Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2009-12-07
Physics
Condensed Matter
Strongly Correlated Electrons
with some amendments published in Europhysics Letters (EPL) 88 (2009) 57002; http://epljournal.edpsciences.org
Scientific paper
The nature of a puzzling high temperature ferromagnetism of doped mixed-valent vanadium oxide nanotubes reported earlier by Krusin-Elbaum et al., Nature 431 (2004) 672, has been addressed by static magnetization, muon spin relaxation, nuclear magnetic and electron spin resonance spectroscopy techniques. A precise control of the charge doping was achieved by electrochemical Li intercalation. We find that it provides excess electrons, thereby increasing the number of interacting magnetic vanadium sites, and, at a certain doping level, yields a ferromagnetic-like response persisting up to room temperature. Thus we confirm the surprising previous results on the samples prepared by a completely different intercalation method. Moreover our spectroscopic data provide first ample evidence for the bulk nature of the effect. In particular, they enable a conclusion that the Li nucleates superparamagnetic nanosize spin clusters around the intercalation site which are responsible for the unusual high temperature ferromagnetism of vanadium oxide nanotubes.
Arango Y. C.
Büchner Bernd
Kataev Vladislav
Klauss Hans-Henning
Klingeler Rüdiger
No associations
LandOfFree
High temperature ferromagnetism of Li-doped vanadium oxide nanotubes 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 High temperature ferromagnetism of Li-doped vanadium oxide nanotubes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High temperature ferromagnetism of Li-doped vanadium oxide nanotubes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-243287