Seong, Won Kyung Ranot, Mahipal Lee, Ji Yeong Yang, Cheol-Woong Lee, Jae Hak Oh, Young Hoon Ahn, Jae-Pyoung Kang, Won Nam 2024-01-20T04:32:14Z 2024-01-20T04:32:14Z 2021-09-05 2016-04 0953-2048 https://pubs.kist.re.kr/handle/201004/124203 We report for the first time the growth and the systematic study of the growth mechanism for flower-like MgB2 structures fabricated on the substrates for solid-state electronics by the hybrid physical-chemical vapor deposition (HPCVD) technique. The MgB2 flower has a width of 30 mu m and a height of 10 mu m. The superconductivity of MgB2 flowers was confirmed by a magnetization measurement, and the transition temperature is 39 K, which is comparable with high-quality bulk samples. The excellent current-carrying capability was demonstrated by MgB2 flowers. To understand the nucleation and growth mechanism of MgB2 flowers a very systematic study was performed by a high-resolution transmission electron microscope (HRTEM) and atom probe (AP) microscopy. The HRTEM revealed that the seed grain of a MgB2 flower has a [10 (1) over bar0] direction, and the flower is composed of micro-columnar MgB2 grains having pyramidal tips and which are grown along the (0001) plane. A clear understanding of the growth mechanism for MgB2 flowers could lead to the growth of other low-dimensional MgB2 structures for superconducting electronic devices. English IOP PUBLISHING LTD Superconducting MgB2 flowers: growth mechanism and their superconducting properties Article 10.1088/0953-2048/29/4/045015 1 SUPERCONDUCTOR SCIENCE & TECHNOLOGY, v.29, no.4 SUPERCONDUCTOR SCIENCE & TECHNOLOGY 29 4 scie scopus 000372443700027 2-s2.0-84961755073 Physics, Applied Physics, Condensed Matter Physics Article MgB2 flowers growth mechanism superconducting properties