Abstract
We report the effects of oxygen pressure during growth () on the electronic and magnetic properties of PrAlO3 films grown on -terminated SrTiO3 substrates. Resistivity measurements show an increase in the sheet resistance as is increased. The saturation of the sheet resistance down to 0.3 K is consistent with Kondo theory for torr. Resistivity data fits indicate Kondo temperatures of 16–18 K. For the sample, we measured a moderate positive magnetoresistance (MR) due to a strong spin–orbit (SO) interaction at low magnetic fields that evolves into a larger negative MR at high fields due to the Kondo effect. Analysis of the MR data permitted the extraction of the SO interaction critical field for the torr interface ( T). We observed high positive MR for the least oxygenated sample, where a fraction of the n-type carriers are derived from oxygen vacancies and possible cation interdiffusion; for this torr sample, Hall effect data indicate a thick conducting layer. Its extremely high MR (∼) is attributed to classical behavior due to a distribution of mobilities.
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.
