, attraction (suspension) and repulsion (levitation) between a permanent magnet and different bulk Yttrium-based superconductors were carried out with an automatic system developed in our group, which is reproducible, reliable and low cost. Two superconducting samples of YBa 2 Cu 3 O 7−δ (YBCO) prepared by solid-state reaction method (S) and by the melt-textured growth method (MTG) were used. Both samples were characterized by XRD technique and presented the characteristic peaks and intensity relations of the YBCO-123 superconducting phase. Oxygen deficiencies δ > 0,15 and δ < 0,10 for the S and MTG samples respectively, were observed. Both samples displayed different hysteresis behavior in the Force (F ) vs. Distance (z) measurements when they were field cooled (FC) and zero field cooled (ZFC). This behavior agrees with hysteresis loops observed in magnetization measurements. Both levitation and suspension phenomena were observed in the MTG sample with large hysteresis loops of the force. On the contrary, the S sample with small hysteresis loops did not show a suspension force, only displayed a slight levitation force.

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Effects of Bi-2212 addition on the levitation force properties of bulk MgB2 superconductors

et al. 2016

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

Cited by 29 publications

References 18 publications

Effect of $$\hbox {C}_{4}\hbox {H}_{6}\hbox {O}_{5 }$$ C 4 H 6 O 5 Adding on the Critical Current Density and Lateral Levitation Force of Bulk $$\hbox {MgB}_{2}$$ MgB 2

Effect of $$\hbox {C}_{4}\hbox {H}_{6}\hbox {O}_{5 }$$ C 4 H 6 O 5 Adding on the Critical Current Density and Lateral Levitation Force of Bulk $$\hbox {MgB}_{2}$$ MgB 2

Levitation and Suspension Forces Measurement System for High Tc Superconductors

Effects of Bi-2212 addition on the levitation force properties of bulk MgB2 superconductors

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