We report room-temperature ferromagnetism in ∼11.4-14.6 nm nanoparticles of La0.5 Sr0.5 Ti0.985 Fe0.015 O3-δ. Nanoparticles of undoped and Fe-doped samples were synthesized by a polymerized complex method and were characterized using x-ray diffraction, transmission electron microscopy, and vibrating-sample magnetometer. The undoped samples exhibit a diamagnetic behavior, whereas the Fe-doped samples are ferromagnetic having the specific magnetizations of 0.041-0.101 emug at 10 kOe. Our results indicate that the ferromagnetic property of La0.5 Sr0.5 Ti0.985 Fe0.015 O3-δ system is intrinsic and is not a result of any secondary magnetic phase or cluster formation. The finding of room-temperature ferromagnetism in this system would stimulate further interest in the area of diluted magnetic oxides.
ASJC Scopus subject areas
- Physics and Astronomy(all)