Room temperature ferromagnetism in Co-doped La0.5Sr0.5TiO3−δ nanoparticles

Kwanruthai Wongsaprom, Ekaphan Swatsitang, Santi Maensiri, Somkait Srijaranai, Supapan Seraphin

doi:10.1063/1.2724772

Room temperature ferromagnetism in Co-doped La0.5Sr0.5TiO3−δ nanoparticles

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Kwanruthai Wongsaprom

Khon Kaen University Integrated Nanotechnology Research Center (INRC) and Small and Strong Materials Group (SSMG), Department of Physics, Faculty of Science, , Khon Kaen 40002, Thailand
Ekaphan Swatsitang

Khon Kaen University Integrated Nanotechnology Research Center (INRC) and Small and Strong Materials Group (SSMG), Department of Physics, Faculty of Science, , Khon Kaen 40002, Thailand
Santi Maensiri

Khon Kaen University Integrated Nanotechnology Research Center (INRC) and Small and Strong Materials Group (SSMG), Department of Physics, Faculty of Science, , Khon Kaen 40002, Thailand
Somkait Srijaranai

Khon Kaen University Department of Chemistry, Faculty of Science, , Khon Kaen 40002, Thailand
Supapan Seraphin

The University of Arizona Department of Materials Science and Engineering, , Tucson, Arizona 85721

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説明

<jats:p>The authors report room temperature ferromagnetism in La0.5Sr0.5Ti0.985Co0.015O3−δ nanoparticles with particle sizes of ∼12–14nm. Nanoparticles of undoped and Co-doped samples were synthesized by a polymerized complex method and were characterized using x-ray diffraction and transmission electron microscopy. The magnetic properties of the nanoparticles were determined using vibrating sample magnetometry. The undoped samples exhibit a diamagnetic behavior, whereas all the Co-doped samples are ferromagnetic having the specific magnetizations of ∼0.011–0.038emu∕g at 10kOe. The finding of room temperature ferromagnetism in the Co-doped samples would allow an enhanced flexibility for applications.</jats:p>