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Unveiling the correlation between structural and magnetic ordering in nano Co1-NiTeO4
Akhilesh Kumar Patel1, S Shanmukharao Samatham2, Ekta Rani3
1Department of Physics, Indian Institute of Technology Bombay, Mumbai 400 076, India.
Physical Chemistry Chemical Physics : PCCP
|January 9, 2023
Summary
Researchers explored cobalt-nickel tellurate (Co$_{1-x}$Ni$_x$TeO$_4$) nanoparticles, finding that higher temperatures promote stable magnetic ordering. This control over structural and magnetic properties opens new avenues for nanomaterial applications.
Area of Science:
- Materials Science
- Nanotechnology
- Magnetism
Background:
- Correlating structure and magnetism in nanomaterials is crucial.
- Controlling magnetic properties at the nanoscale requires precise structural tuning.
Purpose of the Study:
- To investigate the structural and magnetic properties of sol-gel grown cobalt-nickel tellurate (Co$_{1-x}$Ni$_x$TeO$_4$) nanoparticles.
- To understand how calcination temperature influences structural ordering and magnetic behavior.
- To establish a correlation between structural ordering and magnetic phase transitions in these nanomaterials.
Main Methods:
- Sol-gel synthesis of Co$_{1-x}$Ni$_x$TeO$_4$ nanoparticles (x = 0, 0.5, 1).
- Variable temperature and field-dependent magnetization measurements.
- Analysis of structural ordering influenced by calcination temperature.
Main Results:
- Increased calcination temperature enhanced particle size and structural ordering.
- Lower temperatures resulted in short-range, non-crystalline structures and superparamagnetism.
- Higher temperatures induced long-range crystalline and magnetic ordering.
- A transition from superparamagnetic to antiferromagnetic behavior was observed.
Conclusions:
- Calcination temperature is a key parameter for controlling structural and magnetic properties of Co$_{1-x}$Ni$_x$TeO$_4$ nanoparticles.
- Stable magnetic order up to ~6 nm can be achieved by tuning structural ordering.
- This study introduces a new class of nanomaterials with tunable magnetic properties.
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