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Transport properties of sealed MgB2/Fe/Ni multifilamentary wires heat treated in air |
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| Authors: | KM DevadasS Rahul Syju ThomasNeson Varghese K VinodU Syamaprasad S PradhanMK Chattopadhyay SB Roy |
| Affiliation: | a National Institute for Interdisciplinary Science and Technology (CSIR),Trivandrum 695019, India b Institute for Plasma Research, Gandhinagar 382428, India c Magnetic & Superconducting Materials Section, Raja Ramanna Centre for Advanced Technology, Indore 452013, India |
| Abstract: | Ni sheathed multifilamentary MgB2 wires with Fe barrier and Cu stabilizer were prepared by the in situ Powder-In-Tube (PIT) method. After rolling, the ends of the wires were sealed by a simple capping technique and the wires were directly heat treated in air, without vacuum or any inert atmosphere. The quality of the wires was assessed by analysing the phase assemblage and measurement of superconducting properties such as R-T, JC-T and JC-H. Phase analysis revealed that only traces of MgO was formed in the superconductor core. Typical multifilamentary wires prepared by this method showed a TC ≈ 38.5 K and ΔTC ≈ 1 K and JC of the order of 105 A/cm2 at 6 K (0 T) and 104 A/cm2 at 4.2 K (6 T) respectively. These values are quite comparable with the values obtained for wires heat treated in inert atmosphere. |
| Keywords: | 74 70 Ad 74 25 F&minus 74 25 Sv |
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