Local atomic disorder and temperature dependence of saturation magnetization in yttrium iron garnet

Pena Garcia, Ramón Raudel; Guerra Dávila, Yuset; Oliveira, Dyego Maia de; Franco Júnior, Adolfo; Padrón Hernández, Eduardo

Local atomic disorder and temperature dependence of saturation magnetization in yttrium iron garnet

Data

2020

Autores

Pena Garcia, Ramón Raudel

Guerra Dávila, Yuset

Oliveira, Dyego Maia de

Franco Júnior, Adolfo

Padrón Hernández, Eduardo

Resumo

In the present work experimental data for saturation magnetization at low temperatures, of yttrium iron garnet nanoparticles are different from that expected by the T3/2 Bloch's Law. This result is mainly conditioned by the local atomic disorder induced during the nanoparticles preparation by using the sol gel method. To correctly describe the experimental curves, a fitting using Cojocaru's theory was performed because the model uses geometric and other conditions in agreement with our experimental results. The magnetic ions localized at the nanoparticles surface, outside the crystalline periodicity, are the responsible by the saturation magnetization behavior presented here.

Palavras-chave

Saturation magnetization, Bloch law, YIG, Sol gel, Atomic disorder

Citação

PEÑA-GARCIA, R. et al. Local atomic disorder and temperature dependence of saturation magnetization in yttrium iron garnet. Ceramics International, Amsterdam, v. 46, n. 5, p. 5871-5875, 2020. DOI: 10.1016/j.ceramint.2019.11.038. Disponível em: https://www.sciencedirect.com/science/article/pii/S027288421933216X. Acesso em: 4 set. 2023.