What is it about?
At low temperatures, electron spins relax in different ways. Spin-glass and superparamagnetic relaxation are one of them. In spin-glass, we can have a prominent memory effect, but on the other hand, the memory effect is subdued in a superparamagnetic system. We have shown that we can tune the degree of magnetic memory effect in the same system by controlling the geometry in the nanoscale.
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Why is it important?
To our knowledge, this is the first time a finding has established a possible interconvertibility between these two types of spin behavior. Knowing the correlation between the spin behavior and geometry, we can, in principle, fabricate memory devices with more efficiency.
Perspectives
Spin relaxation is slightly out of fashion now. However, I strongly believe that this work again attracts the scientific community towards this field and more fruitful research is yet to come. Besides, the interesting part is the geometry modification. This area will receive more attention.
Sourav Sarkar
S N Bose National Centre for Basic Sciences
Read the Original
This page is a summary of: Geometry mediated spin relaxation in ZnFe2O4 spinel ferrite nanostructures, Journal of Applied Physics, December 2024, American Institute of Physics,
DOI: 10.1063/5.0241959.
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