Abstract
Magnetoresistive Sr2FeMoO6 thin films were grown by pulsed laser deposition with three different thicknesses 150 nm, 270 nm and 500 nm. Structural, magnetic and magneto-transport properties of the films were measured. Structural properties showed that impurity phases are formed when the film thickness exceed limiting thickness over 300 nm. Otherwise no major differences were observed in structural and magnetic properties between the films. The semiconductive upturn was observed in all ρ(T) curves, but it was notably smaller for the two thickest films. At 350 K the magnetoresistive (MR) behaviour was very similar for all the films, but at 10 K the negative MR was clearly largest for the thickest film and also the shape of the curve in low fields deviated from others.
Highlights
Double perovskite Sr2FeMoO6 (SFMO) is an extremely interesting material having high potential for spintronic and magnetoresistive applications
The challenges in the SFMO thin film fabrication are due to extreme preparation conditions and formed impurity phases [5,6, 8,9,10]
Earlier we have reported SFMO thin films with no indication of different orientations or impurity phases made with pulsed laser deposition (PLD) in Ar/H2(5%) atmosphere and at 1050◦C deposition temperature [5]
Summary
Double perovskite Sr2FeMoO6 (SFMO) is an extremely interesting material having high potential for spintronic and magnetoresistive applications. It is half-metallic resulting in 100 % spin polarized charge carriers and it has one of the highest Curie temperatures, TC, among half metals, around 410-450 K [1,2,3,4]. The challenges in the SFMO thin film fabrication are due to extreme preparation conditions and formed impurity phases [5,6, 8,9,10]. Earlier we have reported SFMO thin films with no indication of different orientations or impurity phases made with PLD in Ar/H2(5%) atmosphere and at 1050◦C deposition temperature [5]. More commonly used deposition atmosphere is oxygen [8, 11,12,13], but it has been shown that an oxygen backround pressure higher than 10−4 mbar leads to impurity phases [8]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
