AC Susceptibility and EPR Investigations of Superspin Dynamics in Manganese Oxide Nanoparticles

Mahesh Koirala, University of Texas at El Paso

Abstract

We have investigated the superspin dynamics of 5 nm and 10 nm mixed state Mn3O4 nanoparticles utilizing ac-susceptibility and electron paramagnetic resonance measurements. The out of phase component of the ac-susceptibility measurements show a magnetic anomaly below (T < TN) the paramagnetic to ferrimagnetic transition (TN ≅ 41K) of the selected material. EPR spectra show markedly different magnetic signatures which corroborate the particle size dependence as shown in the low-temp ac-susceptibility scans, both of which depict superparamagnetic behavior.^

Subject Area

Physics|Nanotechnology|Materials science

Recommended Citation

Koirala, Mahesh, "AC Susceptibility and EPR Investigations of Superspin Dynamics in Manganese Oxide Nanoparticles" (2017). ETD Collection for University of Texas, El Paso. AAI10615918.
https://digitalcommons.utep.edu/dissertations/AAI10615918

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