Spin moment over 10-300 K and delocalization of magnetic electrons above the Verwey transition in magnetite

Physics – Condensed Matter – Strongly Correlated Electrons

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

5 pages, 5 figures, to appear in Journal of Physics and Chemistry of Solids

Scientific paper

10.1016/j.jpcs.2007.03.037

In order to probe the magnetic ground state, we have carried out temperature dependent magnetic Compton scattering experiments on an oriented single crystal of magnetite (Fe$_3$O$_4$), together with the corresponding first-principles band theory computations to gain insight into the measurements. An accurate value of the magnetic moment $\mu_S$ associated with unpaired spins is obtained directly over the temperature range of 10-300K. $\mu_S$ is found to be non-integral and to display an anomalous behavior with the direction of the external magnetic field near the Verwey transition. These results reveal how the magnetic properties enter the Verwey energy scale via spin-orbit coupling and the geometrical frustration of the spinel structure, even though the Curie temperature of magnetite is in excess of 800 K. The anisotropy of the magnetic Compton profiles increases through the Verwey temperature $T_v$ and indicates that magnetic electrons in the ground state of magnetite become delocalized on Fe B-sites above $T_v$.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Spin moment over 10-300 K and delocalization of magnetic electrons above the Verwey transition in magnetite 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 Spin moment over 10-300 K and delocalization of magnetic electrons above the Verwey transition in magnetite, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spin moment over 10-300 K and delocalization of magnetic electrons above the Verwey transition in magnetite will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-285628

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.