Effect of annealing on magnetic properties and silicide formation at Co/Si interface

Bulletin of materials science

V Ganesan¹  I P Jain²  A K Tyagi³  Shivani Agarwal² 

[1] DAE-UGC Consortium for Scientific Research, Khandwa Road, Indore 452 017, India$$DAE-UGC Consortium for Scientific Research, Khandwa Road, Indore 452 017, IndiaDAE-UGC Consortium for Scientific Research, Khandwa Road, Indore 452 017, India$$;Centre for Non-Conventional Energy Resources, University of Rajasthan, Jaipur 302 004, India$$Centre for Non-Conventional Energy Resources, University of Rajasthan, Jaipur 302 004, IndiaCentre for Non-Conventional Energy Resources, University of Rajasthan, Jaipur 302 004, India$$;Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India$$Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, IndiaIndira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India$$

关键词: Interfaces;    solid state mixing;    metal silicide MOKE;    SIMS;    AFM.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The interaction of Co (30 nm) thin films on Si (100) substrate in UHV using solid state mixing technique has been studied. Cobalt was deposited on silicon substrate using electron beam evaporation at a vacuum of 4 Ã�? 10^-8 Torr having a deposition rate of about 0.1 Ã�?/s. Reactivity at Co/Si interface is important for the understanding of silicide formation in thin film system. In the present paper, cobalt silicide films were characterized by atomic force microscopy (AFM) and secondary ion mass spectroscopy (SIMS) in terms of the surface and interface morphologies and depth profile, respectively. The roughness of the samples was found to increase up to temperature, 300°C and then decreased with further rise in temperature, which was due to the formation of crystalline CoSi₂ phase. The effect of mixing on magnetic properties such as coercivity, remanence etc at interface has been studied using magneto optic Kerr effect (MOKE) techniques at different temperatures. The value of coercivity of pristine sample and 300°C annealed sample was found to be 66 Oe and 40 Oe, respectively, while at high temperature i.e. 748°C, the hysteresis disappears which indicates the formation of CoSi₂ compound.

【 授权许可】

Unknown