| 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 |
| Issue: | 0 |
| Start Page: | 561 |
| End Page: | 565 |
| DOI: | 10.1016/j.tsf.2013.02.017 |
| WEB-link: | http://www.sciencedirect.com/science/article/pii/S0040609013002666 |
| 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) |
