Dense-plasma-driven ultrafast formation of FePt organization on silicon substrate

Bulletin of materials science

ROHIT MEDWAL¹  R S RAWAT²  NEERU SEHDEV³  S ANNAPOORNI³  WANG YING² 

[1]Kyushu Institute of Technology, Iizuka, Fukuoka 8208502, Japan$$Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, Singapore 637616, Singapore$$Kyushu Institute of Technology, Iizuka, Fukuoka 8208502, JapanKyushu Institute of Technology, Iizuka, Fukuoka 8208502, Japan$$Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, Singapore 637616, Singapore$$Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, Singapore 637616, SingaporeKyushu Institute of Technology, Iizuka, Fukuoka 8208502, Japan$$Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, Singapore 637616, Singapore$$

[2]Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, Singapore 637616, Singapore$$Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, Singapore 637616, SingaporeNatural Sciences and Science Education, National Institute of Education, Nanyang Technological University, Singapore 637616, Singapore$$

[3]Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India$$Department of Physics and Astrophysics, University of Delhi, Delhi 110007, IndiaDepartment of Physics and Astrophysics, University of Delhi, Delhi 110007, India$$

关键词: Nanostructures;    chemical synthesis;    magnetic materials;    phase transition.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

This article demonstrates the removal of organic capping and promotion of long-range 2D organization of chemically synthesized FePt nanoparticles dispersed on Si$langle 100angle$ substrate by means of pulsed H+ energetic ion irradiation using a dense plasma focus (DPF) device. The irradiation of energetic H$^+$ ions on FePt nanoparticles clearly resulted in enhanced structural and magnetic behaviour of the FePt nanoparticles as a function ofplasma focused irradiation shots. Transmission electron microscopy (TEM)/scanning electron microscopy (SEM) images of the FePt nanoparticles clearly show a marked enhancement in average particle size from 2.5 nm for nonirradiated sample to about 28nm for four plasma focus shots irradiation. The gradual removal of organic capping over chemically synthesized FePt nanoparticles with increasing plasma focus shots exposure is confirmed usingRaman spectroscopy. A uniform 2D organization of bimetallic FePt nanoparticles over 1 cm $imes$ 1 cm silicon substrate is obtained with three plasma focus shots with better magnetic properties as compared with plasma-untreated FePtnanoparticles.

【 授权许可】

Unknown