The electrical resistance measurements of (Mg,Fe)SiO3 perovskite at high pressures and implications for electronic spin transition of iron

Details The electrical resistance measurements of (Mg,Fe)SiO3 perovskite at high pressures and implications for electronic spin transition of iron The electrical resistance measurements of (Mg,Fe)SiO3 perovskite at high pressures and implications for electronic spin transition of iron

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010pepi..180..154o&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 180, Issue 3-4, p. 154-158.

Physics

Scientific paper

We have measured the electrical resistance of (Mg0.9Fe0.1)SiO3 perovskite with increasing pressure in a diamond-anvil cell (DAC). Results demonstrate that the electrical conductivity increased with pressure to about 70 GPa, then conversely decreased to around 85 GPa, and again increased mildly to 135 GPa. As inferred from the previous studies of (Mg,Fe)O ferropericlase, the observed reduction in the conductivity of perovskite at 70-85 GPa is most likely due to the high-spin to low-spin transition of iron; it decreases the number of unpaired electrons and therefore diminishes the conduction by electron hopping between the ferric and ferrous iron sites. Present conductivity data provide valuable implications for the pressure range of spin transition in (Mg,Fe)SiO3 perovskite, which has been highly controversial. The relatively abrupt reduction in the electrical conductivity above 70 GPa is reconciled with the spin-pairing transition in ferric iron, which may occur rather sharply at this pressure range.

Affiliated with

Also associated with

No associations

Rating

The electrical resistance measurements of (Mg,Fe)SiO3 perovskite at high pressures and implications for electronic spin transition of iron 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 The electrical resistance measurements of (Mg,Fe)SiO3 perovskite at high pressures and implications for electronic spin transition of iron, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The electrical resistance measurements of (Mg,Fe)SiO3 perovskite at high pressures and implications for electronic spin transition of iron will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1596405