Uncompensated moments in antiferromagnets: Origin, properties and role in exchange bias

Author

Roshchin, Igor V. ; Badgley, Karie E. ; Zhernenkov, Mikhail ; Fitzsimmons, Michael R. ; Varela, Maria ; Pennycook, Stephen J. ; Li, Zhi-Pan ; Ponce, H. ; Romero, A.H. ; Miller, Casey W. ; Schuller, Ivan K.

fYear

2010

fDate

20-24 Sept. 2010

Firstpage

631

Lastpage

632

Abstract

Presented is a study of uncompensated magnetization in antiferromagnets performed by SQUID and VSM magnetometry, and polarized neutron reflectometry. This uncompensated magnetization is observed and studied as a function of temperature and cooling conditions. Uncompensated magnetization is found close to the top surface of the antiferromagnet (interface with the ferromagnet) and also in the “bulk” of the antiferromagnetic film. It has been established that this uncompensated magnetization plays crucial role in exchange bias. To understand the origin of uncompensated magnetization, ab initio calculations are performed.

Keywords

ab initio calculations; antiferromagnetic materials; exchange interactions (electron); magnetic moments; magnetic thin films; magnetisation; SQUID; VSM magnetometry; ab initio calculations; antiferromagnetic film; cooling conditions; exchange bias; polarized neutron reflectometry; top surface; uncompensated magnetization; uncompensated moments; Book reviews; Frequency modulation; Magnetic domains; Magnetic hysteresis; Magnetic recording; Magnetization; Magnetometers;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetics in Advanced Applications (ICEAA), 2010 International Conference on

Conference_Location

Sydney, NSW

Print_ISBN

978-1-4244-7366-3

Type

conf

DOI

10.1109/ICEAA.2010.5651210

Filename

5651210