Exchange bias in GeMn nanocolumns: the role of surface oxidation

Details Exchange bias in GeMn nanocolumns: the role of surface oxidation Exchange bias in GeMn nanocolumns: the role of surface oxidation

2010-08-17

arxiv.org/abs/1008.2872v1

APPLIED PHYSICS LETTERS 97, 062501 (2010)

Physics

Condensed Matter

Materials Science

7 pages, 5 figures

Scientific paper

10.1063/1.3476343

We report on the exchange biasing of self-assembled ferromagnetic GeMn nanocolumns by GeMn-oxide caps. The x-ray absorption spectroscopy analysis of this surface oxide shows a multiplet fine structure that is typical of the Mn2+ valence state in MnO. A magnetization hysteresis shift |HE|~100 Oe and a coercivity enhancement of about 70 Oe have been obtained upon cooling (300-5 K) in a magnetic field as low as 0.25 T. This exchange bias is attributed to the interface coupling between the ferromagnetic nanocolumns and the antiferromagnetic MnO-like caps. The effect enhancement is achieved by depositing a MnO layer on the GeMn nanocolumns.

Affiliated with

Also associated with

No associations

Rating

Exchange bias in GeMn nanocolumns: the role of surface oxidation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Exchange bias in GeMn nanocolumns: the role of surface oxidation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exchange bias in GeMn nanocolumns: the role of surface oxidation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-397787