Effect of carbon ion implantation on the superconducting properties of MgB2 bulks prepared by powder-in-sealed-tube method

IF 1.8 3区工程技术 Q3 PHYSICS, APPLIED Cryogenics Pub Date : 2024-11-28 DOI:10.1016/j.cryogenics.2024.103994

J.S. Hansdah , P.M. Sarun , K. Asokan

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Abstract

We studied the effect of carbon (C) ion implantation on the microstructure and superconducting properties of bulk MgB₂ prepared by the powder-in-sealed-tube (PIST) method. FESEM and TEM analysis indicate microstructural changes due to carbon ion implantation. DC magnetization measurements reveal a slight improvement of T_C and small ΔT_C values due to ion implantation. The J_C(B) characteristics of implanted samples show a significant enhancement of J_C compared with pristine MgB₂ at 10 and 20 K. MgB₂ samples implanted with 80 keV carbon ions with a dose of 2 × 10¹⁶ ions cm⁻² show maximum enhancement in J_C i.e., 2.07 × 10⁵ A/cm² at 5 T and 10 K. The flux pinning force density curves are theoretically analyzed using the Dew-Hughes model. The results reveal that significant enhancements in the flux pinning properties are contributed by the normal point defects caused by carbon ion implantation, which acts as a strong pinning center.

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来源期刊

Cryogenics 物理-热力学

CiteScore

3.80

自引率

9.50%

发文量

审稿时长

2.1 months

期刊介绍： Cryogenics is the world''s leading journal focusing on all aspects of cryoengineering and cryogenics. Papers published in Cryogenics cover a wide variety of subjects in low temperature engineering and research. Among the areas covered are: - Applications of superconductivity: magnets, electronics, devices - Superconductors and their properties - Properties of materials: metals, alloys, composites, polymers, insulations - New applications of cryogenic technology to processes, devices, machinery - Refrigeration and liquefaction technology - Thermodynamics - Fluid properties and fluid mechanics - Heat transfer - Thermometry and measurement science - Cryogenics in medicine - Cryoelectronics