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Hydrothermal synthesis and characterization of rod-like co-doped anatase for spintronic applications

S. N. VALSAN1, I. A. TUDOR1, V. BADILITA1, B. VASILE2, O. RAITA3,* , R.-R. PITICESCU1

Affiliation

  1. National R&D Institute for Non-Ferrous and Rare Metals, 102 Biruintei Blvd., CP 077145, Pantelimon, Ilfov, Romania
  2. University POLITEHNICA Bucharest, Faculty of Applied Chemistry and Materials Science, 313 Splaiul Independentei Str., 060042 Bucharest, Romania
  3. National Institute for R&D of Isotopic and Molecular Technologies, 65-103 Donath Str., Cluj-Napoca, 400293 Romania

Abstract

Nanopowders based on Co-doped TiO2 anatase with homogeneous distribution of doping agents were obtained by kinetic controlled hydrothermal process in the presence of KOH as mineralizing agent. The rod-like structure may be explained by the formation in the initial phase of Potassium Hydrogen Titanium Oxide Hydrate that transforms with further increasing of hydrothermal treatment time to more stable anatase. The EPR investigations show two ferromagnetic behaviors: in the low temperature range 110-160K, the evaluated Curie temperature  value is 110K while in the high temperature range 170-230K a value of 165K is obtained. The results support the great potential for further applications in spintronics..

Keywords

Hydrothermal synthesis, Co-doped anatase, Nanosize particles, EPR.

Citation

S. N. VALSAN, I. A. TUDOR, V. BADILITA, B. VASILE, O. RAITA, R.-R. PITICESCU, Hydrothermal synthesis and characterization of rod-like co-doped anatase for spintronic applications, Optoelectronics and Advanced Materials - Rapid Communications, 7, 11-12, November-December 2013, pp.1011-1014 (2013).

Submitted at: Sept. 11, 2013

Accepted at: Nov. 7, 2013