Investigations on the temperature dependent electrical and magnetic properties of NiTiO{sub 3} by molten salt synthesis

Journal Article · Fri Mar 15 04:00:00 EDT 2013 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2012.12.001· OSTI ID:22290385

Yuvaraj, S.; Nithya, V. D.; Fathima, K. Saiadali ^[1]; Sanjeeviraja, C. ^[2]; Selvan, G. Kalai; Arumugam, S. ^[3]

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1. Solid State Ionics and Energy Devices Laboratory, Department of Physics, Bharathiar University, Coimbatore 641 046 (India)
2. School of Physics, Alagappa University, Karaikudi 630 004 (India)
3. Centre for High pressure Research, School of Physics, Bharathidasan University, Tiruchirappalli 620 024 (India)

Highlights: ► NiTiO{sub 3} particles were synthesized by simple molten salt technique. ► The single phase compound formation was confirmed through XRD analysis. ► The detailed impedance properties of NiTiO{sub 3} were studied at elevated temperature. ► The conductance spectra were fitted using Jonscher Power Law. ► Low temperature magnetization behaviour was explained by core shell model. - Abstract: Submicron-sized NiTiO{sub 3} particles were successfully synthesized by simple molten salt method. The phase purity and crystal structure was confirmed through X-ray diffraction. The characteristics bands of Ni-O and Ti-O were identified using Fourier Transform Infra-red spectrum. The SEM and TEM images shows that the particles are lying in the range of 150–300 nm and selected area electron diffraction pattern (SAED) infers the single crystalline nature of NiTiO{sub 3}. The impedance spectra elucidate the grain interior conducting mechanism and semi-conducting nature of NiTiO{sub 3} at elevated temperatures. The frequency dependent conductance spectra were found to obey Jonscher's power law and a maximum value of conductivity observed was 2 × 10{sup −5} S cm{sup −1} at 520 °C. The magnetic susceptibility measurement infers the antiferromagnetic behavior with the Neel temperature (T{sub N}) of 14.9 K. The increase in coercivity below T{sub N} reveals the coexistence of antiferromagnetic with superparamagnetic behavior. B–H curve represents the first order phase transition from antiferromagnetic to ferromagnetic transition.

• OSTI ID: 22290385
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 3 Vol. 48; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANTIFERROMAGNETISM
ELECTRON DIFFRACTION
INDIUM FLUORIDES
MAGNETIC SUSCEPTIBILITY
MOLTEN SALTS
NEEL TEMPERATURE
PARTICLES
SYNTHESIS
X-RAY DIFFRACTION