Room Temperature Exchange Bias in BiFeO sub(3)/Co-Fe Bilayers

Thin highly epitaxial BiFeO sub(3) films were prepared on SrTiO sub(3) (100) substrates by reactive magnetron cosputtering. Detailed magneto-optic Kerr effect (MOKE) measurements on BiFeO sub(3)/Co-Fe bilayers were performed to investigate the exchange bias as a function of film thicknesses and Co-F...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on magnetics 2016-07, Vol.52 (7), p.1-4
Main Authors: Sterwerf, Christian, Meinert, Markus, Arenholz, Elke, Schmalhorst, Jan-Michael, Reiss, Gunter
Format: Article
Language:English
Subjects:
Anisotropy
Bias
Coercive force
Exchange
Film thickness
Magnetoresistance
Magnetoresistivity
Stoichiometry
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Thin highly epitaxial BiFeO sub(3) films were prepared on SrTiO sub(3) (100) substrates by reactive magnetron cosputtering. Detailed magneto-optic Kerr effect (MOKE) measurements on BiFeO sub(3)/Co-Fe bilayers were performed to investigate the exchange bias as a function of film thicknesses and Co-Fe stoichiometries. We found a maximum exchange bias of $H_{\mathrm {eb}}=92$ Oe and a coercive field of $H_{c}=89$ Oe for a 12.5 nm-thick BiFeO sub(3) film with a 2 nm-thick Co layer. The unidirectional anisotropy is clearly visible in in-plane rotational MOKE measurements. Anisotropic magnetoresistance measurements reveal a strongly increasing coercivity with decreasing temperature, but no significant change in the exchange bias field.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2015.2510544