Measuring High-Pressure Electronic and Magnetic Properties Chapter uri icon

DCO ID 11121/4439-9199-2446-3406-CC

is Contribution to the DCO

  • YES

year of publication

  • 2015

abstract

  • Measurements of the electronic and magnetic properties of the Earth and planetary materials at high pressure play a crucial role in modern geoscience. There have been numerous advances in the field, primarily as a result of developments in diamond anvil cell methods. In particular, synchrotron radiation techniques play an especially important role. The chapter begins with a short review of fundamental properties of the relevant materials, with emphasis on how these are altered under very high pressures and temperatures of the Earth's deep interior, followed by a discussion of different classes of electronic and magnetic excitations. Various techniques currently used for high-pressure studies are then described, beginning with optical spectroscopies, Mössbauer spectroscopy, elastic x-ray and neutron scattering, many new x-ray spectroscopy and inelastic scattering methods, transport techniques, and finally resonance methods. Selected examples of the techniques are given, with a common theme being the highPT  behavior of iron-containing oxides, silicates, and metals at conditions found throughout the Earth's interior. Applications to upper mantle phases, ‘simple’ oxides, silicate perovskite and postperovskite, volatiles, and iron and iron alloys are discussed, with an emphasis given to integrated studies utilizing a combination of different techniques to understand high PT  electronic and magnetic phenomena.

volume

  • 2