Signatures of Spin Glass Freezing in NiO Nanoparticles

TL;DR

This study investigates the magnetic behavior of NiO nanoparticles, revealing spin glass characteristics through various susceptibility and magnetization measurements, highlighting size-dependent magnetic phenomena.

Contribution

The paper provides a comprehensive experimental analysis demonstrating spin glass behavior in NiO nanoparticles, a novel insight into their magnetic properties.

Findings

NiO nanoparticles exhibit spin glass behavior.

Magnetic properties depend on particle size.

Evidence from ac susceptibility and magnetization measurements.

Abstract

We present a detailed study of the magnetic properties of sol-gel prepared nickel oxide nanoparticles of different sizes. We report various measurements such as frequency, field and temperature dependence of ac susceptibility, temperature and field dependence of dc magnetization and time decay of thermoremanent magnetization. Our results and analysis show that the system behaves as a spin glass.