U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PUBLICATIONS

Temporal and Temperature Variations of DC Magnetic Aftereffect Mesurements of Fe3O4 Powders

Published

Author(s)

H. Seyoum, Lawrence H. Bennett, Edward Della Torre

Abstract

The temperature variation of the magnetic relaxation process obtained from DC magnetization measurements are investigated in fine Fe3O4 powder in the temperature range 5 K < T < 300 K. The maximum decay rate, S= d(M)/d[ln(t)], shows two distinct relaxation processes. The two processes remarkably display same pronounced peaks at 10, 35, 60 and 85 K below Verwey transition (TV) and different behavior above TV. At the same time, high field irreversibility in M (T) curves in zero-field cooled and field cooled (ZFC-FC) processes and considerable increase in coercivity have also been observed below TV. This is related to the freezing of disordered spins in a reorganization of domain structure.
Citation
Journal of Applied Physics
Pub Type
Journals

Keywords

DC magnetic aftereffect measurement, magnetic relaxation, temperature variations, temporal variations

Citation

Seyoum, H. , Bennett, L. and Della Torre, E. (2021), Temporal and Temperature Variations of DC Magnetic Aftereffect Mesurements of Fe<sub>3</sub>O<sub>4</sub> Powders, Journal of Applied Physics (Accessed December 4, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created October 12, 2021