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The magnetic characterization of Fe doped TiO₂ semiconducting oxide nanoparticles synthesized by sol–gel method

Lookup NU author(s): Naglaa Nasralla, Professor Lidija Siller

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Abstract

In this work Fe doped TiO₂ nanoparticles were synthesized at different Fe/Ti molar ratio from 1% to 5% by sol-gel technique. The post annealing of the samples was carried out at T= 400, 600, and 800C. HRTEM of the samples revealed that the mean size of the nanoparticles increases from about 8 nm to about 100 nm as the annealing temperature increased. SQUID magnetometry of 1% and 5% Fe doped TiO₂ has shown mixed ferromagnetic and paramagnetic phases within the crystal while ferromagnetic order with T_c about 350 K was only observed in 5% Fe:TiO₂ sample annealed at T=800^o C. The oxygen vacancy mediated ferromagnetic (FM) interaction could be responsible for the observed FM.

Publication metadata

Author(s): Yeganeh M, Shahtahmasebi N, Kompany A, Karimipour M, Razavi F, Nasralla NHS, Siller L

Publication type: Article

Publication status: Published

Journal: Physica B: Condensed Matter

Year: 2017

Volume: 511

Pages: 89-98

Print publication date: 15/04/2017

Online publication date: 11/02/2017

Acceptance date: 09/02/2017

Date deposited: 10/02/2017

ISSN (print): 0921-4526

ISSN (electronic): 1873-2135

Publisher: Elsevier BV

URL: http://dx.doi.org/10.1016/j.physb.2017.02.010

DOI: 10.1016/j.physb.2017.02.010

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