Exchange bias in amorphous Fe-B-Nb thin films
(English)Manuscript (preprint) (Other academic)
Amorphous thin films of Fe-B-Nb alloy prepared by Pulse Laser Deposition (PLD) have been studied for their magnetic properties. Films of different thicknesses (200-400nm) were cooled from room temperature down to 5K at remnant state of magnetization (MR) and inplane magnetic hysteresis loops were measured at different temperatures (5-300K). At room temperature, soft ferromagnetism was observed while hysteresis loops revealed a shift from origin by giving rise to the exchange bias anisotropy at liquid helium temperatures. The magnitude of this shift, anisotropy, decreased exponentially by increasing temperature and fully disappears at ~30K. The significant shift of the hysteresis loops observed at liquid helium temperatures after cooling from MR and strong irreversibility between zero field cooled (ZFC) and field cooled (FC) magnetization curves probed under different magnetic fields (5-20Oe) reveal the presence of spin-disorder phase, which influences significantly the low temperature behavior in the present amorphous thin films.
Other Engineering and Technologies
IdentifiersURN: urn:nbn:se:kth:diva-101836OAI: oai:DiVA.org:kth-101836DiVA: diva2:549759
QC 201209062012-09-062012-09-052012-09-06Bibliographically approved