Publication details

Authors: Kumar, D.; Sarin, Aarti; Verma, Vikram; Venkatraman, R. 
Title: Pulsed laser deposition assisted fabrication and characterization of FeCo nanoparticles embedded in TiN thin film matrix 
Type: Journal Article 
Publisher: Thin Solid Films 
Year: 2013 
Volume: 534 
Start Page: 561 
End Page: 565 
DOI: 10.1016/j.tsf.2013.02.017 
Abstract: The FeCo material was synthesized in nanoparticle form in a TiN/FeCo/TiN sandwich structure using a pulsed laser deposition (PLD) method. FeCo is significantly cheaper than noble metal based bimetallic materials such as FePt, NiPd, etc. A Fe0.5 Co0.5 composition was chosen in this study which is based on the local spin-density electronic-structure calculations. The advantage of this structure is in-situ passivation of FeCo nanoparticles by TiN thin films which is highly stable against atmospheric ambient conditions. TiN/FeCo/TiN samples with variable FeCo nanoparticle size were made by changing the number of laser pulses impinging on a chemically synthesized composite FeCo target. By controlling the particle size in the confined layers, it was possible to tune the magnetic properties from superparamagnetic to ferromagnetic in a controlled way. Magnetic hysteresis characteristics below the blocking temperature are consistent with single-domain behavior. 
Keywords: Bimetallic nanoparticles, Iron, Cobalt, Single domain magnetic domain, Titanium nitride, Pulsed laser deposition 
File:  (692K)